100VG	100 Voice Grade [technology]
10GE	10 GigaBIT Ethernet (ethernet, BIT)
10Q	thank you
10X	thanks
1337	elite ("leet")
1D2B	1 D-channel 2 B-channels (BRI, ISDN)
224	today, tomorrow, forever
2B1D	2 B-channels 1 D-channel (BRI, ISDN)
2S2D	Double Sided - Double Density (FDD)
31337	elite ("eleet")
3DC	3D Consortium (org., Sanyo, Sharp, Sony, ...)
3DDDI	3D Device Dependent Interface (MS), "3D DDI"
3DRAM	3 Dimensional Random Access Memory (RAM)
3GIO	Third Generation Input/Output (PCIe)
3GIP	3rd Generation . Internet Protocol (org., IP, GPRS, WLAN, mobile-systems), "3G.IP"
3GL	3rd Generation Language
3GPP	Third Generation Partnerships Projects (org.)
3PCC	Third Party Call Control (SIP, RFC 3725)
4GFC	4th Generation Fibre Channel (FC), "4G FC"
4GL	4th Generation Language
4GT	4 GB [RAM] Tuning (RAM, GB)
4MV	4 Motion Vector
4TW	for the win
5GL	5th Generation Language
7E1	7 [bits], Even [parity], 1 [stop bit] (MODEM, BIT)
80211HR	802.11 High Rate (IEEE, WLAN), "802.11/HR"
8B10B	8 bit / 10 bit [encoding] (IBM, FC, BIT), "8B/10B"
8N1	8 [bits], No [parity bit], 1 [stop bit] (MODEM, BIT)
8PSK	8 Phase Shift Keying (EDGE, mobile-systems)
8VSB	8-Vestigial Side Band, "8-VSB"
A/S/L	age/sex/location
A2DP	Advanced Audio Distribution Profile (Bluetooth)
A4C	Authentication, Authorization, Accounting, Auditing and Charging
A4WP	Alliance for Wireless Power (org.)
AA	Auto Answer (MODEM)
AAA	Authentication, Authorization and Accounting [= Triple A]
AAAAA	Anonym Association Against Acronym Abuse (slang)
AAAI	American Association for Artificial Intelligence (org., AI, USA)
AAAS	American Association for the Advancement of Science (org., USA)
AAC	Advanced Audio Coding (IIS, MPEG, AT&T, Dolby, Sony, ...)
AAC	Authorization and Access Control (IETF)
AACLC	Advanced Audio Coding - Low Complexity [profile] (AAC), "AAC-LC"
AACLTP	Advanced Audio Coding - Long Term Production (AAC), "AAC-LTP"
AAD	Authorized AutoCAD Dealer (carCAD, CAD)
AAD	Azure Active Directory (MS)
AADN	American Association of Domain Names (org., USA, Internet)
AAE	Allgemeine AnschaltErlaubnis (DTAG)
AAF	Advanced Authoring Format (MS)
AAIM	Association for Applied Interactive Multimedia (org.)
AAIS	Allied command europe ACCIS Implementation Strategy (ACCIS, NATO, mil.)
AAL	ATM Adaption Layer (ATM)
AAL	Ambient Assisted Living
AAL	Authentication Assurance Level (CC)
AAM	Automatic Acoustic Management (ATA, HDD)
AAMOF	As A Matter Of Fact (slang, Usenet, IRC)
AAMOF	as a matter of fact
AAMSI	American Association for Medical Systems Informatics (org., USA)
AAP	Address Allocation Protocol (Multicast)
AAP	Applications Access Point
AAP	Association of American Publishers (org., USA)
AARP	Appletalk Address Resolution Protocol (Apple, AppleTalk)
AASP	ASCII Asynchronous Support Package (ASCII)
AAT	Average Access Time
AATL	Adobe Approved Trust List (Adobe)
AATP	Authorized Academic Training Program (MS, MCSD)
AAUI	Apple Attachment Unit Interface (Apple, AppleTalk)
AAWA	Advanced Autonomous Waterborne Applications (org.)
ABA	American Bankers Association (org., USA, banking)
ABAP4	Advanced Business Application Programming/4 (SAP, R/3, 4GL), "ABAP/4"
ABATS	Automatic Bit Access Test System (BIT)
ABBS	Apple Bulletin Board System (Apple)
ABC	Atanasoff-Berry-Computer
ABCD	Altavista Business Card Directory (WWW)
ABD	all but dissertation
ABEL	Advanced Boolean Expression Language
ABEND	ABnormal END (Netware)
ABI	Adaptive Bit Inversion (SSD)
ABI	Aktionsbuendnis fuer Barrierefreie Informaionstechnik Org., Germany
ABI	Application Binary Interface (POE)
ABIOS	Advanced Basic Input Output System (IBM)
ABIST	Automatic Built In Self Test (IBM)
ABM	Asynchronous Balanced Mode
ABNF	Augmented Backus-Naur Form (BNF, RFC 733/2234)
ABP	Address Book Provider (Internet)
ABR	Available Bit Rate (ATM, CBR, VBR, UBR, QOS, BIT)
ABS	Albatron BIOS Security (BIOS)
ABS	Apple Business Systems (Apple)
ABUI	Association of Banyan Users International (org., Banyan, VINES, user group, predecessor, ENA)
AC	Access Concentrator (PPPoE, ADSL)
AC	Access Control (Token Ring, ...)
AC	Amiga Club (org., user group, Amiga)
AC	Area Code
AC	Automatic Computer
AC	audible chuckle
AC3	[digital] Audio Compression - 3 (Dolby, DVD, Digital audio), "AC-3"
AC97	Audio CODEC 97 (Intel, CODEC)
ACA	Asynchronous Communications Adapter
ACAD	AutoCAD (carCAD, CAD)
ACAS	Application Control Architecture Services (DEC)
ACAT	Assistive Context-Aware Toolkit (Intel)
ACAU	Automatic Calling and Answering Unit
ACC	Adaptive Cruise Control (car)
ACC	Area Communication Controller (MODACOM)
ACC	Atari Competence Center
ACCIS	Automated Command and Control Information System (mil., USA)
ACCM	Asynchronous Character Control Map (PPP)
ACCS	Army Command and Control System (mil., USA)
ACCU	Association of C and C++ Users (org., UK)
ACD	Automated Call Distribution (CTI)
ACDC	Alternating Current/Direct Current, "AC/DC"
ACDI	Asynchronous Communications Device Interface (IBM, CM/2)
ACE	ASCII Compatible Encoding (ASCII, Internet)
ACE	Access Control Entry (AD, ACL)
ACE	Actuator Control Electronics (Airbus, A380)
ACE	Adobe Color Engine (Adobe)
ACE	Advanced Computing Environment (manufacturer)
ACE	Autonomous Computer Engine (WD)
ACES	APEC Cooperation for Earthquake Simulation (org., Australia, China, Japan, USA)
ACF	Access Control Field
ACF	Advanced Communications Function (IBM)
ACF	Apple Communications Framework (Apple)
ACFC	Address and Control Field Compression (PPP)
ACFNCP	Advanced Communication Function / Network Control Program (IBM, ACF), "ACF/NCP"
ACFTCAM	Advanced Communication Function / Telecommunications Access Method (IBM, ACF), "ACF/TCAM"
ACFVTAM	Advanced Communication Function / Virtual Telecommunications Access Method (IBM, ACF), "ACF/VTAM"
ACH	Association for Computers and the Humanities (org., USA)
ACIA	Associacio Catalana d'Intelligencia Artificial (org., Spain, AI)
ACIA	Asynchronous Communications Interface Adapter
ACID	ANSI Creators in Demand (ANSI), "ACiD"
ACID	Analysis Console for Intrusion Databases (IDS, CERT)
ACID	Atomicity - Consistency - Isolation - Durability (DB, TP)
ACIS	American Committee for Interoperable Systems (org., USA)
ACL	Access Control List (DCE, DFS, NDS, AD)
ACL	Advanced CMOS Logic
ACL	Agent Control Language (Agents)
ACL	Association for Computational Linguistics (org., USA)
ACL	Asynchronous ConnectionLess (HCI, Bluetooth)
ACL	Autodesk Campus License (cardesk)
ACL	[MS] Access Compatibility Layer (MS, DB)
ACLF	Access Control List Facility (DCE)
ACM	Abstract Control Model (USB, MS, Windows)
ACM	Address Complete Message (ATM)
ACM	Association for Computing Machinery (org., USA)
ACMC	Australian CEFACT Management Committee (Australia, org., CEFACT)
ACMDSD	Architecture Centric Model Driven Software Development (MDSD), "AC-MDSD"
ACME	A Company that Makes Everything (slang)
ACMS	Application Control Management System
ACNS	Application and Content Networking System (Cisco)
ACO	AMP Communications Outlet
ACOPS	Automatic CPU Overheating Prevention System (GigaByte), "A-COPS"
ACOT	Apple Classrooms Of Tomorrow (Apple)
ACP	Active Configuration Profile (MODEM)
ACP	Analog Content Protection (WPE)
ACP	Auxillary Control Process
ACP	Average CPU Power (CPU, TDP)
ACPA	Audio Capture and Playback Adapter (IBM)
ACPC	Apple Communications Protocol Card (Apple)
ACPI	Advanced Configuration and Power Interface (Intel, MS, Toshiba, ACPI, OSPM, BIOS)
ACPICA	Advanced Configuration and Power Interface - Component Architecture (ACPI, Intel), "ACPI-CA"
ACPT	Automated Corporate Planning Tool
ACR	Adobe Camera Raw
ACR	Anonymous Call Rejection
ACR	Artificial Content Recognition (Puresight, WWW, AI)
ACR	Attenuation to Crosstalk Ratio (cable)
ACR	Automatic Call Recording
ACRONYM	Abbreviated Coded Rendition Of Name Yielding Meaning (slang)
ACRONYM	Abbreviation by CROping Names that Yield Meaning (slang)
ACS	Access Control System (DISA)
ACS	Advanced Communications System
ACS	Advanced Console Server (Cyclades)
ACS	Alternate Character Set
ACS	Architekten, Computer, Systeme (fair)
ACS	Asynchronous Communication Server
ACS	Australian Computer Science
ACS	Australian Computer Society (org., Australia)
ACS	Auto Configuration Server (ISP, DSL, CPE)
ACSAC	Annual Computer Security Applications Conference
ACSE	Association Control Service Element (OSI, ISO, DIS 8649)
ACSI	Advanced/Atari Computer System Interface (Atari)
ACSMIB	ATM Circuit Steering Management Information Base (ATM, MIB), "ACS-MIB"
ACSNET	Academic Computing Services NETwork
ACSS	Aural Cascading Style Sheets (CSS, HTML, WWW)
ACT	Application Compatibility Toolkit (MS, Windows, Vista)
ACT	Architecture Characterization Template (DISA)
ACTA	America's Carriers Telecommunications Association (USA)
ACTEF	ACcess TEchnologies Forum (org.)
ACTP	Adobe Certified Training Provider (Adobe)
ACTPU	ACTivate Physical Unit (SNA)
ACTS	Advanced Communications Technologies and Services (Europe, ACTS)
ACU	Automatic Calling Unit
ACU	Automatic Client Update (Novell, Netware)
ACUTA	Association of College and University Telecommunication Administrators (org., USA)
ACUTE	Airbus Cockpit Universal Thrust Emulator (Airbus, A380)
AD	Active Directory (MS, Windows, AD, DS)
AD	Analog-to-Digital (D/A), "A/D"
AD	Authorized Distributor (DEC)
AD	Autonomous Domain
ADA	Automatic Data Acquisitions
ADAC	Active Directory Administrative Center (AD)
ADAPSO	Association of Data Processing Service Organisation (org., USA)
ADAPT	Architecture Design, Analysis, and Planning Tool
ADAS	Advanced Dirver Assistance Systems
ADATP	Allied DATa processing Publication (mil., USA)
ADB	A DeBugger (Unix)
ADB	Android Debug Bridge (Android)
ADB	Apple Desktop Bus (Apple)
ADBA	Active Directory Based Activation (AD, KMS)
ADBS	Advanced Data Broadcasting System (DirecPC)
ADC	Adaptive Data Compression (MODEM)
ADC	Analog to Digital Converter
ADC	Apple Display Connector (Apple)
ADC	Apple Distribution Center (Apple)
ADC	Automatic Data Capture
ADCCP	Advanced Data Communications Control Procedure (ANSI)
ADD	AGP Digital Display [adapter] (AGP)
ADD	Adapter Device Driver (OS/2)
ADD	attention deficit disorder
ADDC	Automatic Data Direction Control (RS-485)
ADDDC	Automatic Direct Distance Dialing System
ADDS	Active Directory Domain Services (AD), "AD DS"
ADE	Application Development Environment
ADE	Aufforderung zur DatenEingabe (BTX)
ADEPT	Administrative Data Entry for Processing Transmission (mil., USA)
ADES	Automatic Digital Encoding System
ADEW	Andrew Development Environment Workbench (ATK, Unix)
ADF	Access control Decision Function (mil., USA)
ADF	Automatic Document Feeder
ADFS	Active Directory Federation Services (AD)
ADFS	Advanced Disc Filing System (RiscOS, FS)
ADG	[RAID] Advanced Data Guarding (RAID, HP)
ADHD	attention deficit (and) hyperactivity disorder
ADI	AUTODIN-to-DISN Interface (AUTODIN, DISN, mil., USA)
ADI	Autocad Device Interface (CAD, carCAD)
ADIMM	Asynchronous Dual Inline Memory Module (DIMM, IC, Leadtek)
ADIRU	Air Data Inertial Reference Unit (Airbus, A380, Honeywell)
ADK	Additional Decryption Key (PGP)
ADL	Adventure Description Language
ADL	[international conference on the] Advances in Digital Libraries (IEEE)
ADLC	Asynchronous Data Link Control
ADLDS	Active Directory Lightweight Directory Services (MS), "AD LDS"
ADM	Add-Drop-Multiplexer
ADMA	Area Division Multiple Access (mobile-systems)
ADMD	ADministration Management Domain (X.400)
ADMF	ADMinistration Function (UMTS)
ADMS	Access Device Messaging Specification (banking, Visa)
ADMT	Active Directory Migration Tool (MS, AD)
ADN	any day now
ADO	ActiveX Data Objects (ASP, ODBC, MS, IIS)
ADODB	ActiveX Data Objects DataBase [library] (ADO, PHP), "ADOdb"
ADONIS	ADvanced On-Screen Information System, "AdonIS"
ADOS	attention deficit ... oh, shiny!
ADP	Administrative Data Processing
ADP	Advanced Data Processing
ADP	Automatic Data Processing (ADP)
ADPCM	Adaptive Delta Pulse Code Modulation
ADPE	Automatic Data Processing Equipment (ADP)
ADPLO	Automated Data Processing Liaison Office (ADP)
ADPS	Automatic Data Processing System (ADP)
ADPT	Automated Data Processing/Telecommunications (ADP), "ADP/T"
ADR	Advanced Digital Recording (Streamer, Philips, OnStream)
ADR	Automated Distance Regulation (car)
ADRT	Adaptive Document Recognition Technology (OCR, Abbyy)
ADS	Active Directory Services (MS)
ADS	Advanced Digital System
ADS	Application Development System
ADS	Automated Deployment Service (MS, RIS)
ADS	Automatic Distribution System
ADS	Automatic Documenting System (LAN)
ADS	Auxiliary Data System
ADSA	Advanced Driver Software Architecture (C-Media, audio)
ADSI	Active Directory Service Interface (MS, COM, AD)
ADSIA	Allied Data Systems Interoperability Agency (org., NATO, mil.)
ADSL	Asymmetric Digital Subscriber Line [technology] (BELLCORE, AT&T, DSL, ADSL)
ADSL	Asymmetric Digital Subscriber Loop [modulation]
ADSP	Advanced Digital Signal Processor (DSP)
ADSP	Appletalk Data Stream Protocol (Apple, AppleTalk)
ADSP	Author Domain Signing Practices (DKIM, RFC 5617)
ADSR	Attack, Decay, Sustain, Release [generator] (VCA, audio)
ADSU	ATM Data Service Unit (ATM)
ADT	Abstract Data Type
ADT	Access Developer's Toolkit (MS, DB, Windows)
ADT	Android Developer Tools (Android)
ADT	Application Data Type
ADT	Application Development Tools (IBM, AS/400)
ADT	Atlantic Daylight Time [-0300] (TZ, AST)
ADU	Automatic Dialing Unit
ADUA	Administrative Directory User Agent
ADV	Automatisierte DatenVerarbeitung
ADV	staatliche Akademie fuer DatenVerarbeitung (org., Uni Boeblingen, Germany)
ADVS	Automatisiertes DatenVerarbeitungsSystem
ADX	Automatic Data eXchange
AE	Apple Events (Apple)
AE	Application Entity / Environment / Execution / Engineering (APE)
AEA	American Electronics Association (org., USA)
AEA	Asynchroner EmulationsAdapter (IBM)
AEAP	as early as possible
AEB	Analog Expansion Bus
AEC	Advanced Error Correction (CD)
AECBF	Acoustic Echo Cancellation / Beam Forming (audio), "AEC/BF"
AEF	Access control Enforcement Function
AEGIS	Advanced Electronic Guidance and Instrumentation System
AEI	Application Enabling Interface (IBM)
AEI	Automatic Equipment Identification
AEIMP	Apple Event Interprocess Messaging Protocol (Apple)
AEL	Asterisk Extension Language (VoIP)
AEM	Automatic Emulation Management (Brother)
AEOM	Apple Events Object Model (Apple)
AEPIA	Asociacion Espanola Para la Inteligencia Artificial (org., Spain, AI)
AERO	Authentic, Energetic, Reflective, Open (MS, Windows, Vista, GUI)
AES	Advanced Encryption Standard (cryptography)
AES	Application Environment Service / Specification (OSF)
AES	Automatic Emulation Switching (Lexmark)
AESCCMP	AES Counter mode CBC MAC Protocol (AES, CBC, MAC, cryptography, IEEE 802.11i, WLAN), "AES-CCMP"
AESEBU	Auto Engineering Society/European Broadcasting Union (Digital audio), "AES/EBU"
AESNI	Advanced Encryption Standard - New Instructions (AES, cryptography), "AES-NI"
AETE	Apple Event Terminology Extension (Apple)
AETIC	Asociacion de empresas de Electronica, Tecnologias de la Informacion y teleComunicaciones de espana (org., Spain)
AEUT	Apple Event User Terminology (Apple)
AF	Anisotropic Filter
AF	Auxiliary carry Flag (assembler)
AFA	All Flash Array
AFA	Association Fournisseur d'Access et service internet (org., ISP, France)
AFAIAC	as far as I am concerned
AFAIC	As Far As I'm Concerned (slang, Usenet, IRC)
AFAIC	as far as I'm concerned
AFAICR	As Far As I Can Recall (telecommunication, Usenet, IRC)
AFAICR	as far as I can {recall,remember}
AFAICS	as far as I can see
AFAICT	As Far As I Can Tell (telecommunication, Usenet, IRC)
AFAICT	as far as I can tell
AFAIK	As Far As I Know (slang, Usenet, IRC)
AFAIK	as far as I know
AFAIR	As Far As I Recall / Remember (slang, Usenet, IRC)
AFAIR	as far as I {recall,remember}
AFAIU	as far as I understand
AFAMPE	[u.s.] Air Force Automated Message Processing Exchange (org., USA. mil.)
AFC	Alkaline Fuel Cell
AFC	AntiFerromagnetically Coupled [technology] (IBM, HDD)
AFC	Application Foundation Classes (MS, GUI, Java)
AFC	Automatic Font Change
AFCET	Association Francaise pour la Cybernetique Economique et Technique (org., France)
AFD	Automatic File Distribution
AFD	away from desktop
AFDX	Avionics Full DupleX switched ethernet system (Airbus, A380, ethernet)
AFE	Apple File Exchange (Apple)
AFEB	AFrican EDIFACT Board (org., EDIFACT), "AF/EB"
AFF	Antigen File Filtering (Sybari)
AFFS	Advanced Fringe Field Switching (LCD, IPS), "A-FFS"
AFH	Adaptive Frequency Hopping (Bluetooth)
AFI	Authority Frame Identifier
AFI	Authority and Format Indicator (NSAP, IDP)
AFII	Association for Font Information Interchange (org., USA)
AFIN	Air Force Information Network (network, USA, mil.)
AFIPS	American Federation of Information Processing Societies (org.)
AFIS	AutomatisiertesFingerabdruck-InformationsSystem (INPOL)
AFK	Away from Keyboard (slang, Usenet, IRC)
AFK	away from keyboard
AFM	Atomic Force Microscopy [technology] (HDD, MEMS)
AFN	Advanced Fiber Network
AFNET	Air Force Network (network, USA, mil.)
AFP	Advanced Function Presentation (IBM)
AFP	Appletalk Filing Protocol (Apple, AppleTalk)
AFPA	Advanced Function Printing Architecture (IBM)
AFPDS	Advanced Function Printing Data Stream (IBM)
AFPL	Aladdin Free Public License
AFPL	Artifex Free Public License
AFR	Annualized Failure Rate (Maxtor, HDD)
AFS	Andrew File System (IBM, Unix)
AFT	Authenticated Firewall Traversal (IETF)
AFTP	Anonymous File Transfer Protocol (FTP)
AFUU	Association Francaise des Utilisateurs d'Unix (org., France, Unix)
AFW	away from window
AGA	Advanced Graphics Adapter
AGAST	Adventure Game Authoring SysTem
AGC	Automatic Gain Control (audio)
AGCH	Access Grant CHannel (GSM, CCCH, mobile-systems)
AGE	Adobe Graphics Engine (Adobe)
AGEP	ArbeitsGemeinschaft Elektronisches Publizieren [e.v.] (org., DTP), "AgEP"
AGESA	AMD Generic Encapsulated Software Architecture (AMD)
AGF	Arbeitsgemeinschaft der GrossForschungseinrichtungen [deutschlands] (org.)
AGFMB	ArbeitsGemeinschaft Freier MailBoxen (org.)
AGI	Asterisk Gateway Interface (VoIP)
AGM	annual general meeting
AGNS	AT&T Global Network Services (AT&T)
AGNULA	A GNU/Linux Audio distribution (GNU, Linux, Europe)
AGOF	ArbeitsGemeinschaft Online Forschung [e.V] (org.)
AGP	Advanced / Accelerated Graphics Port (Intel, MMX, AGP)
AGPL	[GNU] Affero General Public License (GNU)
AGPS	Advanced / Assisted Global Positioning System (GPS), "A-GPS"
AH	[IP] Authentication Header (IPSEC, IPV6, RFC 1826, VPN)
AHA	AVM Home Automation (API)
AHB	Advanced High performance Bus (AMBA, ARM)
AHCI	Advanced Host Controller Interface (SATA)
AHFG	ATM-attached Host Functional Group (ATM, MPOA)
AHIMA	American Health Information Management Association (org., USA)
AHP	Analytical Hierachy Process
AHPCRC	Army High Performance Computing Research Center (org., USA, HPC)
AI	Adobe Illustrator (Adobe)
AI	Artificial Intelligence
AIA	Application Integration Architecture
AIAF	Artificial Intelligence AutoFocus (AI, Canon)
AIB	Add In (graphics) Board
AIBO	Artificial Intelligence roBOt (Sony, AI)
AIC	AIX windows Interface Composer (AIX, IBM)
AIC	[SRI] Artificial Intelligence Center (SRI, AI)
AICA	Associazione Italiana per l'Informatica ed il Calcolo Automatico (org., Italy)
AID	AUTODIN Interface Device (AUTODIN, mil., USA)
AID	Application IDentifier (APDU)
AID	Attention Interrupt Device [key] (IBM)
AIDA	Aktuelle Informationen in Deutsch zum Amiga (AC, Amiga)
AIDAT	African Internet Development Action Team (org., Internet)
AIDL	Android Interface Definition Language (Android)
AIDS	Automatic Installation and Diagnostic Service
AIFF	Audio Interchange File Format
AIFS	Arbitrary InterFrame Space (MAC, PCF, IFS, WLAN)
AIGLX	Accelerated Indirect OpenGL extension for the X window system (GLX, X-Windows)
AII	Active Input Interface (UNI, PMD, FDDI)
AIIA	Associazione Italiana per l'Intelligenza Artificiale (org., Italy, AI)
AIIM	Association for Information and Image Management (org., USA)
AIK	Attestation Identity Key (TCPA)
AIM	AOL Instant Messenger [protocol] (AOL, IM)
AIM	ATM / Ascend Inverse Multiplexing [protocol] (ATM)
AIM	Advanced Invar Mask (Display, ViewSonic)
AIM	Alternate Input Method (OS/2)
AIM	Apple, IBM, Motorola [consortium] (Apple, IBM, Motorola, org.)
AIM	Association of Imaging Manufacturers (org.)
AIM	Automatic Interface Management (Brother)
AIMD	Additive-Increase Multiplicative-Decrease (TCP)
AIMS	Apple Internet Mail Server (Apple)
AIMSRCF	Advanced Information Manager/Shared Resource Control Facility (Fujitsu), "AIM/SRCF"
AIN	Advanced Intelligent Network (IN)
AIN	Auto Insert Notification (CD-R)
AINEC	and it's not even close
AIO	Asynchronous Input/Output
AIP	ATM Interface Processor (ATM)
AIP	Association of Internet Professionals (org., Internet)
AIP	Associazione Informatici Professionisti (org., Italy)
AIR	Adobe Intergrated Runtime (Adobe)
AIR	Automatic Image Refinement (Canon), "A.I.R."
AIRTC	[international symposium on] Artificial Intelligence in Real-Time Control (IFAC, IFIP, IMACS, conference)
AIS	Account Information Security
AIS	Alarm Indication Signal (UNI, ATM, OAM, DS3/E3)
AIS	Application Information Service (MS, Windows, Vista)
AIS	Applied Information Sciences (manufacturer)
AIS	Applied Information Systems (manufacturer)
AIS	Arbeitgeber-Informations-Service (WWW)
AIS	Automated Information System
AIS	Autonomous Intelligent System
AISB	Association of Imaging Service Bureaus (org.)
AISE	Alarm Indication Signal-External (UNI, ATM), "AIS-E"
AISE	as I see it
AISIG	[south australian] Artificial Intelligence Special Interest Group (org., Australia, AI)
AISM	Asia International Symposium on Mechatronics (Konferenz)
AISP	Association for Internet Service Providers (org., USA, ISP)
AISP	Association of Information Systems Professionals (org., USA)
AISSO	Automated Information Systems Security Officer (mil., USA)
AIST	Agency of Industrial Science and Technology (org., Japan)
AIT	Advanced Intelligent Tape (Sony, Streamer)
AIT	Angewandte InformationsTechnik [verlags gmbh] (manufacturer)
AITEC	[research institute for] Advanced Information TEChnology (org., Japan)
AITO	Association Internationale pour les Technologies Objets (org.)
AIU	as I understand
AIUI	As I Understand It (slang, Usenet, IRC)
AIUI	as I understand it
AIW	APPN Implementers Workshop (org., APPN)
AIW	All In Wonder [graphic card] (ATI)
AIX	Advanced Interactive eXecutive (IBM, Unix, OS)
AIXESA	Advanced Interactive eXecutive/Enterprise Systems Architecture (IBM, AIX), "AIX/ESA"
AJAX	Asynchronous Javascript And XML (XML, XHTML, CSS, XSLT)
AJBS	Association of Japanese Business Studies (org., Japan)
AK	Application Kit (NextStep, OpenStep, Apple, Rhapsody)
AKA	Also Known As
AKA	also known as
AKI	Arbeitsgemeinschaft der deutschen KI Institute (org., KI)
AKI	Authority Key Identifier (X509v3, RFC 3280)
AKID	Authority Key IDentifier (X509v3, RFC 3280)
AKNN	Arbeitskreis fuer Numerierung und Netzzusammenschaltung (org.)
AKU	Adaptation Kit Update (Android)
AL	Artificial Life
AL	Assembly Language
ALAC	Apple Lossless Audio CODEC (Apple, CODEC, audio)
ALAN	Audio Local Area Network (audio), "A-LAN"
ALAP	Appletalk Link Access Protocol (Apple, AppleTalk)
ALAP	As Late As Possible (slang, Usenet)
ALAS	Asociacion Latinoamericana de Seguridad (org.)
ALC	Adaptation Layer Controller (ATM)
ALC	Arithmetic and Logic Circuits (IC)
ALC	Automatic Level Control
ALDC	Adaptive Lossless Data Compression (IBM)
ALE	Address Lifetime Expectation (org., IETF, IP)
ALE	Application Link Enabling (R/3, SAP)
ALE	Atlanta Linux Enthusiasts (org., Linux, user group)
ALE	Atomic Layer Epitaxy (IC)
ALEC	Authorized Linux Education Center (Linux, Caldera)
ALF	Accelerator Library and Framework (IBM)
ALG	Application Level Gateway (Balabit)
ALGOL	ALGOrithmic Language
ALIWEB	Archie Like Indexing in the WEB (WWW)
ALK	Automatisierte LiegenschaftsKarte (ALTIS)
ALLM	Auto Low Latency Mode (HDMI)
ALM	Application / Appware Loadable Module (Novell, Netware)
ALM	Application Lifecycle Management
ALM	Asynchronous Line Module
ALM	Asynchronous Line Multiplexer
ALOE	Apple Library for Object Embedding (Apple, OpenDoc)
ALP	Access Linux Platform (Linux, PDA, Palm)
ALP	Assembly Language Processor (IBM)
ALPA	Association de Lutte contre la Piraterie Audiovisuelle (org., France)
ALPC	Advanced Local Procedure Call
ALPN	Application-Layer Protocol Negotiation
ALR	Advanced Logic Research, inc (manufacturer)
ALS	Adjacent Link Station (IBM)
ALSA	Advanced Linux Sound Architecture (Linux, audio)
ALSI	Associazione nazionale Laureati in Scienze dell'informazione e Informatica (org., Italy)
ALTEL	Association of Long-distance TELephone companies (org., USA)
ALTERNIC	ALTERnative Network Information Center (Internet, USA)
ALTPSM	ALTernating Phase Shift Mask [lithography]
ALTS	Association for Local Telecommunications Services (org., USA)
ALU	Arithmetic and Logic Unit (CPU)
AM	Active Matrix (LCD)
AM	Amplitude Modulation
AM	Asynchronous Mode
AM	ante meridiem
AMA	Automatic Message Accounting
AMA	ask me anything
AMACS	AMA Collection System (AMA)
AMAP	As Much As Possible (telecommunication, Usenet, IRC)
AMARC	AMA Recording Center (AMA)
AMASE	AMA Standard Entry (AMA)
AMAT	AMA Transmitter (AMA)
AMATPS	AMA TeleProcessing System (AMA)
AMB	Advanced Memory Buffer (IC, RAM, FB-DIMM)
AMBA	Advanced Microcontroller Bus Architecture (ARM, AMBA)
AMBAAXI	Advanced Microcontroller Bus Architecture -Advanced eXtensible Interface (AMBA), "AMBA AXI"
AMC	Adaptive Modulation and Coding (UMTS, HSDPA, mobile-systems)
AMCD	Active Matrix Color Display (AMD, LCD)
AMCD	Activity Monitoring Completion Detection
AMD	Active Matrix Display (LCD)
AMD	Advanced MicroDevices [inc.] (manufacturer)
AMD	AutoMounterDAEMON (Macintosh, Apple)
AME	Advanced Metal Evaporated [tape] (Seagate, Streamer, Sony)
AME	Advanced Modeling Extension (carCAD)
AMEL	Active Matrix Electro Luminescent (AMD, LCD)
AMF	Action Message Format (Macromedia, Flash)
AMH	Automated Material Handling
AMHS	Automated Message Handling System (MHS)
AMI	ATM Management Interface (ForeRunner)
AMI	Alternate Mark Inversion [encoding] (ISDN, T1)
AMI	Amazon Machine Image (AWS)
AMI	American Megatrends Incorporation (manufacturer)
AMIA	American Medical Informatics Association (org., USA)
AMIA	Australian Medical Informatics Association (org., Australia)
AMIC	Apple Memory-mapped I/O Controller (Apple)
AMIC	Automotive Multimedia Interface Collaboration (USA, org.), "AMI-C"
AMIGADE	Amiga Digital Environment (Amiga), "AmigaDE"
AMIGOS	Advanced Mobile Integration in General Operating Systems
AMIS	Adaptive Multimedia Information System (DAISY)
AMIS	Audio Message Interface Standard
AML	ACPI Machine Language (ACPI, ASL, BIOS)
AML	Advanced Mobile Location
AMLCD	Active Matrix Liquid Crystal Display (AMD, LCD)
AMMA	Advanced Memory Management Architecture
AMME	Automated Multi-Media Exchange
AMNET	Allgemeines Mailbox NETzwerk (BBS, network)
AMOK	A Modular Operating Kernel (OS, Cray)
AMOL	a mountain of love
AMOLED	Active-Matrix Organic Light Emitting Diode (LED)
AMOR	Amusing Misuse of Resources (Linux, KDE)
AMOS	Alpha Microsystems Operating System (OS)
AMP	API Management Platform (API, Internet)
AMP	Accelerated Mobile Pages (Google)
AMP	Airwave Management Platform (Linux)
AMP	Asymmetric MultiProcessor [system] (SMP)
AMPE	Automated Message Processing Exchange
AMPS	Advanced Mobile Phone Service (mobile-systems, Motorola)
AMPSK	Amplitude Modulation with Phase Shift Keying, "AM/PSK"
AMR	Adaptive Multi-Rate
AMR	Audio MODEM Riser [slot] (Intel)
AMRWB	Adaptive Multi-Rate WideBand, "AMR-WB"
AMS	AUTODIN Mail Server (AUTODIN, mil., USA)
AMS	Advanced Monitor System (OS, DEC, PDP 9, PDP 15)
AMS	American Mathematical Society (org., USA)
AMS	Analog/Mixed Signals (IC)
AMS	Andrew Mail / Message System (Unix)
AMS	Asymmetric Multiprocessing System
AMSDOS	AMStrad Disk Operating System (Amstrad, OS), "AMS-DOS"
AMT	Active Management Technology (Intel)
AMT	Active Matrix Technology (AMD, LDC)
AMT	Apple Media Toolkit (Apple)
AMTC	Advanced Mask Technology Center (org., EuropeVL, Infineon, AMD, ...)
AMTF	Average Modulation Transfer Function
AMTFT	Active Matrix Thin Film Transistor (AMD, LCD, TFT)
AMTPE	Apple Media Tool Programming Environment (Apple), "AMT PE"
AMWG	Architecture Methodology Working Group (org., DISA)
AN	Access Node
AN	Alternating Network
ANAIS	Architecture Not Allowed In Source (Linux, Debian, slang)
ANAT	Alternative Network Address Types
ANBU	ANlagenBUchhaltung
ANC	Active Noice Canceling (audio)
ANCS	AT&T Netware Connect Services (AT&T, Netware)
ANDF	Architecture Neutral Distribution Format (OSF)
ANFSCD	And Now For Something Completely Different (slang, Usenet, IRC)
ANHR	Access Node Hub Router (AN)
ANI	Automatic Number Identification
ANI	Automatische Netzwerk Installation
ANIEL	Asociacion Nacional de Industrias Electronicas y de teLecomunicaciones (org., Spain, AETIC, predecessor)
ANMA	Apple Network Managers Association (org., Apple)
ANMP	Account Network Management Program
ANMP	Ad hoc Network Management Protocol
ANN	Artificial Neural Networks (NN)
ANO	Advanced Network Option (CA)
ANR	Access Node Router
ANR	Application Not Responding (Android)
ANS	Advanced Network & Services Inc. (IBM, MCI. Merit, NFSnet)
ANS	American National Standard (ANSI, ISO, USA)
ANSA	Advanced Networked Systems Architecture (ISA)
ANSI	American National Standard Institute (org., USA)
ANSN	Advertised Neighbor Sequence Number (OLSR)
ANSPAG	Advanced Network System Performance and Application Group (RDN-CRC)
ANT	Another Neat Tool (Java)
ANTC	Advanced Networking Test Center (org., USA, AMD, FDDI)
ANTLR	ANother Tool for Language Recognition, "Antlr"
ANTS	AT&T Novell Telephone Services (AT&T, Novell), "A/NTS" 
ANTS	Advanced .NET Testing System (.NET, Red-Gate)
ANUML	Australian National University Meta Language, "ANU ML" 
AO	Arvutikasutaja Oskustunnistus (Org, Estonia)
AOA	American Optometric Association (org., USA)
AOAC	Always On, Always Connected (NBS)
AOCD	Advice Of Charge, During the call
AOCE	Advice Of Charge, at the End of the call
AOCE	Apple Open Collaboration Environment (Apple)
AOCS	Attitude and Orbit Control System (ESA, Venus-Express)
AOD	Advanced Optical Disc (HD-DVD, predecessor)
AODI	Always On / Dynamic ISDN (ISDN, ACTEF), "AO/DI"
AOE	Application Operating Environment (AT&T)
AOI	Active Output Interface (UNI, PMD, FDDI)
AOL	Alert On LAN (LAN, Intel, IBM, BIOS), "AoL"
AOL	America OnLine (network, AOL)
AON	Active Optical Network
AOP	Aspect Orientated Programming
AOS	Advanced Operating System (OS)
AOS	Algebraic Operating System (IBM)
AOS	[LambdaRouter] All Optical Switch (Lucent, LambdaXtreme)
AOSP	Android Open Source Project (Android)
AOSS	Airstation One-touch Secure System (WLAN)
AOTC	Australian Overseas Telecommunications Corporation (org., Australia)
AOU	Arithmetic Output Unit
AOW	Asia and Oceania Workshop (OSI)
AP	Access Point (WLAN)
AP	Access Provider (ETSI, ETSI 201 671)
AP	Application Processor
AP	Auto Precharge (SDRAM)
AP	Automatic Pagination
APA	Adaptive Packet Assembly
APA	All Points Addressable
APA	Arithmetic Processing Accelerator
APACI	APache AutoConf-style Interface (HTTP, Apache)
APAR	Authorized Program Analysis Report (IBM)
APB	Advanced Peripheral Bus (AMBA, ARM)
APC	American Power Conversion (manufacturer, UPS)
APC	ArbeitsPlatz Computer (SNI)
APC	Association for Progressive Communications (org., network)
APCUG	Association of Personal Computer User Groups (org.)
APD	Additional Product Documentation
APDA	Apple Programmers and Developers Association (org., Apple)
APDPR	Advanced PDF Password Recovery (PDF)
APDU	Application Protocol Data Unit (OSI, PDU, OSI/RM, APDU, ICC)
APE	APplication Engineering
APE	Adaptable Persistence Engine (ZOPE)
APEL	A Portable EMACS Library (EMACS, GNU)
APEX	Advanced Packet EXchange
APF	Advanced Printer Function (IBM, ADT)
APFS	APple File System (Apple, FS)
API	Application Program Interface (API)
API	Associacao Portuguesa de Informatica (org., Portugal)
APIC	Advanced Programmable Interrupt Controller (Intel, PIC)
APIPA	Automatic Private IP Addressing (MS, IP)
APIS	Arbeitsdatei PIOS Innere Sicherheit (INPOL, PIOS)
APK	Android PacKage (Android)
APL	A Perspicuous Language / Alles Parallel Loesbar (APL, slang)
APL	A Programming Language (IBM)
APLSF	A Programming Language with Shared Files (CMU, DEC)
APLSF	A Programming Language with Shared Variables (IBM)
APLV	Arbeitsdatei PIOS LandesVerrat (INPOL, PIOS)
APM	Advanced Power Management
APM	Application Programming Model (J2EE)
APM	Automated Precision Manufacturing
APMS	Automated Program Management information System
APN	Access Point Name (GPRS, mobile-systems)
APNIC	Asian Pacific Network Information Center (org., Internet)
APO	Advanced Planner and Optimizer (SAP, SCM)
APOC	A Single Point Of Control (Sun, Linux)
APOK	Arbeitsdatei PIOS Organisierte Kriminalitaet (INPOL, PIOS)
APOP	Authenticated Post Office Protocol (Internet, POP, RFC 1734)
APP	Accelerated Parallel Processing (AMD)
APP	Application Portability Profile
APPC	Advanced Peer-to-Peer Communications (IBM, SNA, LU 6.2)
APPC	Advanced Program to Program Communication (IBM)
APPC	Application Program to Program Converter (IBM)
APPCM	Access Protection and Priority Control Mechanism (DQDB)
APPCP	Advanced Program to Program Communications Protocol (APPC, IBM)
APPEL	A P3P Preference Exchange Language (P3P)
APPI	Advanced Peer to Peer Internetworking (Cisco)
APPN	Advanced Peer to Peer Networking (IBM)
APPS	Application Packaging Problems & Solutions (Cygwin)
APR	Apache Portable Runtime (Apache)
APR	Arbeitsdatei PIOS Rauschgift (INPOL, PIOS)
APS	Active Pixel Sensor
APS	Application Page Server
APS	Application Service Provider (WAN)
APS	Asynchronous Protocol Specification
APSE	Ada Programming Support Environment
APSE	Agfa Publishing Systems Environment (Agfa, DTP)
APSL	Apple Public Source License (Apple)
APT	Address Pass Through
APT	Advanced Package Tool (Linux, Debian)
APT	Advanced Persistent Threat
APT	Advanced Photoscale Technology (Brother)
APT	Automatically Programmed Tools
APTC	Advanced Processor Temperature Control (Chaintech)
APTM	Application Program to Transaction Manager (TP)
APU	Accelerated Processing Unit (AMD, CPU, GPU)
APU	Auxiliary Processing Unit
APVE	[Parhelia] Audio, Photo, Video, Express (Matrox), "APVe"
APW	Arbeitsdatei PIOS Waffen (INPOL, PIOS)
APWG	Anti-Pishing Working Group (org.)
AQM	Active Queue Management
AR	Administrative Request [message] (LFAP)
AR	Aperture Ratio (DVD)
AR	Augmented Reality
ARA	Administrative Request Acknowledge [message] (LFAP)
ARA	Affiliate Registration Authority (RA, PKI, ITU)
ARA	Apple[talk] Remote Access (Apple, AppleTalk)
ARAG	AntiReflection AntiGlare (ViewSonic)
ARAP	Apple Remote Access Protocol (Apple, AppleTalk)
ARAT	Always Running APIC Timer (Intel, APIC)
ARB	Architecture Review Board (OpenGL, manufacturer, org.)
ARC	Advanced RISC Computing [architecture] (ACE, RISC)
ARC	App Runtime for Chrome (Google)
ARCA	Advanced RISC Computing Architecture (ACE, RISC)
ARCNET	Attached Resource Computer NETwork (Datapoint), "ARCnet" 
ARD	Apple Remote Desktop (Apple, Macintosh)
ARE	All Routes Explorer (ATM)
AREXX	Amiga Restructured EXtended eXecutor [language] (Amiga, Commodore, REXX)
ARG	Alternate Reality Game
ARIA	Accessible Rich Internet Applications (W3C, WAI)
ARIN	American Registry for Internet Numbers (org., Internet, USA)
ARKD	Abuse Resistant Key Distribution (Arcade)
ARL	Access Rights List (Banyan, VINES)
ARLL	Advanced Run-Length Limited [encoding]
ARM	Adobe Reader and acrobat Manager (Adobe)
ARM	Advanced RISC Machines (manufacturer, Acorn, Apple, VLSI, RISC)
ARM	Annotated [c++] Reference Manual
ARM	Application Response Measurement [working group]
ARM	Asynchronous Response Mode
ARMA	Association of Records Managers and Administrators, inc. (org.)
ARMS	Architecture for Reliable Managed Storage (Cheyenne)
ARMS	Automation Resources Management System
ARNS	Appletalk Remote Network Server (Apple, AppleTalk)
ARO	Affiliate Registration Organization (RA, PKI, ITU)
AROE	Allowed Restricted Operating Environment
AROM	Alterable Read Only Memory (ROM)
ARP	Address Resolution Protocol (Internet, RFC 826)
ARPA	Advanced Research Projects Agency [old term] (org., USA, DARPA)
ARPANET	Advanced Research Projects Agency NETwork (USA, network)
ARPDP	Association of Rehabilitation Programs in Data Processing (org., USA)
ARPG	Actionb Role Playing Game (RPG)
ARQ	Automatic Re-transmission reQuest (MODEM)
ARQAPDU	Associate ReQuest Application Protocol Data Unit (APDU)
ARRA	Announced Retransmission Random Access (MAC)
ARS	Action Request System
ARS	Automatic Route Selection (PBX, LCR)
ART	Adaptive Resonance Theory (NN)
ART	Advanced Resolution Technology (Minolta)
ARTS	Accelerated Ray-Tracing System (raytracing)
ARTS	Action Real-Time Strategy [game] (RTS)
ARTS	Asynchronous Remote Takeover Server
ARTT	Asynchronous Remote Takeover Terminal
AS	Advanced Server (MS, Windows NT)
AS	Authentication Service (DCE)
AS	Autonomous System (IP, Internet, RFC 1930)
AS	[Red Hat Enterprise Linux] Advanced Server (RedHat, Linux, RHEL)
AS400	Application System/400 (IBM), "AS/400"
ASA	Adaptive Security Appliance (Cisco)
ASA	Advanced SCSI Architecture (SCSI)
ASA	American Standards Association (org., USA, ANSI, predecessor)
ASAIC	as soon as I can
ASAP	Advanced Streaming and Prediction
ASAP	As Soon As Possible (slang, Usenet, IRC)
ASAP	Automatic Switching And Processing
ASAP	as soon as possible
ASB	Advanced System Bus (AMBA, ARM)
ASBR	Autonomous System Border / Boundary Router (AS)
ASC	Accredited Standards Committee (org., ANSI)
ASC	Additional Sense Code
ASC	American Society for Cybernetics (org., USA)
ASC	Authorized Support Center
ASC	Automatic Contrast Selection (FAX)
ASCC	Automatic Sequence Controlled Calculator (IBM)
ASCI	Accelerated Strategic Computing Initiative
ASCI	Agent to Server Communication Interval (McAfee, ePolicy)
ASCII	American Standard Code of Information Interchange
ASCSI	Advanced Small Computer Systems Interface (SCSI)
ASD	Architecture Summary Design
ASDR	Application Security Desk Reference (OWASP)
ASDSP	Application-Specific Digital Signal Processor
ASE	Active Storage Element (GigaB, IP-router)
ASE	Aladdin Smartcard Environment (Fast, Aladdin)
ASE	Amplified Spontaneous Emission (FO, EDFA)
ASE	Android Scripting Environment (Android)
ASE	Application Service Element (ATM)
ASEB	ASian EDIFACT Board (org., EDIFACT), "AS/EB"
ASEMH	Army Standards Electronic Mail Host (mil., USA)
ASES	Application Software Entity Security
ASES	Australian Solid Earth Simulator (ACES)
ASF	Advanced Streaming Format (MS)
ASF	Apache Software Foundation (org., Apache)
ASH	Almquist SHell (BSD, Unix, Shell), "ash"
ASHLI	Advanced Shading Language Interface (ATI)
ASI	Adapter Support Interface (IBM, LAN)
ASI	Advanced Switching Interconnect
ASI	Amorphous SIlicon drum (Kyocera), "aSI"
ASI	Aquarius Systems International (manufacturer)
ASI	Asynchronous SCSI Interface
ASI	Automatic System Installation
ASIC	Application Specific Integrated Circuit (IC, RL)
ASIM	Arbeitskreis Simulation und Kuenstliche Intelligenz (org., GI)
ASIO	Audio Stream Input/Output
ASIP	Application Specific Instruction-set Processor (IC)
ASIS	American Society for Information Science (org.)
ASISIG	Advanced Switching Interconnect Special Interest Group (org., SIG), "ASI SIG"
ASK	Akademische Software Kooperation (org., Karlsruhe, Germany)
ASK	Alexa Skill Kit (Amazon)
ASK	Amplitude Shift Keying
ASKSAM	Access Stored Knowledge via Symbolic Access Method (DB), "askSam"
ASL	ACPI Source Language (ACPI, AML)
ASL	Adaptive Speed Levelling (US Robotics)
ASL	Annotated Source Listing (Intel)
ASL	Astaro Security Linux (Linux)
ASL	age/sex/location
ASLR	Address Space Layout Randomization
ASLT	Advanced Solid Logic Technology (IC)
ASM	Advanced Server Management (Acer)
ASM	Association of Systems Management (org.)
ASM	Automatic Storage Management (DB, Oracle)
ASMA	Administratively Scoped IP Multicast (RFC 2365, Multicast)
ASMA	Asus System Monitoring Agent (Asus, ASWM)
ASMO	Advanced Storage Magneto Optical [disk] (Hitachi, Maxell, Matsushita, Fujitsu, Olympus, Philips, Sanyo, Sharp, Sony, LG Electronics)
ASMONIA	Angriffsanalyse und Schutzkonzepte fuer MObilfunkbasierte Netzinfrastrukturen unterstuetzt durch kooperativen InformationsAustausch
ASMP	ASymetric MultiProcessing [system]
ASMP	ASymmetrisches MultiProzessor [system]
ASN1	Abstract Syntax Notation One (OSI, ISO, IS 8824), "ASN.1"
ASNM	AdvanceStack Network Management (HP)
ASO	Address Supporting Organization (Internet)
ASP	Abstract Service Primitive (OSI)
ASP	Active Server Pages (HTTP, MS)
ASP	Advanced Signal Processing / Processor
ASP	Advanced Simple Profile
ASP	Appletalk Session Protocol (Apple, AppleTalk)
ASP	Application Service Provider / Providing (ISP, Internet)
ASP	Association of Shareware Professionals (org., USA)
ASP	Authorized Service Provider (Sun)
ASPEC	Advanced SPectre Entropy Coding (MPEG, Digital audio)
ASPEN	Automatic System for Performance Evaluation of the Network
ASPI	Advanced SCSI Programming Interface (Adaptec, API, SCSI)
ASPIC	Advanced SCSI Programmable Interrupt Controller (PIC, SCSI)
ASPIK	Algebraic Specifications and Implementations ??? (ISDV)
ASPL3	Advanced Simple Profile @@ Level 3 (MPEG, CIF), "ASP@@L3"
ASPP	Application Specific Programmable Product (ASIC, ASSP, FPGA, RL)
ASPS	Advanced Signal Processing System
ASQ	Automated Software Quality
ASQC	American Society of Quality Control (org., USA)
ASQF	Arbeitskreis Software-Qualitaet Franken [e.V.] Org., Germany
ASR	Automated System Recovery (MS, Windows, XP)
ASR	Automatic Server Restart (HP)
ASR	Automatic Speech Recognition
ASSERT	ADEPT Subsystem for Scanning of Electronic Received Traffic (ADEPT, mil., USA)
ASSIST	Automated Special Security Information System Terminal (mil., USA)
ASSP	Application Specific Standard Product (RL)
ASSPA	ASsociation Suisse pour l'Automatique (org., Switzerland)
ASSR	Agreed Set of Security Rules (mil., USA)
ASSUME	Association of Statistics Specialists Using Microsoft Excel (org., user group)
AST	Abstract Syntax Tree (GCC)
AST	Atlantic Standard Time [-0400] (TZ, ADT)
ASTA	Advanced Software Technology and Algorithms (HPCC)
ASTRAL	Alliance fuer Strategic Token Ring Advancement and Leadership (manufacturer)
ASU	Asynchron-Synchron Umsetzer
ASV	Adobe SVG Viewer (Adobe, SVG)
ASV	Advanced Super-View (LCD, Sharp, MVA)
ASVD	Analog Simultaneous Voice and Data (MODEM)
ASWF	Academy SoftWare Foundation (org.)
ASWM	Asus System Web-based Management (Asus, DMI, SNMP, ASMA)
AT	Advanced Technology (IBM, PC)
ATA	Advanced Technology Attachment (ATA, HDD)
ATA	Analog Telephone Adaptor (VoIP)
ATAG	Authoring Tool Accessibility Guidelines (WAI)
ATAP	ARM Technology Access Program (ARM)
ATAPI	Advanced Technology Attachment Packet Interface (ATA)
ATASPI	Advanced Technology Attachment Software Programming Interface (ATA)
ATC	Address Translation Cache (CPU)
ATC	Address Translation Controller (ATM)
ATC	Advanced Thermo Concept (Cooler-Master)
ATC	Authorized Testing Center (MS)
ATC	Automatic Transmission Control
ATCA	Advanced Telecommunications Computing Architecture (Intel, PICMG)
ATCA	Allied Tactical Communications Agency (org., NATO, mil.)
ATCP	[PPP] AppleTalk Control Protocol (Apple, AppleTalk, PPP, NCP, RFC 1378)
ATD	AntiTerrorDatei (INPOL)
ATD	Asynchronous Time Division (ATM)
ATDM	Asynchronous Time Division Multiplexer (ATD)
ATDMA	Asynchronous Time Division Multiple Access (ATD)
ATDP	ATtention Dial Pulse (MODEM)
ATDT	ATtention Dial Tone (MODEM)
ATE	ATM Terminating Equipment (SONET, ATM)
ATE	Asynchronous Terminal Emulation (Banyan, VINES)
ATEC	Authorized Training and Education Center (MS, MOCS, MCSD, ATEC)
ATEOTD	at the end of the day
ATES	Advanced Techniques integration into Efficient scientific Software (ESPRIT, CASE)
ATF	Automatic Track Finding (DDS)
ATH	ATtention Hang up (MODEM)
ATH	Absolute Threshold of Hearing (MP3)
ATI	Advanced Telecomunications Institute (org., USA)
ATI	Asociacion de Tecnicos de Informatica (org., Spain)
ATIP	Absolute Time In Pregroove (CD)
ATIS	Alliance for Telecommunications Industry Solutions (org., USA)
ATK	Andrew ToolKit (Unix)
ATKIS	Amtliches Topographisch-Kartographisches InformationsSystem
ATL	Activex Template Library (MS, ActiceX, MSVC)
ATL	Adaptive Threshold Learning (neural nets)
ATLAS	Automatically Tuned Linear Algebra Software (BLAS, API)
ATM	Abstract Test Method (ISO 9646-1)
ATM	Adobe Type Manager
ATM	Asynchronous Transfer Mode (ATM)
ATM	At The Moment (slang, Usenet, IRC)
ATM	Automatic Teller Machine
ATM	at the moment
ATM	{automated,automatic} teller machine
ATMARP	ATM Address Resolution Protocol (ATM, ARP)
ATMP	Ascend Tunnel Management Protocol (Ascend, RFC 2107)
ATMS	Assumption based Truth Maintenance System (AI)
ATN	Augmented Transition Network
ATOB	ASCII TO Binary (ASCII)
ATOMM	Advanced super Thinlayer and high-Output Metal Media (Fuji)
ATP	Advanced Technology Partner
ATP	Appletalk Transaction Protocol (Apple)
ATP	Application Transaction Program (IBM, APPC)
ATP	Available To Promise (SCM)
ATP	[Macromedia] Authorized Training Program (Macromedia)
ATP2	AppleTalk Phase 2 (Apple, AppleTalk)
ATPH	Authorized Teamspeak Host Provider
ATPS	AppleTalk Printing Services (AppleTalk, Apple)
ATR	Advanced Telecommunications Research laboratory (org., Japan)
ATR	Answer To Reset
ATR	Automatic Terminal Recognition
ATRAC	Adaptive TRansform Acoustic Coding (Sony, Digital audio, CODEC)
ATS	Abstract Test Suite
ATS	Adaptive Tape Speed (HP, Streamer, LTO)
ATS	Administrative Terminal System
ATS	Apple Terminal Services (Apple, AppleTalk)
ATSPI	Assistive Technology - Service Provider Interface (GNOME), "AT-SPI"
ATSUI	Apple Text Services for Unicode Imaging (Apple, Unicode)
ATT	American Telephone and Telegraph, "AT&T" 
ATUS	A Toolkit for Usable Security (Uni Freiburg)
ATVEF	Advanced TV Enhancement Forum (org.)
ATW	around the world
ATX	Advanced Technology eXtended [form factor]
AU	Access Unit
AUAI	Association for Uncertainty in Artificial Intelligence (org., AI)
AUC	AUthentication Center (GSM, mobile-systems), "AuC"
AUDIT	AUtomated Data Input Terminal
AUDIUS	AUssenDIenstUnterstuetzungsSystem (CAS)
AUE	Andrew User Environment (Unix)
AUGCE	Autodesk User Group Central Europe (org., user group)
AUGE	Apple User Group Europe (org., Apple, user group)
AUI	Access Unit Interface
AUI	Asociacion de Usuarios de Internet (Internet, user group, Spain, org.)
AUI	Attachment Unit Interface (ethernet)
AUI	Audible User Interface (UI)
AUIS	Andrew User Interface System (Unix, UI)
AUP	Acceptable Use Policy (NFSNet)
AUR	Arch User Repository (Linux)
AURP	Appletalk Update-based Routing Protocol (Apple, Appletalk, RFC 1504)
AUT	Application Under Test
AUTODIN	AUTOmatic DIgital Network (DMS, DISA)
AUTOKO	AUTOmatisiertes KOrpsstammnetz (Bundeswehr)
AUTOSAR	AUTomotive Open Systems Architecture [initiative] (org.)
AUTOSEVOCOM	AUTOmated SEcure VOice COMmunications (predecessor, SVIP, mil., USA)
AUTOVON	AUTOmatic VOice Network (predecessor, DSN, DISA)
AUU	ATM User-to-User (ATM)
AUX	Apple UniX (Apple, Unix), "A/UX" 
AUX	Auxiliary Power Unit (Airbus, A380)
AV	Audio/Video, "A/V"
AV	AudioVisual [macintosh] (Apple)
AVA	Audio-Visual Authoring
AVAS	teile-Auftragserfassungs-, Verwaltungs- und AbrufSystem (MBAG)
AVATAR	Advanced Video Attribute Terminal Assembler and Recreator (BBS)
AVC	Access Vector Cache
AVC	Advanced Video Coding (VCEG, video)
AVC	Audio-Visual Connection
AVCD	Audio-Visual Computer Display
AVD	Advanced Video Disk [old term] (China, EVD)
AVD	Alternation Voice/Data
AVD	Android Virtual Device (Android)
AVDL	Application Vulnerability Description Language (OASIS, XML)
AVE	AutoCAD Visualization Extension (carCAD)
AVERT	Anti-Virus Emergency Response Team (McAfee)
AVGA	Advanced Video Graphics Array (VGA)
AVI	Audio Video Interleaved (MS)
AVIS	AuftragsVerwaltungs- und InformationsSYstem (MBAG)
AVL	Adelson, Veslkij and Laudis [tree]
AVM	AudioVisuelles Marketing und computersysteme [gmbh] (manufacturer)
AVPD	Anchor Volume Descriptor Pointer (CD-R, UDF, ISO 9660)
AVR	Automatic Voice Recognition
AVR	Automatic Voltage Regulation (USV)
AVRCP	Audio Video Remote Control Profile (Bluuetooth)
AVS	Address Verification System
AVS	Adult Verification System (WWW)
AVS	Alexa Voice Services (Amazon, AWS)
AVX	Advanced Vector eXtensions (CPU, Intel)
AWA	Access-Web-Apps (MS)
AWAC	Audio Waveform Amplifier and Converter (Apple)
AWADO	Automatischer Wechselschalter in der AnschlussDose
AWD	Automatische Waehleinrichtung fuer Datenverbindungen
AWE	Address Windowing Extensions (API, PAE)
AWE	Autocad Windows Extension (carCAD)
AWG	American Wire Gauge (cable)
AWK	Aho, Weinberger, [and] Kernighan
AWK	al Aho, peter Weinberger, brian Kernighan (Unix)
AWL	AnWeisungsListe (DIN 19239)
AWOL	Absent WithOut Leave (telecommunication, Usenet, IRC)
AWOL	absent without official leave
AWP	Association of Web Professionals (org., WWW)
AWS	Amazon Web Services (XML, API, Amazon)
AWS	Apple Workgroup Server (Appletalk, Apple)
AWT	Abstract Window Toolkit (Java, Sun)
AWTAPI	Abstract Windows Toolkit-Application Programmer Interface (AWT, API, Java)
AXE	Application eXecution Environment
AXI	Advanced eXtensible Interface (ARM, AMBA)
AXIS	Apache eXtensible Interaction System (Apache, SOAP)
AYBABTU	all your base are belong to us
AYF	all your fault
AYOR	at your own risk
AYS	Are You Sure (slang, Usenet, IRC)
AYT	are you there
AZEB	Australian/new Zealand EDIFACT Board (org., EDIFACT), "AZ/EB"
B&	banned
B/C	because
B/W	bandwidth
B/W	between
B2B	Business to Business
B2C	Business to Customer
B2E	Business to Employee
B8ZS	Binary 8 Zero Suppression [encoding] (ISDN, T1)
BAARF	Battle Against Any RAID Five (HDD, RAID)
BAAS	Backend As A Service (MBAAS)
BAC	Basic Air Control (RFID)
BACNET	Building Automation and Control NETwork, "BACnet"
BACP	Bandwidth Allocation Control Protocol (BAP, RFC 2125)
BAD	Broken As Designed (slang)
BADW	Bayerische Akademie Der Wissenschaften (org.)
BAGEL	Bay Area GNU Enthusiasts League (GNU, org., user group)
BAI	Basic Access Interface (ISDN)
BAI	goodbye
BAK	back at keyboard
BALUN	BALanced-UNbalanced [adapter] (cable), "Balun"
BAM	Bidirectional Associative Memory (neural nets)
BAM	Block-Availability-Map
BAM	Bundesanstalt fuer Materialpruefung (org., Berlin, Germany)
BAMP	BSD, Apache, MySQL, PHP (BSD, Apache, PHP, DB)
BAP	[PPP] Bandwidth Allocation Protocol (PPP, RFC 2125, BACP)
BAPC	[PPP] Bandwidth Allocation Control Protocol (PPP, BAP, RFC 2125)
BAPCO	Business Application Performance COrporation (benchmark, org., Compaq, Dell, HP, IBM, MS, Lotus, Intel, ...), "BAPCo"
BAPI	Biometric Application Program Interface (API, MS, ...)
BAPI	Business Application Programmer's Interface (SAP, R/3, API)
BAPT	BundesAmt fuer Post und Telefon (org.)
BAR	Base Address Register (IC)
BARB	Bluetooth Architecture Review Board (org., Bluetooth)
BARRNET	Bay Area Regional Research NETwork (network), "BARRNet"
BART	Basic Application RunTime (OS/2, IBM)
BARWAN	Bay Area Research Wireless Access Network (network, USA)
BAS	Basic Activity Subset
BASE	Basically Available, Soft state, Eventual consistency
BASH	Bourne-Again SHell (Unix, Shell)
BASIC	Beginner's All-purpose Symbolic Instruction Code
BASIN	Bundesweites Alternatives Studentisches InformationsNetzwerk (WWW, org.)
BAT	Baby Advanced Technology [board] (AT)
BAT	Basic Attention Token (Brave)
BAT	Bouquet Association Table (DVB)
BAT	Browser-based Application Toolkit (IBM, WWW)
BATV	Bounce Address Tag Validation (SMTP)
BAYSIS	BAY networks' Switched Internetworking Services, "BaySIS"
BB	BridgeBoard (Amiga, Commodore)
BBA	Big Brother Awards (telecommunication, Internet)
BBC	Broadband Bearer Capability (B-ISDN)
BBIAB	[I'll] Be Back In A Bit (telecommunication, Usenet, IRC)
BBIAB	be back in a bit
BBIAM	Be Back In A Minute (slang, Usenet, IRC)
BBIAS	Bye, Back In A Second (slang, Usenet, IRC)
BBL	Be Back Later (slang, Usenet, IRC)
BBL	[I'll] be back later
BBN	Bolt, Beranek and Newman (manufacturer)
BBNS	BroadBand Network Services
BBR	Back Bone Ring
BBR	burnt beyond repair
BBS	Bulletin Board System (telecommunication)
BBS	be back soon
BBT	be back tomorrow
BCAM	Basic Communication Access Method
BCBDS	Broadband Connectionless Data Bearer Service (B-ISDN)
BCC	Base Communications-computer Center (mil., USA)
BCC	Blind Carbon Copy (telecommunication)
BCC	Block Check Character
BCCH	Broadcast Control CHannel (GSM, mobile-systems)
BCD	Binary Coded Decimal
BCDBS	Broadband Connectionless Data Bearer Service (ATM)
BCDIC	Binary Coded Decimal Interchange Code
BCDMA	Broadband Code Division Multiple Access (Interdigital, SNI, Samsung), "B-CDMA"
BCF	Base station Control Function (BS, BTS, GSM, mobile-systems)
BCI	Batibus Club International (org.)
BCI	Brain Computer Interface
BCI	ByteCode Interpreter (TrueType, OpenType)
BCM	Basic Control Monitor (OS, Xerox, Xerox 530)
BCN	Backbone Concentrator Node (Wellfleet)
BCNU	be seeing you
BCNUL8R	be seeing you later
BCOB	Broadband Class of Bearer (B-ISDN)
BCP	Basic Call Process (IN)
BCP	Binary Communications Protocol
BCP	Binary Control Protocol (Adobe, PS)
BCP	[Internet] Best Current Practice (Internet, RFC)
BCP	[PPP] Bridging Control Protocol (PPP, RFC 1638)
BCP	best current practice
BCPL	Basic / BBN Combined Programming Language (BBN)
BCRFS	Bell System Reference Frequency Standard
BCS	Banking Communication Standard (banking)
BCS	Basic Combined Subset
BCS	Basic Control System (OS, HP, HP 2100)
BCS	Binary Compatibility Standard (Motorola)
BCS	Block Check Sequenz (GPRS, GSM, mobile-systems)
BCS	British Computer Society (org., UK)
BCSM	Basic Call State Model (IN)
BCU	Bus Controller Unit
BCV	Business Continuance Volumes (EMC)
BD	Blu-ray Disk (BD, Sony, Panasonic, TDK)
BDA	BIOS Data Area (BIOS)
BDA	Borland DAtabase (Borland, DB)
BDA	BundesDatenAutobahn [e.v] (org., ISP)
BDAM	Basic Direct Access Method (DAM)
BDB	Berkely DataBase (DB)
BDC	Backup Domain Controller (MS, Windows NT, PDC)
BDD	Binary Decision Diagram
BDD	Business Desktop Deployment (MS, Windows, Vista)
BDE	BetriebsDatenErfassung
BDE	Bit-lock Drive Encryption (MS, WPE)
BDE	Borland Database Engine (Borland, Delphi, DB)
BDF	Bitmap Description / Display Format (Adobe, Fonts)
BDJ	Blu-ray Disc Java (BD, Java, J2ME), "BD-J"
BDK	[java]Beans Development Kit (Java)
BDOS	Basic Disk Operating System (CP/M)
BDPA	Blu-ray Disk Pure Audio (Universal, BD, audio)
BDPP	Biometric Device Protection Profile (UK, CESG)
BDR	Blu-ray Disk - Recordable (BD), "BD-R"
BDR	Bus Device Request (SCSI)
BDRE	Blu-ray Disk - REwritable (BD), "BD-RE"
BDROM	Blu-ray Disk - Read Only Memory (BD), "BD-ROM"
BDSG	BundesDatenSchutzGesetz Germany
BDSL	Boundary Scan Description Language (JTAG, VHDL, IEEE 1149.1-2001)
BDTI	Berkeley Design Technology, Inc. (manufacturer), "BDTi"
BEAST	Browser Exploit Against SSL/TLS (SSL, TLS)
BEAT	Best Enhanced Advanced Technology (Trident, AT)
BEB	Binary Exponential Backoff (CSMA/CD, LIB)
BEC	Back-End-Chip (DVR)
BECEEP	BErlin Continuing Engineering Education Program, "BeCEEP"
BECN	Backward Explicit Congestion Notification (ATM)
BED	Bookmark Exploring Dabbler (VRML)
BEDO	Burst EDO [DRAM] (EDO, RAM, DRAM, IC, Micron)
BEDODRAM	Burst Extended Data Out DRAM (RAM, DRAM, IC), "BEDO-DRAM"
BEEP	Blocks Extensible Exchange Protocol (RFC 3080)
BEEV	Bundesverband der Elektronik- und ElektroschrottVerwerter (org.)
BEF	Brightness Enhancement Foile (LCD)
BELLCORE	BELL COmmunications REsearch (org., USA), "Bellcore"
BEN	BEstaetigungsNummer (banking)
BEOS	Be Operating System (OS), "BeOS"
BER	Basic Encoding Rules [for ASN.1] (ASN.1, OSI, ISO, IS 8825)
BER	Bit Error Rate (BIT)
BEREC	Body of European Regulators for Electronic Communications (org., Europe)
BERKOM	BERliner KOMmunikationssystem (network)
BERT	Bit Error Rate Test (BIT)
BES	Block Ended by Symbol (IBM, assembler)
BES	Bursty Errored Seconds (DS1/E1)
BEST	Borland Enhanced Support and Training (Borland)
BEST	Business Executive System for Timesharing (OS, Qantel)
BEVU	Bundesvereinigung mittelstaendischer Elektro- und elektronikgeraete entsorgungs- und VerwertungsUnternehmen Org., Germany
BEW	Business Engineering Workbench (R/3, SAP)
BF	Bus Fraction [pin] (Intel, Pentium, CPU)
BF	best friend
BF	boyfriend
BFD	Binary File Descriptor (Unix)
BFDI	Bundesbeauftragter Fuer den Datenschutz und die Informationsfreiheit Germany, "BfDI"
BFF	best {friend,friends} forever
BFGD	Big Format Gaming Display
BFN	Bye For Now (slang, IRC, Usenet)
BFOC	Bayonet Fiber Optic Connector
BFR	Brominated Flame Retardant
BFS	Be File System (BeOS, FS)
BFT	Binary File Transfer (telecommunication)
BGA	Ball Grid Array (IC, CPU)
BGI	Borland Graphics Interface (Borland)
BGP	Border Gateway Protocol (RFC 1267/1771, IP)
BGT	Broadcast and Group Translators
BHCA	Busy Hour Call Attempts
BHLI	Broadband High Layer Information, "B-HLI" 
BHN	Bayerisches Hochschulnetz (network)
BHO	Browser Helper Objects (MS, IE)
BHT	Branch History Table (CPU)
BI	Breidbart-Index (Usenet, ECP, EMP)
BIAB	Back In A Bit (telecommunication, Usenet, IRC)
BIAB	back in a bit
BIAF	back in a few
BIALW	back in a little while
BIAS	back in a second
BIAW	back in a while
BIB	Bild in Bild (PIP, video)
BIB	Bus Interface Board
BIC	Bank Identifier Code (banking)
BIC	Bit Independence Criterion (cryptography, BIT)
BIC	Bus Interface Chip (DVR)
BICI	Broadband InterCarrier Interface (B-ISDN), "B-ICI" 
BID	Bugtraq IDentification (Securityfocus)
BIDCO	BIDirectional COmmunication Standard, BidCoS
BIDI	BIDirectional
BIDI	boy, I did it
BIDS	Borland International Data Structures (Borland)
BIF	Benchmark Interchange Format (PLB)
BIF	Built In Function (REXX)
BIG	Bionet Intelligent Gateway (BioData)
BIGFON	Breitbandiges Integriertes Glasfaser-Fernmelde-OrtsNetz
BIGSTAF	Breitbandiges Integriertes GefechtsSTAndFernmeldenetz (Bundeswehr)
BIICS	Business Integration - Information Conformance Statements (XML), "BI-ICS"
BIK	Barrierefrei Informieren und Kommunizieren (Internet)
BIKA	Barrierefreie Informations- und Kommunikationstechnologie fuer Alle (FIT)
BIKOS	BueroInformations- und KOmmunikationsSysteme (org., GI)
BIM	Broadband Interface Module
BIMA	British Interactive Multimedia Association (org., UK)
BIND	Berkeley Internet Name Domain [software] (Unix)
BIOS	Basic Input Output System / Support (PC)
BIP	Bit Interleaved Parity (SONET, ..., BIT)
BIPV	Bit Interleaved Parity Violation (BIT)
BIRA	Belgian Institute for Automatic Control (org., Belgium)
BIS	Business Information System
BISDN	Broadband Integrated Services Digital Network (ATM), "B-ISDN" 
BISP	Business Information System Program
BISSI	Broadband Inter-Switching System Interface (B-ISDN), "B-ISSI" 
BIST	Built-In Self Test (Power4, IBM)
BISUP	Broadband ISDN User's Part (B-ISDN), "B-ISUP"
BISYNC	Binary SYNchronous Communications (IBM)
BIT	Basic Interconnection Test (ISO 9646-1)
BIT	Binary digIT
BITNET	Because It's Time NETwork (network)
BITS	Background Intelligent Transfer Service (MS, Windows)
BITV	Barrierefreie InformationsTechnik Verordnung Germany, WCAG
BIU	Bundesverband Interaktive Unterhaltungssoftware [e.V.] Org., Germany
BIU	Bus Interface Unit
BIX	Byte Information eXchange
BJT	Bipolar Junction Transistor (IC)
BK	Buero Kommunikation
BKS	BenutzerKoordinatenSystem (CAD)
BL	Blue Lightning [processor family] (Intel)
BLADE	Basic Linear Algebra for Distributed Environments
BLAS	Basic Linear Algebra Subroutines (Intel, API)
BLAST	BLocked ASynchronous Transmission
BLAST	Bell Labs Layered Space Time
BLE	Bluetooth 4.0 Low Energy (Bluetooth)
BLER	BLock Error Rate (CD)
BLERA	BLock Error Rate After [recording] (DVD), "BLERa"
BLERB	BLock Error Rate Before [recording] (DVD), "BLERb"
BLLI	Broadband Low Layer Information (BISDN), "B-LLI" 
BLM	Bayerische Landeszentrale fuer neue Medien (org.)
BLMX	Board-Level Multitasking eXecutive (OS)
BLOB	Binary Large OBject
BLOROB	BLOck based ROBot
BLSM	Base Level System Modernization
BLT	BLock Transfer
BLW	Bus Locked Write (Intel, CPU)
BMBF	BundesMinisterium fuer Bildung und Forschung (org.)
BMBW	BundesMinisterium fuer Bildung und Wissenschaft (org.)
BMC	Baseboard Management Controller (IPMI, BMC)
BMDP	Bio-Medical Data Package
BMECAT	Bundesverband Materialwirtschaft, Einkauf und Logistik CATalog data exchange format (XML), "BMEcat"
BMFT	BundesMinisterium fuer Forschung und Technik (org.)
BML	Bean Markup Language (Java)
BML	Business Management Layer (TMN)
BMOS	Bipolar Metal Oxide Semiconductor (IC)
BMP	Basic Multilingual Plane (UCS)
BMP	Bean Managed Persistence (Java, EJB, CMP)
BMS	Basic Mapping Support (CICS)
BMS	Basic Monitor System (OS, DEC, PDP 9, PDP 15)
BMS	Broadcast Message Server (PCTE)
BMT	Biel Mean Time (TZ, Internet)
BMTA	Backbone Message Transfer Agent (MTA)
BMUG	Berkeley Macintosh User Group (org., Apple, USA, user group)
BMWI	BundesMinisterium fuer WIssenschaft und technologie (org.)
BN	Bridge Number
BNC	Baby N Connector (slang)
BNC	Bayonet Neill Concelman [connector]
BNC	Bayonet Nipple Connector (slang)
BNC	Bayonet Nut Coupling
BNC	British National Connector
BNC	British Naval Connector
BND	BundesNachrichtenDienst
BNEP	Bluetooth Network Encapsulation Protocol (Bluetooth)
BNF	Backus-Naur Form (TTCN, ...)
BNG	Broadband Network Gateway
BNP	Broadband Network Premises
BNT	Broadband Network Termination (B-ISDN), "B-NT"
BNU	Basic Networking Utilities (AT&T)
BNYA	burned now you are
BO	Back Orifice (CDC)
BOA	Basic Object Adapter
BOC	but of course
BOCA	Borland Object Component Architecture (Borland)
BOCA	Business Object Component Architecture (CORBA, OMG)
BOD	Business Object Documents (OAG)
BOF	Birds Of a Feather (Usenix)
BOFH	Bastard Operator From Hell (slang)
BOFH	bastard operator from hell
BOINC	Berkeley Open Infrastructure for Network Computing
BOM	Beginning of Message
BOM	Byte Order Mark (Unicode)
BONDING	Bandwidth ON Demand INteroperability Group (org., manufacturer, AIM)
BOOTP	BOOTstrap Protocol (RFC 951)
BOPS	Billion Operations Per Second
BORE	Break Once Run Everywhere
BORSCHT	Battery, Overvoltage, Ringing, Signalling, Coding, Hybrid, Testing [functions] (PBX)
BOS	Basic Operating System (AIX, IBM)
BOS	Basic Overseer Server (AFS)
BOS	Batch Operating System (OS, Honeywell)
BOS360	Basic Operating System / 360 (OS, S/360, IBM), "BOS/360"
BOS5	Business Operating Software /5 (OS), "BOS/5"
BOSH	Bytestreams Over Synchronous HTTP (HTTP)
BOSS	BSI OSS Security Suite (BSI, OSS)
BOSS	Basic OS Software for BASIC (OS, BASIC)
BOSS	Bus Owner/Supervisor/Selector (FireWire)
BOT	Back On Topic (slang, Usenet, IRC)
BOT	Beginning Of Tape
BOT	Broadcast Online TV
BOT	Build, Operate and Transfer (networke)
BOT	Bulk Only Transfer
BOT	back on topic
BP	Base Pointer [register] (CPU, Intel, assembler)
BP	Behind Paywall; Didn't Read (slang, Usenet, IRC)
BPB	BIOS Parameter Block (BIOS, DOS, HDD, FDD)
BPC	Broadcast Personal Computer (PC)
BPD	BankParameterDaten (DDBAC)
BPDR	Behind Paywall; Didn't Read (slang, Usenet, IRC)
BPDU	Bridge Protocol Data Unit (PDU)
BPEL	Business Process Execution Language
BPEL4WS	Business Process Execution Language for Web Services (XML, XSD, SOAP, WSDL, OASIS)
BPF	Berkeley Packet Filter (BSD, Unix)
BPI	Bits Per Inch (HDD, BIT)
BPIP	Best Play for Imperfect Player (NEC)
BPL	Business Process Language
BPL	Bytes Per Line
BPM	beam propagation method
BPM	beats per minute
BPMN	Business Process Modeling Notation
BPN	Back-Propagation Net (NN)
BPOS	Business Productivity Online Suite (MS)
BPP	Bits Per Pixel (BIT)
BPP	Bridge Port Pair
BPS	Bits Per Second (MODEM, BIT)
BPSK	Bi-Phase Shift Keying [modulation] (HiperLAN/2, , 802.11a)
BPSS	Business Process Specification Schema (ebXML, XML)
BPU	Branch Prediction Unit (CPU, MMX, Intel)
BPU	Branch Processing Unit (CPU)
BPV	BiPolar Violation [error event] (DS1/E1, DS3/E3)
BR	Boundary Representation (CAD, CAM)
BRAIN	Berlin Research Area Information Network (network)
BRAIN	Brain Research through Advancing Innovative Neurotechnologies (USA)
BRAIN	Broadband Radio Access for IP-based Networks
BRAM	Broadcast Recognition Access Method (MAC)
BRAN	Broadband Radio Access Network (ETSI, WLAN)
BRAP	Broadcast Recognition with Alternating Priorities (MAC)
BRAS	Broadband Remote Acess Server (ISP, DSL)
BRB	Be Right Back (slang, Usenet, IRC)
BRB	[I'll] be right back
BREW	Binary Runtime Environment for Wireless (CDMA, Oualcomm)
BRF	Benchmark Reporting Format (PLB)
BRI	Basic Rate Interface (ISDN)
BRI	Bridge Router Interface ??? (Banyan, VINES)
BRIEF	Basic Reconfigurable Interactive Editing Facility
BRIL	Bus Read Invalidate Line (Intel, CPU, BWIL)
BRIM	Bridge/Router Interface Module
BRL	Bus Read Line (Intel, CPU, BWL)
BRMS	Backup Recovery and Media Services (IBM)
BRS	Big Red Switch
BRT	Browser Response Time (WWW)
BRTB	Berlin Regional TestBed (WIN)
BS	BackSpace
BS	BackSpace one record (IBM, VM/ESA, CP)
BS	Banded Signaling
BS	Base Station (LA, GSM, mobile-systems)
BS	BetriebsSystem
BS2000	BetriebsSystem 2000 (SNI, OS)
BSA	Backbone Service Area
BSA	Business Software Alliance (org., manufacturer)
BSAM	Basic Sequential Access Method (IBM, MVS, SAM)
BSC	Balanced ScoreCard
BSC	Base Station Controller (BS, BTS, GSM, GPRS, UMTS, mobile-systems)
BSC	Binary Synchronous Coded
BSC	Binary Synchronous Communications [protocol] (IBM)
BSCM	Binary Synchronous Communications Module
BSD	Berkeley System / Software Distribution (manufacturer, Unix, OS)
BSD	Blind Spot Detection (car)
BSD	booze, sex, drugs
BSDI	Berkeley Software Design Incorporated (manufacturer)
BSDL	Berkeley/San Diego License
BSI	Bentley Systems, Incorporated (manufacturer)
BSI	British Standards Institute (org., UK)
BSI	Bundesamt fuer Sicherheit in der Informationstechnik Org., Germany
BSIC	Base Station Identification Code (BS, BCCH, GSM, mobile-systems)
BSMTP	Batched Simple Mail Transfer Protocol (SMTP)
BSP	BetriebsSystemProzessor (Windows NT, SMP)
BSP	Binary Space Partitioning [tree]
BSP	Bug Squashing Party (Linux, Debian)
BSR	BootStrap Router (PIM, RP, Multicast)
BSR	Boundary-Scan-Register (JTAG, TAP, IC)
BSS	Base Station System / Subsystem (GPRS, BSC, BTS)
BSS	Basic Service Set (WLAN)
BSS	Basic Synchronized Subset
BSS	Block Started by Symbol (IBM, assembler, Unix)
BSS	Block Storage Segment
BSS	Broadband Switching System
BSSMAP	Base Station System Management Application Part (RR, BS, MTP, GSM, mobile-systems)
BST	Bering Strait Time [-1100] (TZ)
BST	Brazil Standard Time [-0300] (TZ)
BST	British Summer Time [+0100] (TZ, UK)
BSVC	Broadcast Switched Virtual Connections (ATM)
BT	Baghdad Time [+0200] (TZ)
BT	Bering Time [-1100] (TZ)
BT	BlueTooth
BT	British Telecom (org.)
BT	Burst Tolerance
BT	Bus Terminator
BTAM	Basic Tape Access Method (BS2000)
BTAM	Basic Telecommunications Access Method (IBM)
BTB	Branch Target Buffer (CPU)
BTC	Biting The Carpet (slang, Usenet)
BTC	Block Turbo Codes (WIMAX, 802.16e)
BTDT	Been There, Done That (slang, Linux, Kernel)
BTDT	been there, done that
BTE	Broadband Terminal Equipment (B-ISDN), "B-TE"
BTFT	been there, fixed that
BTH	Base Transport Header (Infiniband)
BTI	Branch Target Injection (CPU)
BTL	Bell Telephone Laboratories
BTLB	Block Translation Look-aside Buffer (CPU)
BTLE	BlueTooth Low Energy (Bluetooth), "BT LE"
BTM	Batch Time-sharing Monitor (OS)
BTM	Benchmark Timing Methodology (PLB)
BTNS	Better-Than-Nothing Security (IETF, WG)
BTO	Build-To-Order
BTOA	Binary TO ASCII (ASCII)
BTP	Business Transaction Protocol (OASIS)
BTRFS	BTRee Files System (Linux, FS), "btrfs"
BTRON	Business TRON (TRON)
BTS	Base Transceiver Station entities (BCF, BS, GSM, GPRS, UMTS, mobile-systems)
BTS	Branch Tree Store (Intel, CPU)
BTS	Bug Tracking System
BTTH	boot to the head
BTU	Basic Transmission Unit (IBM, SNA)
BTW	By The Way (slang, Usenet, IRC)
BTW	by the way
BTX	Balanced Technology eXtended [form factor] (AT, ATX)
BTX	BildschirmTeXt (network, Datex-J, DTAG), "Btx"
BTXVST	BildschirmTeXt-VermittlungsSTelle (BTX), "Btx-VSt"
BUGLAS	BUndesverband GLASfaseranschluss e.v. (org.)
BUI	Bus Interface Unit (DEC)
BUP	Buffer Underrun Protection (DVD, CD)
BUS	Broadcast and Unknown Server (ATM, LANE)
BV	BildVerarbeitung
BVB	Besondere VertragsBedingungen
BVB	BundesVerband fuer Buero- und informationssysteme [e.v.] (org.)
BVCP	[PPP] Banyan VINES Control Protocol (RFC 1763, Banyan, VINES, PPP)
BVDW	BundesVerband Digitale Wirtschaft [e.V.] (org., Germany)
BVIT	BundesVerband InformationsTechnologien [e.v.] (org.)
BVSI	Berufsverband de Selbststaendigen in der Informatik [e.V.] Org., Germany
BW	Business Warehouse (DWH)
BWAM	Because We Are Mean (slang, Cygwin)
BWBM	Bandwidth Balancing Mechanism (DQDB)
BWCC	Borland Windows Custom Controls (Borland, DLL)
BWF	Broadcast Wave Format (DCI)
BWIL	Bus Write Invalidate Line (Intel, CPU, BRIL)
BWL	Bus Write Line (IIntel, CPU, BRL)
BYOB	bring your own {beer,booze}
BYOD	Bring Your Own Device
BZR	BefehlsZaehlRegister (IC)
BZR	Bit Zone Recording (ROD, BIT)
BZR	BundesZentralRegister (IC)
BZT	Bundesamt fuer Zulassungen in der Telekommunikation (org., DTAG)
BZUE	Beleglose ZahlscheinUEberweisung (banking)
C	Command & Control [server]
C128	Commodore 128 [computer] (Commodore)
C2DM	Cloud to Device Messaging (Google)
C2IS	Command and Control Information Systems (mil., USA)
C3I	Command, Control, Communications and Intelligence (mil., USA)
C3IIS	Command, Control, Communications and Intelligence Information Systems (mil., USA), "C3I/IS"
C4	Command, Control, Communications and Computers (mil., USA)
C4I	Command, Control, Communications, Computers and Intelligence (mil., USA)
C64	Commodore 64 [computer] (Commodore)
CA	Carrier Aggregation
CA	Cell Arrival (ATM)
CA	Certification Authority (cryptography, PKI)
CA	Channel Adapter (Infiniband)
CA	Computer Animation
CA	Computer Associates (manufacturer)
CAA	Certification Authority Authorization (DNS, RFC 6844)
CAAD	Computer Aided Architectural Design
CAAS	Container As A Service, "CaaS"
CAB	Contextual Action Bar (Android)
CABAC	Context Based Adaptive Binary Arithmetic Coding (AVC)
CABC	Content Adaptive Brightness Control (Dell)
CABS	Carrier Access Billing System
CABS	Computer Aided Business Simulation
CAC	Cantilver Array Chip (IBM, HDD, MEMS)
CAC	Channel Access Code (Bluetooth)
CAC	Computer Aided Crime
CAC	Connection Admission Control (UNI, ATM)
CACEAS	Computer-Assisted Circuit Engineering and Allocating System
CACTIS	Community Automated Counter-Terrorism Intelligence System (mil., USA)
CAD	Computer Aided Design (CIM)
CAD	Computer Aided Dispatch / Drafting
CADE	Computer Aided Document Engineering (Microstar)
CADR	Client Authenticated DNS Request (DNS, Internet)
CADS	Computer-Assisted Display System
CAE	Client Application Enabler (IBM, DB)
CAE	Common Application Environment (X/Open)
CAE	Computer Aided Education
CAE	Computer Aided Engineering (CIM)
CAI	Computer Aided Inspection (CIM)
CAI	Computer Aided Instruction
CAIDA	Center for Applied Internet Data Analysis (org.)
CAIP	Computer Analysis of Images and Patterns (Konferenz)
CAIS	Common APSE Interface Specification (APSE, API)
CAIT	Center for the Application of Information Technology (org., USA)
CAIT	Central Academy of Information Technology (org., MITI)
CAL	Client Access License (Lotus, MS)
CAL	Computer Aided Logistics
CAL	Computer Assisted Learning
CAL	Conversational Algebraic Language (JOSS)
CAL	Cryptographic Autonomy License
CALEA	Communications Assistance Law Enforcement Act (USA)
CALS	Computer aided Acquisition and Logistics Support
CALS	Continuous Acquisition and Life-cycle Support
CAM	Common Access Method (SCSI)
CAM	Computer Aided Manufacturing
CAM	Conditional Access Modul (DVB, CI)
CAM	Content Addressable Memory (ethernet, Switch, IC)
CAMAC	Computer Automated Measurement And Control
CAMEL	Customized Applications for Mobile network Enhanced Logic (UMTS)
CAML	Categorical Abstract Machine Language (INRIA), "Caml"
CAML	Collaborative Application Markup Language (MS, XML)
CAMM	Computer Assisted Material Management
CAMP	Cygwin Apache MySQL PHP (Cygwin, Apache, SQL, PHP)
CAN	Complete Area Networks (SNI)
CAN	Controller Area Network [bus] (CAN)
CAO	Client Activated Object (SAO)
CAO	Computer Aided Office
CAO	Control Area Operator (EMS)
CAP	CAMEL Application Part (SS7, CAMEL)
CAP	Carrierless Amplitude Phase [modulation] (ADSL, AT&T)
CAP	Common Alerting Protocol (XML, OASIS)
CAP	Communications-electronics Accommodation Program
CAP	Component Approval Process
CAP	Computer Aided Planning (CIM)
CAP	Computer Aided Publishing
CAP	Consistency, Availability, Partition tolerance
CAP	Cross Account Protection (Google)
CAPE	Computer Applications in Production and Engineering (conference, IFIP)
CAPEC	Common Attack Pattern Enumeration and Classification
CAPI	Coherent Accelerator Processor Interface (NVidia)
CAPI	Communication Application Program Interface (ISDN, API)
CAPI	Cryptography Application Programming Interface (cryptography, API)
CAPP	Computer Aided Process Planning
CAPPEAL	Controlled Access Protection Profile / Evaluation Assurance Level, "CAPP/EAL"
CAPSL	CAnnon Printing System Language (Canon), "CaPSL"
CAPT	Cannon Advanced Printing Technology
CAPTCHA	Completely Automated Public Turing test to tell Computers from Humans Apart (AI)
CAPWAP	Control and Provisioning of Wireless Access Points (WAP)
CAQ	Computer Aided Quality [control]
CAR	Central Access Routing (RND)
CAR	Computer Aided Retrieval
CAR	Computer Assisted Radiology
CAR	Contents of the Address Register (IBM, ELISP, CDR)
CARCAS	Computer Aided aRchiving and Change Accounting System
CARD	Candidate Access Router Discovery (RFC 4066)
CARDS	Central Archive for Reusable Defense Software (mil., USA)
CARDVM	Card Virtual Machine (Java, Sun), "CardVM"
CARE	Computer Assistance Resource Exchange
CARLOS	Computer Aided Real Language Orthographic System
CARP	Common Address Redundancy Protocol (BSD)
CAS	Code Access Security (VSTO, .NET, MS)
CAS	Column Address Strobe (IC, DRAM)
CAS	Communicating Applications Specification (FAX, Intel, DCA)
CAS	Computer Aided Selling
CAS	Computer Aided Styling
CAS	Computer Algebra System
CAS	Computerized Autodial System
CAS	Content Addressed Storage (EMC)
CASE	Common Application Service Element (ISO, OSI)
CASE	Computer Aided Software Engineering
CASH	Computer Aided Service Handling (Ashton-Tate), "C.A.S.H."
CASID	Condition Access System IDentification (DVB, CAT)
CAST	Carlisle Adams and Stafford Tavares (cryptography)
CAST	Computer Aided Software Testing
CAT	Cache Allocation Technology (Intel)
CAT	Central Alaska Time [-1000] (TZ)
CAT	Common Authentication Technology (IETF, RFC 1511)
CAT	Computer Aided Technology (fair)
CAT	Computer Aided Telephony
CAT	Computer Aided Testing
CAT	Condition Access Table (DVB)
CATI	Computer Aided / Assisted Telephone Interviewing
CATIA	Computer Aided Three-Dimensional Interactive Application (CAD)
CATIS	Computer-Assisted Tactical Information System (mil., USA)
CATNIP	Common ArchiTecture for Next generation Internet Protocol (IPNG, RFC 1707)
CATOSL	Computer Associates - Trusted Open Source License (CA), "CA-TOSL"
CATS	CodeWarrior Analysis Tools
CAUCE	Coalition Against Unsolicited Commercial Email (org., Internet, spam, UCE)
CAV	Constant Angular Velocity (CD, HDD, MOD)
CAVE	Cave for Automated Virtual Environment (VR)
CAVLC	Context-Adaptive Variable Length Coding (AVC)
CAVO	Computer Associates - Visual Objects (CA, DB), "CA-VO"
CBASIC	Commercial Beginners All purpose Symbolic Instruction Code (BASIC)
CBB	Current Branch for Business (MS, Windows)
CBC	Cipher Block Chaining [mode] (DES, DESE, RC5, cryptography)
CBCMAC	Cipher Block Chaining of Message Authentication Code (CBC, MAC, cryptography, WLAN), "CBC-MAC"
CBCP	CallBack Control Protocol
CBCS	Computer Based Conversation System (BBS)
CBDF	Character Bitmap Distribution Format (Adobe)
CBDS	Connectionless Broadband Data Service (Europe)
CBDTPA	Consumer Broadband and Digital Television Promotion Act (USA, DRM)
CBE	Certified Banyan Engineer (Banyan, VINES)
CBEFF	Common Biometric Exchange Format Framework (NIST, ISO 19785)
CBEMA	Computer & Business Equipment Manufacturers Association (org.)
CBF	Code Behind Form (MS, Access, DB)
CBGA	Ceramic Ball and Grid Array (IC, CPU)
CBIOS	Compatibility Basic Input Output System (IBM, BIOS)
CBMS	Connectionless Broadband Data Service
CBQ	Class Based Queueing
CBR	Constant Bit Rate (ATM, VBR, ABR, UBR, QOS, BIT)
CBRAM	Conductive Bridging Random Access Memory (RAM, IC)
CBS	Certified Banyan Specialist (Banyan, VINES)
CBS	Component Based Setup (MS, Windows)
CBSR	Candidate BootStrap Router (PIM, BSR, Multicast), "C-BSR"
CBT	Canon Buffer Transmission (Fax)
CBT	Computer-Based Training
CBT	Core Based Tree [multicast protocol] (IP, RFC 1949/2189, ST, Multicast)
CBT	Cursor Backward Tabulation (CFT)
CBU	Capacity BackUp (IBM, zSeries)
CBX	Computerized Branch eXchange (PBX)
CC	Carbon Copy
CC	Common Criteria [for IT Security Evaluation] (CC)
CC	Continuity Cell (ATM)
CC	Country Code (MS-ISDN, GSM, mobile-systems)
CC	Cross Connector
CC	credit card
CCA	Cisco Clean Access (Cisco)
CCA	Clear Channel Assessment (WLAN)
CCAF	Call Control Agent Function (IN)
CCAP	Converged Cable Access Platform (DOCSIS)
CCC	Cablelabs Client Configuration (DHCP)
CCC	Catalyst Control Center (ATI, Windows)
CCC	Chaos Computer Club (org.)
CCC	Computer Control Center
CCC	Cube Connected Cycles (MP)
CCCA	Campus Computer Communication Association (org., USA)
CCCH	Common Control CHannel (GSM, mobile-systems)
CCCI	Center for Cyber Communities Initiative (org., Japan)
CCD	Charge Coupled Device
CCDCOE	Cooperative Cyber Defence Centre of Excellence (org., NATO)
CCE	Connection Control Entity
CCE	[visual basic] Control Creation Edition (VB, ActiveX, MS)
CCETT	Centre Commun d'Etudes de Telediffusion et Telecommunications (org., France)
CCF	Campus Computing Facilities (org.)
CCF	Capsulated Color Filter (NEC)
CCF	Central Computer Facility
CCF	Connection Control Function (IN)
CCF	Controller Configuration Facility
CCFL	Cold Cathode Fluorescent Lamp (LCD)
CCFT	Cold Cathode Fluorescent Tube (LCD, Display)
CCI	Cache Coherent Interconnect
CCIA	Computer & Communication Industry Association (org.)
CCIRN	Coordinating Committee of International Networks (org.)
CCIS	Common Channel Interoffice Signaling (AT&T)
CCITT	Comite Consultatif International Telegraphique et Telephonique (org., ITU, predecessor)
CCL	Cerberus Central Limited (manufacturer)
CCM	CORBA Component Model (CORBA)
CCM	Change and Configuration Management
CCM	Counter with CBC-MAC (cryptography, CBC, MAC, RFC 3610)
CCMDB	Change and Configuration Management DataBase (IBM, Tivoli)
CCMP	Counter mode CBC MAC Protocol (CBC, MAC, cryptography, WLAN)
CCNC	Common Channel Network Controller
CCNC	Computer / Communications Network Center
CCNUMA	Cache-Coherent Non Uniform Memory Access (SMP, NUMA), "cc-NUMA"
CCP	Command Console Processor (CP/M)
CCP	Communications Control Program (OS, IBM)
CCP	Compact Communication Products (TPS)
CCP	[PPP] Compression Control Protocol (PPP, RFC 1962)
CCPI	Cavium Coherent Processor Interconnect
CCPP	Composite Capability / Preference Profiles (W3C, RDF), "CC/PP"
CCR	Commitment, Concurrency and Recovery (OSI)
CCR	Current Cell Rate (ATM)
CCRA	Common Criteria Recognition Arrangement (CC)
CCRMA	Center for Computer Research in Music and Acoustics (org., Stanford, UK)
CCS	Cambridge Cybernetic Society (org.)
CCS	Cluster Configuration System (GFS)
CCS	Coded Character Set (CCS, Unicode)
CCS	Common Channel Signaling (IN)
CCS	Common Command Set (SCSI)
CCS	Common Communications Support (IBM, SAA)
CCS	Communications-Computer Systems, "C-CS"
CCS	Computerized Charging System
CCS	Cyprus Computer Society (Org, Zypern)
CCS	[Conference on] Computer and Communications Security
CCS7	Common Channel signaling System 7 (IN, DTAG, CCITT)
CCSID	Coded Character Set IDentification (IBM)
CCSY	Cooperative Computing System Program (HP)
CCT	China Coast Time [+0800] (TZ)
CCTA	Central Computer and Telecommunications Agency (org., UK, predecessor, OGC)
CCTLD	Country Code Top Level Domain (Internet, ICANN), "ccTLD"
CCU	Cache Control Unit (Wyse)
CCU	Customer Control Unit
CCV	C-bit Coding Violation [error event] (DS3/E3, BIT)
CCW	COM Callable Wrapper (MS, COM, Java)
CCX	CPU Core compleX (CPU)
CD	Carrier Detect (MODEM, RS-232)
CD	Change Directory (DOS, Unix, OS/2)
CD	Committee Draft (ISO)
CD	Compact Disk (CD)
CDA	Combined dynamic Data Authentication (EMV, cryptography)
CDA	Communications Decency Act (Internet, USA)
CDA	Compound Document Architecture (DEC)
CDATA	Character DATA (DTD, PCDATA)
CDB	Command Descriptor Block
CDBS	Connectionless Data Bearer Service
CDBX	Computerized Digital Branch eXchange (PBX)
CDC	Communication Device Class (USB, MS, Windows, WMCDC)
CDC	Connected Device Configuration (JVM)
CDC	Control Data Corporation (manufacturer)
CDC	Cult of the Dead Cow (org.), "cDc"
CDD	Compatibility Definition Document (Android)
CDD	Component Design Document
CDDA	Compact Disk - Digital Audio (CD, Digital audio), "CD-DA" 
CDDI	Copper Distributed Data Interface (FDDI, UTP)
CDDL	Common Development and Distribution License
CDE	Certified Directory Engineer (Novell, Netware)
CDE	Common Desktop Environment (Unix)
CDE	Compact Disk - Erasable (CD), "CD-E" 
CDE	Cooperative Development Environment (Oracle)
CDEF	Control DEfinition Functions (Apple, MDEF)
CDF	Channel Definition Format (MS, Internet, XML)
CDF	Compound Document Framework (IBM, OLE)
CDFS	Compact Disk File System (CD, OS/2, IBM)
CDG	Compact Disk + Graphics (CD), "CD+G" 
CDI	Compact Disk - Interactive (CD), "CD-I" 
CDIF	CASE Data Interchange Format (CASE)
CDK	Control Development Toolkit (MS, VB)
CDL	Controlled Digital Lending
CDM	Compressed Data Mode
CDM	Conceptional Data Model (DB, PDM, Powerdesigner)
CDM	Content Decryption Module (cryptography)
CDMA	Code Division Multiple Access (telecommunication, mobile-systems)
CDMIDI	Compact Disk + Musical Instruments Digital Interface (CD, MIDI), "CD+MIDI" 
CDMO	Compact Disk - Magneto Optical (CD), "CD-MO" 
CDMRW	Compact Disk - Mount Rainier Washington (CD-RW, CD), "CD-MRW"
CDMS	Command and Data Management System (ESA, Venus-Express)
CDMS	Communication Driver Maintenance System (ISDN, HST)
CDMU	Command and Data Management Unit (ESA, Venus-Express, CDMS)
CDN	Content Delivery Network (Internet)
CDNC	Chinese Domain Name Consortium (org., Internet)
CDO	Collaboration Data Objects (WSH, MS)
CDO	Common Data Objects (MS, ASP)
CDP	Chrome Debugging Protocol
CDPC	Cellular Digital Packet Data
CDPD	Cellular Digital Packet Data (mobile-systems)
CDPN	Context Dependent Path Names (CDSL, NFS, GFS)
CDR	Compact Disk - Recordable (CD), "CD-R" 
CDR	Contents of the Decrement Register (IBM, ELISP, CAR)
CDRA	Character Data Representation Architecture
CDRAM	Cached Dynamic Random Access Memory (RAM, DRAM, IC)
CDRM	Cross Domain Resource Manager (VTAM, SSCP, IBM)
CDROM	Compact Disk - Read Only Memory (CD, ROM), "CD-ROM" 
CDROMXA	Compact Disk - ROM / eXtended Architecture (CD, MPC, ROM), "CD-ROM/XA" 
CDRW	Compact Disk - ReWritable (CD), "CD-RW"
CDS	Cell Directory Service (DCE)
CDS	Class Data Sharing (Java)
CDS	Current Directory Structure (BIOS. DOS)
CDSA	Common Data Security Architecture (HP, cryptography)
CDSG	Cultural Diversity Steering Group (ISSS)
CDSL	Context Dependent Symbolic Links (CDPN, NFS, GFS)
CDSS	Creative Decision Stimulation Systems (AI, DSS)
CDT	Cambridge Display Technology (manufacturer)
CDT	Cell Delay Tolerance (ATN)
CDT	Central Daylight Time [-0500] (TZ, CST, USA)
CDT	Compressed Domain Transcoder (DVD)
CDTV	Commodore Dynamic Total Vision (Commodore)
CDV	Cell Delay Variation (UNI, ATM, QOS)
CDVT	Cell Delay Variation Tolerance (UNI, ATM, CDV)
CDWO	Compact Disk - Write Once (CD), "CD-WO" 
CE	Communaute / Comunique Europeenne (Europe)
CE	Communications-Electronics, "C-E"
CE	Compact Edition (MS, Windows)
CE	Connection Endpoint (UNI)
CEA	Capability-Exchange-Answer (CER, Diameter)
CEARCH	Cisco Educational ARCHive (Cisco, WWW)
CEBIT	welt CEntrum Buero Information Telekommunikation (fair), "CeBIT"
CEC	Consumer Electronics Control [protocol] (HDMI)
CECI	CICS Enhanced Command Interpreter (IBM, CICS)
CECMG	Central Europe Computer Measurement Group (org., Europe), "cecmg"
CEDA	CICS Enhanced resource Definition online Application (CICS, IBM)
CEDF	CICS Execution Diagnostic Facility (CICS, IBM)
CEDR	[Microsoft Windows] Compact Edition Driver Repository (MS, Windows, CE)
CEE	Converged Enhanced Ethernet
CEE	[Linux] Consumer Electronics Edition (MontaVista, Linux, PDA)
CEECEB	Central and Eastern European Countries EDIFACT Board (org., EDIFACT), "CEEC/EB"
CEFACT	CEntre for Facilitation of procedures and practices in Administration, Commerce and Transport
CEG	Continuous Edge Graphics (Grafik, IC)
CEI	Connection Endpoint Identifier (UNI)
CEIP	Customer Experience Improvement Program (MS)
CELL	CIP/Ethernet Library for Linux (Linux, ethernet, CIP, PLC)
CELP	Card Edge Low Profile [socket]
CELP	Code Excited Linear Prediction
CEM	Common [IT Security] Evaluation Methodology (CC)
CEM	Contract Equipment Manufacturer
CEMT	CICS Enhanced Master Terminal transaction (CICS, IBM)
CEN	Comite Europeen de Normalisation (org., Europe, Brussels)
CENELEC	Comite Europeen de Normalisation ELECtrotechnique (org., CEN, Europe)
CENTR	Council of European National Top level Domain Registries (org., TLD)
CEO	chief executive officer
CEPAC	CMOS-Ein-Platinen-Allzweck-Computer (IC, CMOS, C'T)
CEPD	Comite Europeen de la Protection des Donnees (org.)
CEPIS	Council of European Professional Informatics Societies (org., Europe)
CEPT	Conference of European Postal and Telecommunications administrations (org., CCITT, conference, Europe)
CER	Capability-Exchange-Request (CEA, Diameter)
CER	Cell Error Ratio (ATM)
CERFNET	California Educational and Research Federation NETwork (network), "CERFNet"
CERN	Conseil Europeenne pour la Recherche Nucleaire (org., Europe, Geneva)
CERT	Computer Emergency Response Team (DARPA, CMU, Internet)
CES	C-bit Errored Seconds (DS3/E3, BIT)
CES	Character Encoding Scheme (CSS, Unicode)
CES	Circuit Emulation Service
CES	Consumer Electronics Show (fair, USA, CTA)
CESAR	Central Employment Search And Retrieval (WWW)
CESG	Communications-Electronics Security Group (org., UK, GCHQ)
CET	Central European Time [+0100] (TZ, MET)
CET	Centro de Estudes de Telecomunicoes (org., Portugal)
CF	Carry Flag (assembler)
CF	Compact Flash [card]
CF	Compact Framework (MS, .NET, PocketPC)
CFA	Center for Architecture (org., JIEO, DISA)
CFA	Code Fields Address (Forth)
CFAA	Computer Fraud and Abuse Act (USA)
CFB	Cipher FeedBack [mode] (cryptography, DES)
CFC	ColdFusion Component (WWW, HTTPD)
CFD	Call For Discussion (Internet)
CFD	Computational Fluid Dynamics [applications]
CFE	Center for Engineering (org., JIEO, DISA)
CFF	Compact Font Format (Adobe)
CFI	CAD Framework Initiative (org., CAD)
CFM	Clock From Master (CTM, Rambus)
CFM	Code Fragment Manager (Apple)
CFM	ConFiguration Management (FDDI, SMT)
CFMC	Committee to Fight Microsoft Corporation (org., MS)
CFML	Cold Fusion Markup Language
CFP	Call For Papers
CFP	Computers, Freedom & Privacy [conference]
CFP	Contention Free Period (PCF, MAC)
CFQ	Complete Fair Queueing (Linux)
CFS	Center for Standards (org., JIEO, DISA)
CFS	Cryptographic FileSystem (Linux, cryptography)
CFT	Call For Testers
CFT	Cusor Forward Tabulation (CBT)
CFV	Call For Vote (Internet, Usenet), "CfV"
CFV	call for votes
CFWS	Comments / Folding White Space (RFC 1822)
CFY	calling for you
CG	C for Graphics (Nvidia, MS), "Cg"
CG	center of gravity
CGA	Colour Graphics Adapter
CGA	Graphics Communications Association (org.)
CGARI	Graphics Communications Association Research Institute (org., CGA)
CGATS	Committee for Graphics Arts Technologies Standards (org., ANSI)
CGDC	Computer (???) Game Developers' Conference
CGE	Carrier Grade Edition (Linux, MontaVista, CGL)
CGEMM	Complex single precision GEneral Matrix Multiply (GEMM, BLAS)
CGH	Computer Generated Holography
CGI	Common Gateway Interface (WWW)
CGI	Computer Generated Imagery
CGI	Computer Graphics Interface
CGI	Computer Graphics International (Konferenz)
CGL	Carrier Grade Linux (Linux, OSDL)
CGM	Computer Graphics Metafile (ISO 8632)
CGMS	Copy Generation Management System (CD)
CGMSA	Content Generation Management System - Analog (WPE), "CGMS-A"
CGRM	Computer Graphics Reference Model (ISO, IEC, ISO/IEC 11072)
CGS	Continuous Grain Silicon [technology] (Sharp, LCD)
CGVDI	Computer Graphic Virtual Device Interface, "CG-VDI"
CHAID	CHisquard Automatic Interaction Detector / Detection (SPSS)
CHANOPS	channel operator status
CHAP	[PPP] Challenge Handshake Authentication Protocol (PPP, RFC 1334/1994)
CHCP	CHange Code Page (DOS)
CHDL	Computer Hardware Description Language (HDL)
CHES	Cryptographic Hardware and Embedded Systems [conference]
CHEST	Computers in Higher Education Software Team (org., UK)
CHILL	CCITT HIgh Level programming Language (CCITT)
CHPE	Compiled Hybrid Portable Executable
CHRP	Common Hardware Reference Platform (AIM)
CHS	Cylinder Head Sectors (HDD, BIOS)
CHSM	C Hardware Specific Module (NEST, MLID, Novell)
CHV	Card Holder Value [aka PIN] (ICC, PIN)
CI	Check In (RCS)
CI	Coded Information
CI	Common Interface (DVB)
CI	Component Interface (DMI)
CI	Configuration Item (CM)
CI	Congestion Indicator
CIA	CAN In Automation (org., CAN), "CiA"
CIAC	Computer Incident Advisory Capability (org., LLNL, Internet)
CIB	Collective Intelligent Brick (IBM, HDD)
CIB	Computer Integrated Business
CIC	Carrier Identification Code
CIC	Certified IT Consultant (BVSI)
CIC	Coordination and Information Center (CSNET)
CICA	Center of Innovative Computer Applications (org.)
CICS	Customer Information Control System (IBM, CICS, Z/OS, OS/390, VSE/ESA)
CICSESA	Customer Information Control System/Enterprise Systems Architecture (IBM, CICS), "CICS/ESA"
CICSTS	Customer Information Control System / Transaction Server (IBM, VSE/ESA), "CICS/TS"
CICSVS	Customer Information Control System / Virtual Storage (IBM, CICS), "CICS/VS"
CID	Configuration - Installation - Distribution (IBM)
CIDF	Common Intrusion Detection Framework (CIDF, IDS)
CIDR	Classless Internet Domain Routing [protocol] (RFC 1519)
CIDS	Cabin Intercommunication Data System (Airbus, A380, TCP/IP)
CIE	Commission Internationale de l'Eclairage (org.)
CIF	Common Intermediate Format [352x288] (video)
CIFS	Common Internet File System (TCP/IP)
CIIRC	China Internet Illegal Information Reporting Center (China, org.)
CIL	Common Intermediation Language (CLI)
CIL	Computer Integration Laboratories (org., Apple, IBM, Novell, Sun, ...)
CILABS	Component Integration LABoratorieS (org.,, OpenDoc, Apple, IBM, Adobe, ...), CILabs
CIM	Cisco Interactive Mentor (Cisco)
CIM	Common Information Model (DMTF, XML, DMI, SAN, WBEM)
CIM	Computer Integrated Manufacturing
CIMOM	CIM Object Model (CIM, WBEM)
CIMOS	CIncinnati Milacron Operating System (OS), "CiMOS"
CIO	Cisco Information Online (Cisco, WWW)
CIP	Carrier Identification Parameter
CIP	Classical IP over ATM (IP, ATM, IETF)
CIP	Common ISDN Profile (Bluetooth, CAPI, ISDN)
CIP	Common Industrial Protocol (ODVA)
CIP	Computer Integrated Processing
CIP	Computer-Investitions-Programm
CIPA	Camera & Imaging Products Association (org.)
CIPA	Children's Internet Protection Act (Internet, USA, COPA)
CIQ	Customer Information Quality (OASIS, TC)
CIR	Committed Information Rate (ATM)
CIRAS	(Conference on] Computational Intelligence, Robotics and Autonomous Systems
CIRC	Cross Interleaved Reed-solomon Code (CD)
CIRCAMP	Cospol Internet Related Child Abusive Material Project (org.)
CIRCIT	Centre for International Research on Communication and Information Technology (org., Australia)
CIS	Card Information Structure / Space (PCMCIA)
CIS	Command Information System (mil., USA)
CIS	Compuserve Information Systems (network)
CIS	Contact Image Sensor
CISA	Certified Information Systems Auditor (ISACA)
CISA	Cybersecurity and Infrastructure Security Agency (org.)
CISC	Complex Instruction Set Computer (CPU)
CISE	Computer and Information Science Directorate (org., NSF)
CISKA	[3D] Campus-InformationsSystem KArlsruhe (Uni Karlsruhe, Germany, VRML)
CISM	Certified Information Security Manager (ISACA)
CISO	Certified Information Security Officer (ISTA)
CISPR	Comite International Special des Perturbations Radioelectriques (org.)
CISRAM	Cybernetics & Intelligent Systems - Robotics, Automation & Mechatronics (IEEE, conference), "CIS-RAM"
CISRT	Chinese Internet Security Response Team (org., China)
CISS	Center for Information Systems Security (org., JIEO, DISA, mil., USA)
CISS	Confirmation Interactive Site Server [technology]
CISSP	Certified Information Systems Security Professional (ISC2)
CIT	Center for Information Technology (org., USA)
CIT	Computer Integrated Telephony
CIT	Computer Intergrated Tooling
CITED	Copyright In Transmitted Electronic Documents (ESPRIT)
CIU	Core Interface Unit (Power4, IBM, IC)
CIU	Customer Initiated Upgrade (IBM, zSeries)
CIU	Customer-Initiated Upgrade [switch] ??? (IBM)
CIVIC	Cyclone Integrated Video Interfaces Controller (Apple)
CIX	Commercial Internet eXchange (ISP)
CJK	Chinese - Japanese - Korean [encoding]
CKOA	Cygwin Keeper of Acronyms (Cygwin, OLOCA)
CKRM	Class-based Kernel Resource Manager / Management
CL	Column Address Strobe Latency (CAS, IC)
CL	ConnectionLess (CO)
CL	Control Language (IBM, OS/400)
CL	Conversion Layer (HiperLAN/2, UMTS)
CLASS	Centralized Local Area Selective Signaling
CLASS	Custom Local Area Signaling Service
CLDC	Connected Limited Device Configuration (KVM, CDC, Java, JSR-139)
CLDR	Common Locale Data Repository (Android)
CLE	Certified Linux Engineer (Novell, Linux)
CLE	Certified Lotus Engineer (Lotus)
CLEC	Competitive Local Exchange Carrier
CLI	CLear Interrupt (assembler)
CLI	Call Level Interface (DB, SAG, X/Open, Oracle, Informix, MS, ...)
CLI	Class LIbrary (CLI)
CLI	Clearly Less Intimidating (slang, Cygwin)
CLI	Command Line Interpreter / Interface (OS)
CLI	Common Language Infrastructure (MS, .NET, ECMA, CLI)
CLIC	Chemnitzer LInux Cluster (Linux, Chemnitz), "CLiC"
CLIC	Computer Liability Insurance Coverage
CLID	Calling Line IDentification
CLIM	Common LISP Interface Manager (CLOS, LISP)
CLIW	Configurable Long Instruction Word (IC, CPU)
CLL	ConnectionLess Layer (UNI, NNI, ATM)
CLNAP	Connectionless Network Access Protocol (UNI, NNI, ATM)
CLNP	ConnectionLess Network Protocol (OSI, ISO 8473)
CLNS	ConnectionLess Network Service
CLOS	Common LISP Object System (LISP)
CLP	Cell Loss Priority (UNI, ATM, CLR)
CLP	Cumulative Licensing Program (Adobe)
CLR	Cell Loss Ratio (UNI, ATM, QOS)
CLR	Common Language Runtime (MS, CLI, .NET)
CLS	Card Loading Signal
CLS	Common Language Specification (OOP, CLR, MS, .NET, CLS)
CLSF	ConnectionLess Service Function
CLSID	CLasS IDentifier (COM)
CLTP	ConnectionLess Transport Protocol (OSI)
CLUG	Chemnitzer Linux User Group (Chemnitz, user group, Linux)
CLUT	Color LookUp Table (VGA)
CLV	Constant Linear Velocity (CD, MOD)
CLX	Cascade Lake Xeon (Intel, CPU)
CLX	Class Library for cross platform (Delphi, Windows, Linux)
CLXAP	Cascade Lake Xeon - Advanced Performance (Intel,CPU), "CLX-AP"
CM	Compatibility Mode (PARISC, NM)
CM	Configuration Management
CM	Configuration Manager (BIOS, PNP)
CM	Connection Management (RR, MM, GSM, mobile-systems)
CM	CyanogenMod (Android)
CM2	Communication Manager /2 (IBM), "CM/2"
CM5	Connection Machine 5 (TMC)
CMAS	Cambridge Multiple Access System (OS)
CMC	Common Messaging Calls [interface] (XAPIA)
CMC	Complement Carry Flag (assembler)
CMC	Computer Mediated Communications [studies centre] (org., USA)
CMDS	Cambridge Model Distributed System (OS)
CME	Component Management Entity
CME	Core Managed Environment (Phoenix, MBR), "cME"
CMGA	Community of Massive Gaming Agents Internet, Germany, DTAG
CMGS	Cyan Magenta Gelb Schwarz (color system, DTP)
CMI	Coded Mark Inversion
CMI	Connection Manager Interface (IBM, SNA)
CMIA	China Medical Informatics Association (org., China)
CMIIW	Correct Me If I'm Wrong (slang, Usenet, IRC)
CMIIW	correct me if I'm wrong
CMIP	Common Management Information Protocol (OSI, ISO, DP 9506, X.700)
CMIS	Common Management Information Service (OSI)
CMISE	Common Management Information Service Element (CMIS)
CMM	Color Management Method (DTP, ICM)
CMMI	Capability Maturity Model Integration
CMMU	Cache/Memory Management Unit
CMO	Chi Mei Optoelectronic (manufacturer)
CMOL	CMIP Over LLC (OSI, LLC)
CMOS	Complementary-symmetry Metal-Oxide Semiconductor (IC)
CMOT	CMIP Over TCP (OSI, RFC 1189, CMIP, TCP)
CMP	Chip MultiProcessing (IBM, HP, Sun)
CMP	Container-Managed Persistence (Java, EJB, BMP)
CMP	Cooperative Marketing Partner (DEC)
CMR	Cell Misinsertion Rate (ATM)
CMS	Chip Multiprocessor System
CMS	Code Management System (DEC, CM)
CMS	Color Management System
CMS	Content Management Software / System
CMS	Cryptographic Message Syntax (cryptography, RFC 2630)
CMS	[Cambridge] / Conversational Monitor System (IBM, OS, VM, VME, VM/ESA, Z/VM)
CMSS	???
CMT	Connection ManagemenT (FDDI)
CMTC	Critical Machine-Type Communication (MTC, 3GPP), "C-MTC"
CMTS	Cable MODEM Termination System (DOCSIS, MODEM)
CMU	Carnegie-Mellon-University (org.)
CMX	Communications Manager uniX (Unix)
CMY	Cyan Magenta Yellow (color system, DTP)
CMYK	Cyan Magenta Yellow blacK (color system, DTP)
CN	Communications Network
CN	Congestion Notification (IEE 802.1Qau, DCB)
CN	Connection Management (mobile-systems)
CN	Coordination Message (ISO 9646-3, TTCN)
CN	Copy Network
CN	Corporate Network
CNA	CVE Numbering Authorities (CVE)
CNA	Certified Novell Administrator (Novell, Netware)
CNA	Communication Network Architecture (SEL)
CNA	Communications Network Application
CNBC	Center for Neural Basis of Cognition (org., CMU, AI)
CNC	Communications Network Control
CNC	Computerized Numerical Control
CND	Caldera Network Desktop (Linux)
CND	Caller Number Delivery (MODEM)
CNE	Certified Netware Engineer (Novell, Netware)
CNE	Corporate Network Edition (eBlaster)
CNEPA	Certified Netware Engineers Professional Association (org., Netware)
CNET	Centre Nationale d'Etudes des Telecommunications (org., France)
CNI	Certified Netware Instructor (Novell, Netware)
CNI	Coalition for Networked Information (org.)
CNI	Common Network Interface
CNIDIR	Coalition for Networked Information DIRectories (Internet)
CNIL	Commission Nationale de l'Informatique et des Libertes (org., France)
CNM	Communications Network Management
CNM	Customer Network Management
CNMA	Communications Network for Manufacturing Applications
CNMS	Cylink Network Management System
CNN	Convolutional Neural Network
CNNIC	China interNet Network Information Center (org., Internet, China)
CNP	Corporate Network Products (TPS)
CNP	continued [in my] next post
CNPS	Computer Noise Prevention System
CNR	Communications and Network Riser
CNRCVUUCP	Compressed News ReCeive Via UUCP
CNS	Certified Novell Salesperson (Novell, Netware)
CNS	Complimentary Network Service
CNS	Compuserve Network Services (CIS)
CNTFET	Carbon Nano-Tube Field Effect Transistor
CO	Check Out (RCS)
CO	Connection Oriented (CL)
COA	Certificate of Authenticity (MS, Windows, XP)
COACH	Component based Open source ArCHitecture for distributed systems (CORBA)
COAS	Caldera Open Administration System (Linux)
COAST	Cache On A STick (Intel)
COAST	Computer Operations, Audit and Security Technology (org.)
COB	close of business [day]
COBOL	COmmon Business Orientated Language
COBRA	COmmunication technology: Basic Research and Applications
COBRA	COmmunication technology: Basic Research and Applications (org., Netherlands)
COBWEB	COntent-Based image retrieval on the WEB (WWW, ESPRIT)
COCA	Cost Of Cracking Adjustment (cryptography)
COCOT	Customer Owned Coin Operated Telephone
COD	Capacity On Demand (IBM, zSeries), "CoD"
COD	Connection Oriented Data
CODASYSL	Conference On DAta Systems Languages (Konferenz)
CODCF	Central Office Data Connecting Facility
CODE	COlor Depth Enhancement (ATI)
CODE	Client/server Open Development Environment (Powersoft)
CODE	Collabora Online Development Edition
CODEC	COder - DECoder
COE	Central Office Equipment
COE	Common Operating Environment [certification] (DISA, mil.)
COEES	COE Engineering System (COE)
COFDM	Coded Orthogonal Frequency Division Multiplexing (Digital audio, DAB)
COFEE	Computer Online Forensic Evidence Extractor (MS)
COFF	Common Object File Format (Unix)
COICA	Combating Online Infringement and Counterfeits Act
COIPX	Connection Orientated Internet Packet eXchange (Novell, Netware, IPX), "CO-IPX"
COL	Caldera Open Linux (Caldera, Linux)
COLD	Computer Output on LaserDisk
COLIBRI	COprozessor fuer LISP auf der Basis von RISC (RISC)
COLLADA	COLLAborative Design Activity (XML, 3D)
COM	Component Object Model (OLE, OLE2, OCX, ActiveX, MS)
COM	Computer Output on Microfilm
COM	Continuation of Message
COMA	Cache Only Memory Architecture (SMP)
COMAL	COMmon Algorithmic Language
COMDEX	COMputer Dealer's EXposition (fair)
COMIC	COnversational Multimodal Interaction with Computers [project] (Europe)
COMPARTS	COMputergestuetztes PARtner-TeilebestandsSystem (MBAG)
COMPTIA	COMPuting Technology Industry Association (org.)
COMTECH	COMputer TECHnologies (fair)
CONCERT	Communications for North Carolina Education, Research and Technology (network)
CONCISE	COSINE Network's Central Information Service for Europe (COSINE, network)
CONLAN	CONsensus LANguage (HDL)
CONS	Connection Oriented Networking Service
CONTAC	Central Office NeTwork ACcess
COOL	COBOL Object Orientated Language (OOP, COBOL)
COOP	Concurrent Object Orientated Programming (OOP)
COP	Character-Oriented Protocol
COPA	Child Online Protection Act (Internet, USA, CIPA)
COPP	Certified Output Protection Protocol (MS, RSA, WPE)
COPPA	Children's Online Privacy Protection Act (Internet)
COPS	Common Open Policy Service protocol (RFC 2748)
COPS	Computer Oracle and Password System (Unix)
COPSPR	Common Open Policy Service for Policy Provisioning (COPS, RFC 3084), "COPS-PR"
CORAN	Communication ORiented Application aNalysis
CORBA	Common Object Request Broker Architecture (OMG)
CORD	Central Office Re-architected as a Datacenter (ONF)
CORDIS	COmmunity Research and Development Information Service (Europe)
CORS	Cross-Origin Resource Sharing (HTML)
COS	Card Operating System (OS, ICC)
COS	Cassette Operating System (OS)
COS	Class of Service
COS	Clip On Socket (CPU)
COS	Commercial Operating System (OS, DEC, PDP 11)
COS	Concurrent Operating System (OS, UNIVAC 9200, UNIVAC 9300)
COS	Corporation for Open Systems (org., OSI, user group)
COS	Cray Operating System (OS, Cray)
COSA	COmputerunterstuetzte SAchbearbeitung
COSA	COmputing in der Sozialen Arbeit (Org, Koeln, Germany)
COSE	Common Open Software Environment (HP, Sun, IBM, SCO, USL, Univel)
COSINE	Cooperation for OSI Networking in Europe (org.)
COSMOS	COmputer System for Mainframe OperationS
COSS	Common Object Services Specification
COST	COpenhagen SGML Tool (SGML), "CoST"
COT	Central Office Terminal
COTP	Connection-Oriented Transport Protocol (OSI, ISO 8073)
COTS	Commercial Off The Shelf (CC)
COTS	Connection-Oriented Transport [layer] Service
COTS	commercial off-the-shelf
COW	Character Orientated Windows (MS, SAA, UI)
COW	Chrome Object Wrapper (Mozilla)
COW	Copy On Write
CP	Connection Processor
CP	Contention Period (DCF, MAC)
CP	Control Point (IBM, SNA)
CP	Control Program (IBM, OS, VM/ESA, VM)
CP	Coordination Point (ISO 9646-3, TTCN)
CPA	Collaboration Partner Agreement (CPPA, ebXML)
CPA	Collaboration Protocol Agreements (ebXML)
CPAN	Comprehensive PERL Archive Network (PERL)
CPC	Central Processing Complex
CPC	Cost Per Copy
CPC	cost per click
CPCI	Compact Peripheral Component Interconnect (PCI), "cPCI"
CPCM	Content Protection Copyright Management (DVB, CPTWG)
CPCS	Common Part Convergence Sublayer (ATM)
CPDP	Cellular Digital Packet Data
CPE	Common Platform Enumeration (URI, NIST)
CPE	Continuing Professional Education
CPE	Customer Premises Equipment (ACS)
CPE	customer premises equipment
CPF	Control Program Facility (OS, IBM, S/38)
CPGA	Ceramic Pin Grid Array (IC, CPU)
CPH	Cost Per Hour
CPI	Characters Per Inch
CPI	Common Part Indicator (ATM)
CPI	Common Programming Interface (IBM, SAA)
CPI	Computer Private branch exchange Interface
CPI	Cost Per Instruction
CPIC	Common Programming Interface for Communications (IBM, SAA, API), "CPI/C"
CPIO	CoPy In/Out (Unix)
CPIRR	Common Programming Interface Resource Recovery (IBM, SAA)
CPL	Combined Programming Language (DEC, PL/1)
CPL	Common Public License (IBM, IPL)
CPL	Control Panel Applet (MS, Windows, XP)
CPL	Conversational Programming Language (DEC)
CPLB	Cache Protection Lookaside Buffer (Blackfin)
CPLD	Complex Programmable Logic Device (PLD, IC, RL)
CPM	Communication Processor Module (Motorola)
CPM	Control Program for Microcomputers (OS, DR), "CP/M"
CPM	Cost Per Minute
CPM	Critical Path Method
CPMS	Central Point Management Services (Central Point)
CPN	Calling Party Number
CPN	Compuserve Packet Network (network)
CPN	Customer Premises Network
CPNET	Control Program / NETwork (CP/M, OS), "CP/NET"
CPNOS	Control Program / ??? (CP/NET, CP/M, OS), "CP/NOS"
CPODA	Contention Priority Orientated Demand Assignment (MAC, PODA)
CPOL	Code Project Open License
CPP	Collaboration Partner Profile (CPPA, ebXML)
CPP	Collaboration Protocol Profiles (ebXML)
CPPA	Collaboration Partner Profile and Agreement (ebXML, XML)
CPPM	Content Protection for Pre-recorded Media (CPRM)
CPPS	Card / Paper tape Programming System (OS, IBM)
CPR	CPU Parameter Recall (Asus), "C.P.R."
CPRM	Content Protection for Recordable Media (CPPM)
CPS	Central Processing System
CPS	Characters Per Second
CPS	Cyber-Physical System
CPSI	Configurable PostScript Interpreter
CPSR	Computer Professionals for Social Responsibility (org., USA)
CPTA	China Power Technology Alliance (org.)
CPTWG	Copyright Protection Technical Working Group (DVB, WG)
CPU	Central Processing Unit
CPUID	Central Processing Unit IDentifier (CPU)
CPW	Cross-Platform Windowing [library] (OpenGL)
CQD	Carbon Quantum Dots
CQL	Cassandra Query Language
CR	Carriage Return (ASCII)
CR	Challenge-Response (SPAM)
CRAFT	Cray Research Adaptive FORTRAN (Cray, MPP, FORTRAN)
CRAM	Cache RAM (RAM)
CRAM	Card Random Access Memory (RAM, IC)
CRAN	Comprehensive R Archive Network
CRAS	Cable Repair Administrative System
CRC	Cyclic Redundancy Check[sum]
CRCG	Common Routing Connection Group
CRCG	[Fraunhofer] Center for Research in Computer Graphics (org., USA)
CRD	Color Rendering Dictionary (PS)
CREN	Corporation for Research and Educational Networking (network)
CRESTA	Collaborative Research into Exascale Systemware, Tools and Applications (Europe)
CRET	Color - Resolution Enhancement Technology (HP), "C-REt"
CRFVC	Connection Related Function Virtual Channel (UPC, UNI), "CRF(VC)"
CRFVP	Connection Related Function Virtual Path (UPC, UNI), "CRF(VP)"
CRI	Container Runtime Interface
CRI	Cray Research, Inc. (manufacturer)
CRIME	Compression Ratio Info-leak Made Easy (HTTPS)
CRIMM	Continuity Rambus Inline Memory Module (RIMM, IC, Rambus)
CRIN	Centre de Recherche en Informatique de Nancy (org., France)
CRISC	Complex-Reduced Instruction Set Computer
CRISP	Complex-Reduced Instruction Set Processor
CRISP	Cross Registry Internet Service Protocol (Internet, RFC 3707)
CRJE	Conversational Remote Job Entry (RJE)
CRL	Certificate Revocation List (cryptography)
CRL	Compile-time Reconfigurable Logic (RL)
CRLF	Carriage Return - Line Feed (ASCII, DOS)
CRM	Customer Relationship Management
CRM	customer relationship management
CRML	Customer Relationships Markup Language (xCRL, predecessor)
CRP	Candidate Rendezvous Point (PIM, RP, Multicast), "C-RP"
CRP	Common Reference Platform (PowerPC)
CRPC	Center for Research on Parallel Computation (STC)
CRS	CMOS Reload Switch (CMOS, Gigabyte), "C.R.S."
CRS	Cell Relay Service (UNI, ATM)
CRT	Cathode Ray Tube
CRT	Computer Technology Research [corporation] (provider)
CRTC	Cathode Ray Tube Controller (EGA, VGA, MCGA)
CRTM	Core Root of Trust for Management (TCPA)
CRUD	Create, Read, Update, Delete
CS	Carrier Selection
CS	Chip Select (IC)
CS	Client/Server, "C/S" 
CS	Code Segment [register] (CPU, Intel, assembler)
CS	Coding Scheme (GPRS, mobile-systems)
CS	Computer Science
CS	Controlled Slip [error event] (DS1/E1)
CS	Convergence Sublayer (ATM)
CS1	Capability Set 1 (IN), "CS-1"
CS2	Capability Set 2 (IN)
CSA	Callpath Service Architecture (IBM, CTI)
CSA	Client Service Agent
CSA	Communication Streaming Architecture (Intel, MCH, DNB)
CSA	Configuration Status Accounting
CSAIL	Computer Science and Artificial Intelligence Labs (MIT)
CSAPI	Common Speller Application Program Interface (API)
CSC	Computer Sciences Corporation (provider)
CSC	Consumer Software Customization
CSCC	Concurrent SuperComputing Consortium (org.)
CSCD	Caldera Systems Curriculum Developers (Caldera)
CSCSI	Canadian Society for the Computational Studies of Intelligence (org., Canada, AI)
CSCW	Computer Supported Cooperative Work
CSD	Certified Scrum Developer (Scrum)
CSD	Control flow Specification Diagram (CASE)
CSD	Corrective Service Diskettes (IBM)
CSD	Customer Specific Dictionaries
CSDC	Circuit Switched Digital Capability
CSDC	Code Segment Descriptor Cache [register] (CS, Intel, CPU)
CSE	Client-Server Environment
CSEIA	[conference on] Computer Support for Environmental Impact Assessment (IFIP, conference)
CSEL	Cable SELect (EIDE, HD)
CSELT	Centro Studi E Laboratori Telecomunicazioni [s.p.a.] (org., Italy)
CSEM	Centre Suisse d'Electronique et de Microtecnique (org., Switzerland)
CSES	C-bit Severely Errored Seconds (DS3/E3, BIT)
CSFB	Circuit Switched FallBack (LTE, UMTS, GSM)
CSG	Constructive Solid Geometry (CAD, CAM)
CSGO	Counter-Strike: Global Offensive, "CS:GO"
CSH	C SHell (Unix, BSD, Shell)
CSH	Complementary Software House (DEC)
CSI	Code Sequence Identification [technology] (Lavasoft, Ad-Aware)
CSI	Common Secure Interoperability (CORBA)
CSI	Common System Interface (Intel, Xeon)
CSI	CompuServe Incorporated (ISP)
CSI	Convergence Sublayer Indication (ATM)
CSIC	Customer Specific Integrated Circuit (IC, RL)
CSID	Caller Station IDentification (Fax)
CSIDS	Central command/Southern command Integrated Data System (mil., USA)
CSII	Center for Systems Interoperability and Integration (org., ???)
CSIP	Chipset Stable Image Program
CSIP	Commercial Stable Image Platform (AMD)
CSIRO	Commonwealth Scientific and Industrial Research Organization (org., UK)
CSIRT	Computer Security Incident Response Team
CSIS	Central Schengen Information Systen (SIS, Europe, Strasbourg)
CSKI	Ceska Spolecnost pro Kybernetiku a Informatiku (org., Tschechien)
CSL	Callable Services Library (IBM, VM/ESA, CMS)
CSL	Computer SoLutions [software gmbh] (Haendler)
CSLIP	Compressed [headers] Serial Line Internet Protocol (SLIP, IP)
CSM	Certified Scrum Master (Scrum)
CSM	Cluster System Management (IBM)
CSM	Compatibility Support Module (UEFI)
CSMA	Carrier Sense Multiple Access
CSMACA	Carrier Sense Multiple Access with Collision Avoidance, "CSMA/CA" 
CSMACD	Carrier Sense Multiple Access with Collision Detection (IEEE 802.3, ethernet, CSMA/CD), "CSMA/CD"
CSMS	C Specific Media Support (NEST, MLID, Novell)
CSMUX	Circuit Switching MUltipleXer (FDDI), "CS-MUX"
CSN	Card Select Number (PNP)
CSNET	Computer + Science NETwork (USA, network, BITNET)
CSP	Centro Supercacolo Piemonte (org., Italy, HPC)
CSP	Chip Scale Package (IC)
CSP	Cloud Service Provider
CSP	Communicating Sequential Processes
CSP	Content Security Policy (WWW)
CSP	Cross System Product (IBM)
CSPDN	Circuit Switched Public Data Network (IN)
CSPDU	Convergence Sublayer Protocol Data Unit (ATM, PDU), "CS PDU"
CSPO	Certified Scrum Product Owner (Scrum)
CSPP	Computer Systems Policy Project [group] (org., USA. manufacturer)
CSR	Cell Switch Router (Toshiba)
CSR	Cell misSequenced Ratio (ATM)
CSR	Certificate Signing Request (SSL)
CSRAM	Clock Synchronous Random Access Memory (RAM, IC)
CSRC	Computing Science Research Center (org., Berkeley, BSD)
CSRF	Cross Site Request Forgery (WWW, Internet)
CSRG	Computer Systems Research Group (org., Unix, BSD)
CSS	Cascading Style Sheets (HTML, XML, WWW, JavaScript)
CSS	Computer Sub System
CSS	Content Scrambling System (DVD, Matsushita, IBM)
CSS	Controlled Slip Seconds (DS1/E1)
CSS	Customer Switching System
CST	Central Standard Time [-0600] (TZ, CDT, USA)
CSTA	Computer Supported Telecommunications Applications (ECMA, CTI)
CSTB	Computer Science and Technology Board (org., NRC)
CSTC	Computer Security Technology Center (org., CIAC)
CSTO	Computing Systems Technology Office (org., ARPA)
CSTR	Centre for Speech Technology Research
CSTS	Computer Supported Telecommunications Standard
CSU	Channel Service Unit (ATM)
CSUNET	California State University NETwork (network, USA)
CSV	Client SMTP Validation (SMTP, SPAM)
CSV	Comma Separated Values
CT	Certificate Transparency
CT	Chipcard Terminal (ICC, CT)
CT	Chips & Technologies (manufacturer), "C&T"
CT	Clackamas Technology (Intel, Pentium, CPU)
CT	[magazin fuer] Computer Technik, "c't" 
CTA	Consumer Technology Association (org.)
CTAN	Comprehensive Tex Archive Network (TeX, FTP), pause
CTAPI	Chipcard Terminal Application Program Interface (ICC, CT, API), "CT-API"
CTB	Communication ToolBox (Apple)
CTC	Convolutional Turbo Coding (WIMAX, 802.16e)
CTCA	Channel To Channel Adapter (IBM, System/370)
CTCP	Client To Client Protocol (IRC)
CTCPEC	Canadian Trusted Computer Product Evaluation Criteria (Canada)
CTD	Cell Transfer Delay (UNI, ATM, QOS)
CTDW	Cygwin Technical Documentation Writer (Cygwin)
CTE	Compliance Test and Evaluation, "CT & E"
CTEA	Copyright Term Extension Act (USA, DRM)
CTEC	Certified Technical Education Center (MS)
CTERM	Command TERMinal (DEC)
CTI	Computer Telephony Integration
CTM	Clock To Master (CFM, Rambus)
CTM	Close To Metal (AMD, 3D)
CTM	Communication Trunk of Medium range Mil., Germany
CTN	can't talk now
CTOS	Cassette Tape Operating System (OS, Datapoint)
CTP	Community Technology Preview
CTP	Cordless Telephony Profile (Bluetooth)
CTR	Common Technical Regulations (Europe)
CTR	[columbia university] Center for Telecommunications Research (org., USA)
CTRON	Central TRON (TRON)
CTS	Cipher Text Stealing [mode] (cryptography)
CTS	Clear To Send (MODEM, RS-232)
CTS	Common Type System (OOP, CLR, MS, .NET, CLS)
CTS	Compatibility Test Suite (Sun, J2EE)
CTS	Conformance Testing Service (OSTC)
CTS	Cut-Through-Switch (FC, PMC-Sierra)
CTSM	C Topology Specific Module (NEST, MLID, Novell)
CTSS	Compatible Time Sharing System (Unix, predecessor, OS, MIT)
CTSS	Cray TimeSharing System (OS, Cray, LLNL)
CTT	Cartridge Tape Transport
CTT	Character Translation Table
CTTC	Cartridge Tape Transport Controller
CTV	Cell Tolerance Variation (ATM)
CTY	Console teleTYpe
CU	Call Up (Unix)
CU	see you
CU	see you (slang, Usenet, IRC)
CUA	Common User Application
CUCUG	Champaign-Urbana Computer Users Group (org., user group)
CUD	Color Universal Design (Eizo, LCD)
CUDA	Compute Unified Device Architecture (Nvidia, 3D)
CUE	Corsair Utility Engine
CUI	Character User Interface (UI)
CUI	Common User Interface (AMS, UI)
CUL	Computer Und Lernen (org.)
CUL	see you Later (slang, Usenet, IRC)
CUL	see you later
CUP	Competitive UPgrade (MS)
CUPS	Common Unix Printing System (Unix, printing)
CUSI	Configurable Unified Search Interface (WWW)
CUSP	Commonly Used System Program (DEC)
CUT	Control Unit Terminal
CUU	ComputerUnterstuetzte Unterweisung
CVD	Chemical Vapor Deposition
CVE	Common Vulnerabilities and Exposures
CVF	Compressed Volume File (DOS)
CVIA	Computer Virus Industry Association (org., USA)
CVN	CounterVandalism Network (Wikia, VSTF)
CVS	Computer Vision Syndrome
CVS	Concurrent Versions System (Unix)
CVSD	Continuous Variable Delta Modulation (telecommunication)
CVSELP	Codex Vector Sum Excited Linear Prediction [algorithm] (Motorola, VOFR)
CVSS	Common Vulnerability Scoring System (NIAC)
CVW	MITRE Collaborative Virtual Workspace license
CWE	Common Weakness Enumeration
CWI	Centrum voor Wiskunde en Informatica (org., Netherlands)
CWIS	Campus Wide Information System
CWM	ClockworkMod Recovery (Android)
CWMI	Common Warehousing Metadata Interchange (DB, DWH)
CWP	Current Workspace Pointer (SPARC, CPU)
CWT	Character Width Table
CXFS	Clustered eXtended File System (SGI, RAID, XFS)
CXI	Common X-windows Interface (Unix)
CXML	Commerce eXtensible Markup Language (XML), "cXML"
CXTP	ConteXt Transfer Protocol (RFC 4067)
CYA	see ya
CYA	see you around
CYBOX	CYBer Observable eXpression, "CybOX"
CYE	check your email
CYMK	Cyan, Yellow, Magenta, blacK (color system)
D/B/A	doing business as
D/L	download
D2B	Domestic Digital Bus
D2D2T	Disk To Disk To Tape (Streamer, LTO)
D3D	Direct3D (DirectX, MS)
D3DRM	Direct3D Retained Mode (DirectX, MS)
DA	Data Area (CD-MRW, SA)
DA	Destination [MAC] Address (SNA, Token Ring, ATM, FDDI, ...)
DA	Digital-to-Analog (D/A), "D/A"
DA11	DatenAustauschphase 11 [allgemeine bauabrechnung] (GAEB)
DA81	DatenAustauschphase 81 [leistungsverzeichnis] (GAEB)
DA82	DatenAustauschphase 82 [kostenanschlag] (GAEB)
DA83	DatenAustauschphase 83 [angebotsanforderung] (GAEB)
DA84	DatenAustauschphase 84 [angebotsabgabe] (GAEB)
DA85	DatenAustauschphase 85 [nebenangebot] (GAEB)
DA86	DatenAustauschphase 86 [zuschlag/auftragserteilung] (GAEB)
DAA	Device Access Architecture (Vireo)
DAA	Digest Access Authentication (HTTP, RFC 2617)
DAAL	Data Analytic Acceleration Library (Intel)
DAAP	Digital Audio Access Protocol (DMAP, Apple)
DAAS	Desktop As A Service, "DaaS"
DAB	Digital Audio Broadcasting
DAC	Digital to Analog Converter
DAC	Direct Attached Copper
DAC	Discretionary Access Control (Unix, Linux, MAC)
DAC	Dual Address Cycle (PCI)
DAC	Dual Attached Concentrator (FDDI)
DACAPO	??? [hardware description language] (HDL)
DACL	Discretionary Access Control List (ACL)
DACNOS	Distributed Academic Computing Network Operating System (OS, HECTOR)
DACS	Digital Access Control System (ISDN, DES, cryptography)
DACS	Distributed Access Control System (Apache)
DACT	DAta Compression Technology
DAD	Desktop Application Director (WordPerfect)
DAD	Duplicate Address Detection (NDP, IPv6)
DADF	Duplex Automatic Document Feeder
DADIU	Danske Akademi for Digital Interaktiv Underholdning (org., Denmark)
DAE	Digital Audio Extraction (CD, audio)
DAEMON	Disk And Execution MONitor (Unix)
DAF	Distributed Application Framework (CCITT)
DAG	DatenAnschaltGeraet
DAG	Directed Acyclic Graph (NVSG)
DAI	??? (Sun)
DAI	Device Application Interface (Novell, Netware, SMS)
DAI	Distributed Artificial Intelligence (AI)
DAIDALOS	Designing Advanced network Interfaces for the Delivery and Administration of Location independent, Optimized personal Services (Europe)
DAIN	Depth-Aware video frame Interpolation (AI)
DAINET	Deutsches AgrarInformationsNETz (WWW, org.)
DAIS	Database Access and Integration Services (GGF, WG, grid, OGSA)
DAIS	Distributed Application Integration System (ORB)
DAISGR	Database Access and Integration Service Group Registry (DAIS, grid)
DAISY	Digital Accessible Information System
DAL	Data Access Language (Apple)
DALI	Distributed Artificial LIfe (AI), "DALi"
DAM	Debian Account Manager (Linux, Debian)
DAM	Digital Asset Management
DAM	Direct Access Method / Mode (DAM, SAM)
DAM	Distributed Abstract Machine
DAM	Draft AMendment (ISO)
DAMLOIL	DARPA Agent Markup Language and Ontology Inference Layer (DARPA, RDF, KM), "DAML+OIL"
DAMQAM	Dynamically Adaptive Multicarrier Quadrature Amplitude Modulation
DANA	De.Admin.News.Announce (Usenet), "D.A.N.A."
DANE	DNS-based Authentication of Named Entities (DNS, DNSSEC, cryptography)
DANTE	Delivery of Advanced Network Technology to Europe (org., Europe)
DANTE	Deutschsprachige ANwendervereinigung TEx [e.v.] (TeX, user group, org.)
DAO	Data Access Objects (DB)
DAO	Destination Address Omitted [flag] (CATNIP)
DAO	Disk At Once (CD-R, SAO)
DAP	Data Access Page (MS, Access)
DAP	Data Access Protocol (DEC, DNA)
DAP	Developer Access Platform
DAP	Developers Assistance Program (IBM)
DAP	Directory Access Protocol (X.500, DS)
DAP	Directory Application Protocol (IN)
DAP	Document Application Profile (JTC1, ODIF, ODA)
DAPE	Distributed Application Programming Environment (ORB)
DAPHNE	Document Application Processing in a Heterogeneous Network Environment
DAPIE	Developer API Extensions (IBM, OS/2, API)
DARI	Database Application Remote Interface (IBM, DB)
DARMP	Defense Automation Resources Management Program (mil., USA)
DARPA	Defense Advanced Research Projects Agency (org., USA)
DARSIMCO	DARtmouth SINplified COde, "Darsimco"
DART	Dynamic Advertising Reporting & Targeting [technology] (WWW, Doubleclick)
DAS	Database Access Service (MS, MOM)
DAS	Direct Attached Storage
DAS	Directory Assistance Service [protocol] (RFC 1202)
DAS	Disk Array Subsystem (Unix, HP-UX)
DAS	Dual Attached Station (FDDI)
DAS	Dual Attachment Station (FDDI, Schneider & Koch)
DAS	Dynamic Allocation Scheme [protocol]
DASD	Direct Access Storage Device
DASH	Dynamic Adaptive Streaming over HTTP (HTTP, MPEG)
DASI	Dial Access Signaling Interface
DASK	Dansk Aritmetisk Sekvens Kalkulator
DASP	Disk Anti Shock Protection (Acer)
DASP	Drive Active, Slave Present (IDE)
DASS	Digital Access Signaling System
DASS	Distributed Authentication Security Service (RFC 1507)
DAT	Digital Audio Tape (Digital audio)
DATEV	DATEnVerarbeitungszentrale der steuerberatenden Berufe (org., Nuernberg, Germany)
DATEX	DATa EXchange
DATEXJ	DATa EXchange - Jedermann (DTAG), "DATEX-J"
DATEXL	DATa EXchange - Leitungsvermittlung
DATEXM	DATa EXchange - Multimegabit (DTAG, SMDS, BIT), "DATEX-M"
DATEXP	DATa EXchange - Packetized / Packetvermittlung (DTAG, X.25), "DATEX-P"
DAU	Digital Annealing Unit (Fujitsu, ASIC)
DAU	Duemmster Anzunehmender User (slang, Usenet, IRC)
DAV	Digital Audio Video (Apple, Digital audio)
DAV	[WWW] Distributed Authoring Versioning (WWW, HTTP)
DAVIC	Digital Audio Visual Interoperatibility Council (org., Digital audio)
DAVID	Digital Audio Video Interactive Decoder (Digital audio)
DAVIS	DAimler-Benz Vertragspartner-InformationsSystem (MBAG)
DAW	Digital Audio Workstation
DAWAK	DAta WArehousing and Knowledge discovery
DAWN	Defense Attache Worldwide Network (network, mil.)
DAX	Data Analysis eXpressions
DAX	Developer API eXtension (OS/2, IBM, API)
DAZ	Denormals Are Zero (FTZ)
DB	DataBase
DB2	DataBase 2 (IBM, DB)
DB2CS	DataBase 2 Client/Server (IBM, DB2, DB), "DB2 C/S"
DB2SDK	DataBase 2 Software Development Toolkit (DB2, IBM, DB), "DB2 SDK"
DBA	DataBase Administrator (DB)
DBA	Drei Buchstaben Akronym
DBA	doing business as
DBAC	DataBase Administration Center (DB)
DBAS	DataBase Administration System (DB)
DBC	Design By Contract
DBC	Device Bay Controller
DBCS	Double-Byte Character Set
DBD	DataBase Description (IBM, DB)
DBDMA	Descriptor Based Direct Memory Access (Apple, DMA)
DBEF	Dual Brightness Enhancement Foile (LCD)
DBEYR	don't believe everything you read
DBI	DataBase Interface (DB)
DBL	DataBase Language (DB)
DBLO	Dual Beam Landing Optimizer
DBLT	Dynamic Back Link Technology (WWW)
DBM	DataBase Manager (DB)
DBME	DataBase Management Environment (DB)
DBMS	DataBase Management System (DB)
DBOS	Disk/Drum Based Operating System (OS)
DBP	DataBase Publishing (DB)
DBP	Delay Bandwidth Product
DBP	Digital Business Platform
DBRAD	Data Base Relational Application Directory (DB)
DBRM	Data Base Request Module (DB)
DBS	Demand-Based Switching (Intel, Xeon)
DBS	Deutscher Bildungs-Server (DFN, WWW)
DBS	Dual Band Simultaneous (WLAN)
DBS	Duplex Bus Selector
DBSC	Dynamic Beam Spot Control (Eizo)
DBTG	Data Base Task Group (CODASYL, DB)
DBVS	DatenBankVerwaltungsSystem (DB)
DC	Data Cartridge
DC	Data-to-Clock [jitter] (DVD)
DC	Device Context
DC	Dublin Core [meta data]
DCA	Data Center Automation
DCA	Defense Communications Agency (org., USA, mil., predecessor, DISA)
DCA	Digital Communication Associates
DCA	Digital Controlled Amplifier (VCA)
DCA	Distributed Communication Architecture (Sperry Univac)
DCA	Document Center Architecture
DCA	Document Content Architecture (IBM, CCS)
DCA2	Dynamic Cache Architecture [level] 2
DCAF	Distributed Console Access Facility
DCAP	Data link switching Client Access Protocol (DLSW, RFC 2114)
DCB	Data Center Bridging (FCoE, QoS)
DCB	Data Control Block
DCB	Disk Coprocessor Board (Novell, SCSI, HBA)
DCBX	Data Center Bridging eXchange (LLDP, DCB)
DCC	DOS Command Center
DCC	Data Communications Computer
DCC	Data Country Code (ATM)
DCC	Desktop Control Center (Intel)
DCC	Digital Content Creation
DCC	Direct Client to Client (IRC)
DCC	Display Combination Code
DCCA	Dependable Computing for Critical Applications (Konferenz)
DCCA	Distributed Component Computing Architecture (Star, C/S)
DCCH	Dedicated Control CHannel (GSM, mobile-systems)
DCCP	Datagram Congestion Control Protocol
DCCS	DisContiguous Shared Segments
DCD	Data Carrier Detect (MODEM, RS-232)
DCDB	Domain Control DataBase (Domain)
DCE	Data Center Ethernet
DCE	Data Circuit terminating Equipment (X.25, CCITT, IBM, HP, DEC, Tandem, Sun)
DCE	Data Communications Equipment
DCE	Distributed Computing Environment (OSF)
DCE	[picture publisher] Digital Camera Edition (Micrografx)
DCERPC	Distributed Computing Environment / Remote Procedure Call (DCE, RPC), "DCE/RPC" , "DCE RPC"
DCF	Design rule for Camera File system (JEIDA, photo)
DCF	Distributed Coordination Function (MAC, 802.11a, WLAN)
DCHSDPA	Dual Cell High Speed Downlink Packet Access (HSDPA, mobile-systems), "DC-HSDPA"
DCI	Data Capture Interface (UMA)
DCI	Device Control Interface
DCI	Digital Cinema Initiative (DCI, org.)
DCI	Display Control Interface (MS, Windows, Intel)
DCIE	Data Center Infrastructure Efficiency, "DCiE"
DCL	DEC Control Language (DEC)
DCL	Data Center Linux (Linux, OSDL)
DCL	Data Control Language
DCL	Digital Command [scripting] Language (DEC, VMS)
DCLU	Digital Carrier Line Unit
DCLZ	Data Compression Lempel-Ziv
DCM	Digital Carrier Module
DCM	Domain Controller Master (Debian, Univention)
DCM	Dual Chip Modul
DCM	Dual Core Modul (IBM, QCM)
DCME	Digital Circuit Multiplication Equipment
DCNA	Data Communication Network Architecture
DCO	Device Configuration Overlay (ATA)
DCO	Digital Controlled Oscillator
DCOF	Digital Print Order Format
DCOM	Distributed Component Object Model (COM, MS, OLE, ActiveX)
DCOP	Desktop COmmunication Protocol (Linux, KDE)
DCP	Data Compression Protocol (Motorola)
DCP	Digital Cinema Package (DCI)
DCPMM	[Optane] Data Center Persistent Memory Module
DCPS	Data Communications Protocol Standards
DCR	Design Change Request (AIX, IBM)
DCRC	Digital Cellular Radio Conference (GSM, conference, mobile-systems)
DCS	Damage Cleanup Service (Firewall, TrendMicro)
DCS	Data sharing Control System (NEC)
DCS	Defense Communications System (mil., USA)
DCS	Desktop Color Separation
DCS	Digital Cellular System (mobile-systems)
DCS	Digital Colour System (Adobe, Photoshop)
DCS	Digital Control System (NEC)
DCS	Digital Cross-connect System (DEC)
DCS	Distributed Control System
DCS	Dogital Camera System
DCSDFS	Dynamic Channel Selection/Dynamic Frequency Selection (HiperLAN/2, WLAN), "DCS/DFS"
DCSS	Digital Cinema System Specification (DCI)
DCT	Data Collection Terminator (BTX)
DCT	Defect-and-Change-Management (CICS, IBM)
DCT	Discrete Cosine Transformation (MPEG, JPEG)
DCTCP	Data Center Transmission Control Protocol (TCP), "DP TCP"
DCTN	Defense Commercial Telephone Network (mil., USA, network)
DCU	Data Cache Unit (CPU, POWER)
DCUO	DC Universe Online (MMORPG)
DD	Dansk Dataforening (org., Denmark)
DD	Data Dictionary (SA, CASE, DB)
DD	Depacketization Delay
DD	Double Density [disks] (FDD)
DDA	Domain Defined Attribute (Domain)
DDA	Dynamic Data Authentication (EMV, cryptography)
DDBAC	Data-Design HBCI Banking Application Components (HBCI)
DDBMS	Distributed DataBase Management System (DBMS, DB)
DDC	Device Color Characterization (XCMS)
DDC	Display Data Channel (VESA)
DDC2B	Device Data Channel [standard], level 2B (DDC)
DDCD	Double Density Compact Disk (CD, Sony)
DDCDR	Double Density Compact Disk - Read (Sony, CD), "DDCD-R"
DDCDRW	Double Density Compact Disk - Read Write (Sony, CD), "DDCD-RW"
DDCMP	Digital Data Communication Message Protocol
DDCS2	Distributed Database Connection Services /2 (IBM, DB, DRDA), "DDCS/2"
DDD	Data Display Debugger (GNU)
DDD	Domain Driven Design (MDA)
DDDS	Dynamic Delegation Discovery System (ENUM, RFC 3401/3402/3403/3404/3405)
DDE	DatenenDEinrichtung
DDE	Dynamic Data Exchange
DDEP	Dynamic Data Execution Prevention (DEP)
DDES	Digital Data Exchange System (ANSI)
DDF	Data Decryption Field (cryptography)
DDI	Device Dependent Interface
DDI	Device Driver Interface
DDIMM	Dual [RAS] Dual Inline Memory Module (DIMM, RAS), "D-DIMM"
DDK	Device Development / Driver Kit (MS)
DDL	Data Definition Language
DDL	Document Description Language
DDM	Direct Drive Monitor
DDM	Distributed Data Management (IBM, CCS)
DDML	Display Driver Management Layer
DDN	Defense Data Network (USA, network, mil.)
DDNS	Distributed Domain Naming Service (TCP/IP)
DDNS	Dynamic Domain Name Service (OS/2, IBM)
DDO	Dynamic Drive Overlay (HDD, Ontrack)
DDOS	Distributed Denial Of Service [attack], "DDoS"
DDP	Datagram Delivery Protocol (AppleTalk)
DDP	Distributed Data Processing
DDR	Double Data Rate (SDR, QDR, ODR)
DDR	Dynamic Desktop Router (Cogent)
DDRAID	Distributed Data RAID (GFS, RAID, HDD), "DDRaid"
DDRS	Defense Data Repository System (mil., USA)
DDRSDRAM	Double Data Rate Synchronous Dynamic Random Access Memory (DRAM, RAM, IC), "DDR-SDRAM"
DDRSRAM	Double Data Rate Static Random Access Memory (RAM, IC)
DDS	Digital Data Service / System
DDS	Digital Data Storage (Sony, HP, DAT, ISO, ANSI, ECMA, Streamer)
DDS	Direct Digital Sampling (CD-RW, SCSI)
DDS	Distributed Directory Service (DCE)
DDSA	Digital Data Service Adapter
DDSDC	Digital Data Storage - Data Compression (DDS, DCLZ), "DDS-DC"
DDSS	Double Dynamic Suspension System (Asus, CD-ROM)
DDT	Dynamic Debugging Tool (DEC, CP/M)
DDTM	Data Dedicated Transmission Mode (CDMA)
DDU	Dialog Data Unit (BTX)
DDV	DES-DES-Verfahren (cryptography, HBCI)
DDV	DatenDirektVerbindung (DTAG)
DDV	Dialog Data Validation
DDVS	Daimler-benz DatenVerbundSystem (MBAG)
DDVT	Dynamic Dispatch Virtual Tables
DDWG	Digital Display Working Group (org., LCD)
DDX	Distributed Data eXchange
DE	DatenElement (HBCI)
DEA	Deterministischer Endlicher Automat
DEBI	DMA Extended Bus Interface (Acorn, DMA)
DEC	Digital Equipment Corporation (manufacturer)
DECIX	DEutscher Commercial Internet eXchange (Internet), "DE-CIX"
DECNET	Digital Equipment Corporation NETwork (DEC)
DECREE	DARPA Experimental Cybersecurity Research Evaluation Environment (DARPA, OS)
DECS	Domino Enterprise Connection Services (Lotus)
DECT	Digital Enhanced Cordless Telecommunications (telecommunication)
DECT	Digital European Cordless Telecommunications (veraltet) (telecommunication)
DECTULE	DECT Ultra Low Energy (DECT), "DECT ULE"
DECUS	Digital Equipment Computer Users Society (org., DEC, user group)
DEE	DatenEndEinrichtung
DEEP	Dynamical ExaScale Entry Platform (Europe)
DEG	DatenElementGruppen (HBCI)
DELNI	Digital Ethernet Local Network Interconnect (ethernet)
DELQA	Digital Ethernet Lowpower Q-bus network Adapter (ethernet)
DELTA	Developing European Learning through Technology Advance
DELUA	Digital Ethernet Lowpower Unibus network Adapter (ethernet)
DELUG	DEutsche Linux User Group (org., user group, Linux)
DEMARC	Distributed Enterprise Management ARChitecture (Banyan, VINES), "DeMarc"
DEMPR	Digital Ethernet Multi-Port Repeater (ethernet)
DEMUDI	DEbian MUltimedia DIstribution (Debian, Linux), "DeMuDi"
DEN	Directory Enabled Networking (MS)
DEN	Document Enabled Networking (Novell, Xerox)
DENIC	DEutsches Network Information Center, (org., Internet), "DE-NIC"
DENIM	Directory-Enabled Net Infrastructure Model (Novell)
DEP	Data Execution Prevention (MS, Windows, XP, SP2)
DEPCA	Digital Ethernet Personal Computer-bus Adapter (ethernet)
DEQNA	Digital Ethernet Q-bus Network Adapter (ethernet)
DER	Distinguished Encoding Rules
DERAT	Data cache Effective to Real Address Translation [table] (Power4, IBM, CPU, ERAT)
DEREP	Digital Ethernet REPeater (ethernet)
DES	Data Encryption Standard (cryptography, NIST, IBM)
DES	Destination End System
DESCBC	Data Encryption Standard/Cipher Block Chaining (DES), "DES/CBC"
DESE	[PPP] Data Encryption Standard Encryption protocol (PPP, RFC 1969)
DESIRE	DEsign by Simulation and REndering om parallel architectures [project] (ESPRIT)
DESP	Data Element Standardization Program
DESPR	Digital Ethernet Single Port Repeater (ethernet)
DESRT	DEStek [group] Real Time (OS, Destek Group), "DES RT"
DESTA	Digital Ethernet thin-wire STation Adapter (ethernet)
DESX	Data Encryption Standard eXtended (DES, cryptography)
DET	Directory Entry Table (Novell, Netware)
DETEBERKOM	DEutsche TElekom BERliner KOMmunikationssystem, "DeTeBerkom" 
DEUNA	Digital Ethernet Unibus Network Adapter (ethernet)
DEVFS	DEVice File System (Linux, DRI), "DevFS"
DEVIL	Developer's Image Library (OpenIL), "DevIL"
DEXA	[conference on] Database and EXpert systems Applications
DF	Direction Flag (assembler)
DF	Disk Free (Unix)
DFCL	Debian Free Content License (Debian, Linux)
DFD	Data Flow Diagram / DatenFlussDiagramm (CASE, SA)
DFD	Deutsches FernerkundungsDatenzentrum (org.)
DFDSM	Data Facility Distributed Storage Management (IBM)
DFG	Deutsche ForschungsGemeinschaft (org.)
DFI	Digital Facility Interface
DFKI	Deutsches Forschungszentrum fuer Kuenstliche Intelligenz (org., KI, AI)
DFM	Dynamic Frequency Management (PDA)
DFN	Deutsches ForschungsNetz [e.V.] (org., ISP)
DFNCERT	Deutsches ForschungsNetz Computer Emergency Response Team (DFN, Internet), "DFN CERT"
DFP	Data Facility Product
DFP	Digital Flat Panel [group / port] (LCD, org., Compaq, Acer, Fujitsu, ATI, Matrox, Samsung, ...)
DFP	Distributed Functional Plane (IN)
DFPP	Digital Flat Panel Port (LCD, DFP)
DFS	Deniable File System (FS)
DFS	Direct File System (Novell, Oracle)
DFS	Disk Filing System (Acorn, FS)
DFS	Distributed File System (DCE)
DFS	Dynamic Frequency Selection (WLAN)
DFS	Dynamic Frequency Selection (WLAN)
DFSA	Direct File System Access
DFSG	Debian Free Software Guidelines (Linux, Debian)
DFT	Discrete Fourier Transformation
DFT	Distributed Function Terminal (IBM)
DFT	Drive Fitness Test (IBM, IDE, HDD)
DFU	Data File Utility (IBM, ADT)
DFUE	DatenFernUEbertragung
DFV	DatenFernVerarbeitung
DGA	Direct Graphics Access (XAA, X-Windows)
DGCC	DISA Global Control Center (DISA)
DGD	Deutsche Gesellschaft fuer Dokumentation [e.v.] (org.)
DGEMM	Double precision GEneral Matrix Multiply (GEMM, BLAS)
DGIS	Direct Graphics Interface Standard
DGP	Dissimilar Gateway Protocol
DGPS	Differential Global Positioning System (GPS)
DGS	Display GhostScript (GNU, GNUStep, PS)
DGSA	Defense Goal Security Architecture (mil., USA)
DGUX	Data General / UniX (Unix), "DG/UX" 
DHCF	Distributed Host Command Facility (IBM, CCS)
DHCP	Dynamic Host Configuration Protocol (TCP/IP, IETF, RFC 2131)
DHES	Direct Heat Exhaust System
DHIS	Distributed Heterogeneous Information Systems
DHT	Distribution Hash Table (P2P)
DHTML	Dynamic HyperText Markup Language (HTML)
DHWG	Digital Home Working Group (org.)
DI	Destination Index [register] (CPU, Intel, assembler)
DI	Digital Intermediate
DIA	Deutsche Informatik Akademie (org.)
DIA	Document Interchange Architecture (IBM, CCS)
DIACAP	Department of defense Information Assurance Certification and Accreditation Process
DIAFYO	did I ask for your opinion?
DIAMOND	Development and Integration of Accurate Mathematical Operations in Numerical Data-processing (ESPRIT)
DIANE	DIrect Access Network for Europe
DIAS	Digital Information Archiving System (IBM, Netherlands)
DIB	DOS Info Block (BIOS, DOS)
DIB	Defense Information Base (mil., USA)
DIB	Device Independent Bitmap (MS, Windows)
DIB	Director Interface Board (Airbus, A380, CIDS)
DIB	Directory Information Base (X.500, DS)
DIB	Dual Independent Bus [architecture] (PC)
DIBL	Drain Induced Barrier Lowering (IC, MOSFET)
DIC	Digital Interface Controller
DICE	Delivering Information in a Cellular Environment (SNI, Internet)
DICF	Dictionary InterChange Format (DICT)
DICOM	Digital Imaging and COmmunications in Medicine
DID	Digital Image Design
DIDW	Deutschland Im Deep Web (Internet), "DiDW"
DIE	Debugging Information Entry
DIESEL	Dumb Interpretatively Evaluated String Expression Language (carCAD)
DIF	Directory Interoperability Forum (org., IBM, Lotus, Novell, Oracle, ...)
DIF	Document Interchange Format
DIFMOS	Double Injection Floating Gate MOS
DIFS	Distributed Coordination Function - InterFrame Space (MAC, 802.11a, DCF, IFS)
DIGI	Deutsche InteressenGemeinschaft Internet [e.v.] (org., ISP)
DII	Defense Information Infrastructure (mil., USA, DISA)
DII	Dynamic Invocation Interface
DIICC	Defense Information Infrastructure Control Concept (mil., USA)
DIICOE	Defense Info Infrastructure Common Operating Environment (DISA, mil., USA), "DII COE"
DIL	Dual InLine
DILA	Digital Direct Drive Image Light Amplifier (JVC, CMOS, LCOS, HDTV), "D-ILA"
DIME	DIrect Memory Execute (AGP)
DIME	Desktop Integrated Media Environment (COSE)
DIMM	Dual Inline Memory Module (IC)
DIMSS	DSN Integrated Management Support System (DSN, mil., USA)
DIN	Deutsches Institut fuer Normung (org.)
DINAH	Desktop INterface to AUTODIN Host (carDIN, mil., USA)
DINI	Deutsche Initiative fuer Netzwerkinformation Org., Germany
DINO	Deutsches InterNet Organisationssystem (WWW, Uni Goettingen, Germany)
DIO	Direct Input Output (I/O, HDD, SCSI)
DIP	Density-Independent Pixel (DP, SIP, SP)
DIP	Dial-up Internet Protocol (Linux)
DIP	Dual In-line Package (IC, DRAM)
DIPM	Device Initiated Power Management
DIRMU	DIstributed and Reconfigurable MUltiprocessor (MP)
DIS	Defense Information System (mil., USA)
DIS	Digital Identification Signal (HDLC)
DIS	Draft International Standard (ISO)
DISA	Data Interchange Standards Association (org.)
DISA	Defense Information Systems Agency (org., mil., USA)
DISAIS	DISA Information System (mil., USA), "DISA-IS"
DISANET	DISA Information Network (mil., USA, DISA, network), "DISANet"
DISC	Defense Information System Council (mil., USA)
DISK	Deutschsprachige Internationale SAS-benutzer Konferenz
DISN	Defense Information Systems Network (mil., USA)
DISNET	Defense Integrated Secure Network (network, mil., USA, predecessor, DSNET)
DISNNT	Defense Information Systems Network - Near Term (DISN, mil., USA), "DISN-NT"
DISOSS	DIStributed Office Support System (IBM, MVS)
DISP	Directory Information Shadowing Protocol
DISP	Draft International Standardized Profiles (ISO)
DISP	Dutch Independent Shareware Programmer (org., Netherlands), "D.I.S.P."
DISSP	Defense Information System Security Program (mil., USA)
DIT	Directory Information Tree (X.500, LDAP)
DITA	Darwin Information Typing Architecture (XML, IBM, OASIS)
DITCO	Defense Information Technology Contracting Office (org., mil., DISA, USA)
DITSCAP	Department of defense Information Technology Security Certification and Accreditation Process (DIACAP)
DITU	Data Interception Technology Unit
DIU	Digital Interface Unit
DIVE	Direct Interface Video Extensions (IBM, MMPM/2)
DIVX	DIgital Video eXpress (DVD), "Divx"
DIX	DEC, Intel, Xerox (ethernet, DEC, Intel, Xerox)
DIY	do it yourself
DJGCC	DJ's GNU C Compiler (GNU, DOS, GCC)
DJGPP	DJ's GNU Programming Platform (GNU, DOS, GPP)
DKDC	don't know, don't care
DKE	Deutsche Kommission Elektrotechnik, elektronik, informationstechnik (org., DIN, VDE)
DKIM	Domain Keys Identified Mail (Domain, RFC 6376)
DKMS	Dynamic Kernel Module Support (Linux)
DKRZ	Deutsches KlimaRechenZentrum (org.)
DL	Distribution List
DL	Dual / Double Layer (DVD)
DLC	Data Link Control
DLCI	Data Link Connection Identifier (ATM)
DLD	Deutsche Linux Distribution (Linux)
DLE	Data Link Escape
DLG	Digital Line Graph
DLHP	Deutsche Linux Howto Project (Linux)
DLJ	Distro License for Java (JRE, Linux)
DLKL	??? (DB)
DLL	Delay / Digitally Locked Loop (GDR-SDRAM)
DLL	Dynamic Link Library
DLL	Dynamic Link Loader (BS2000)
DLM	Distributed Lock Manager (Linux, RedHat, GFS)
DLMZB	Determine Left Most Zero Byte (IBM, PowerPC)
DLNA	Digital Living Network Alliance (org.)
DLP	Digital Light Processing (TI)
DLP	Discrete Logarithmic Problem
DLPI	Data Link Provider Interface (X/Open)
DLR	Dynamic Language Runtime (MS)
DLR	Dynamic Link Routine
DLS	DOS LAN Services (IBM, LAN Server)
DLS	DownLoadable Sounds
DLSS	Deep Learning Super Sampling (Nvidia)
DLSW	Data Link SWitching (APPN, MPTN, RFC 1795, SNA, NETBIOS), "DLSw"
DLT	Digital Line Tape (DEC, Streamer)
DM	DeMilitarisierte zone (Firewall)
DM	Delta Modulation
DM	Development Machine (Corel)
DM	Device Mapper (Linux)
DM	Disconnect Mode (LAPB)
DM	direct message
DM	dungeon master
DMA	Direct Memory Access (DMA)
DMAC	Direct Memory Access Controller
DMAP	DECT Multimeda Access Protocol (DECT)
DMAP	Digital Media Access Protocol (Apple)
DMARC	Domain-based Message Authentication, Reporting & Conformance (SPF, DKIM, RFC 7489)
DMB	Digital Multimedia Broadcasting (DTAG, Blaupunkt, DAB, MPEG)
DMC	Desktop Multimedia Conferencing
DMCA	Digital Millennium Copyright Act (USA, DRM)
DMD	Device Manager Driver (OS/2)
DMD	Differential Mode Delay (Gigabit-, ethernet)
DMD	Digital Mars D [compiler]
DMD	Digital Micromirror Device (IC, DLP, TI)
DMD	Digital Multilayer Disk
DMD	Directory Management Domain (OSI, DS)
DMDAC	Dual MAC Dual Attached Concentrator (FDDI, DAC)
DMDD	Distributed Multiplexing Distributed Demultiplexing
DMDF	Distributed Management Data Facility (DCE, DME)
DME	Direct Memory Execution
DME	Distributed Management Environment (OSF)
DME	durable medical equipment
DMEPOS	durable medical equipment, prosthetics, orthotics and supplies
DMERT	Duplex Multiple Environment, Real Time (OS, MERT)
DMF	Digest Message Format (Internet, RFC 1153)
DMF	Distribution Media Format [diskette] (FDD)
DMFC	Direct Methanol Fuel Cell
DMI	Definition of Management Information (OSI)
DMI	Desktop Management Interface (DTMF, DMI, BIOS)
DMI	Digital Multiplexed Interface
DML	Data Manipulation Language
DML	Data Manipulation Logic
DML	Distributed Mode Loudspeaker (audio)
DMMV	Deutscher MultiMedia Verband (org.)
DMOS	Diffusion Metal Oxide Semiconductor (IC)
DMP	Designated Mailers Protocol (SPAM)
DMP	Dot Matrix Printer
DMS	Data Management System
DMS	Data Management System (ESA, Venus-Express)
DMS	Defense Message System (mil., USA)
DMS	Digital Multiplexed System
DMS	Disk Monitor System (OS, IBM)
DMS	Distributed Media Services (COSE)
DMS	Document Management System
DMS	Document Management System (CMS)
DMSC	Drive Motor Speed Control
DMSCMS	Display Management System/Conversional Monitor System, "DMS/CMS" 
DMSIG	Defense Message System Implementation Group (org., DMS, mil., USA)
DMSP	Distributed Mail System Protocol (Internet)
DMSTWG	Defense Message System Transition Working Group (org., DMS, mil., USA)
DMT	Discrete Monitor Timings (VESA)
DMT	Discrete Multitone Technology (ADSL, Amati Communications, ANSI)
DMTF	Desktop Management Task Force
DMTF	Distributed Management Task Force
DMTU	Default Maximum Transmission Unit (MTU), "D-MTU"
DMU	Data Management Unit (ZFS)
DMU	Data Manipulation Unit
DMU	Digital Mock-Up
DMV	Daten- und MedienVerlag
DMV	Deutsche Mathematiker-Vereinigung (org.)
DMX	Distributed Multihead X (X-Windows)
DMZ	DeMilitarized Zone (LAN, Internet)
DMZ	demilitarized zone
DN	Distinguished Name (X.500, LDAP)
DN	Distribution Network
DNA	Digital Network Architecture (DEC)
DNA	Direct Network Attach (Xyratex, RAID)
DNA	Distributed Network Architecture (NCR)
DNAE	DatenNetz-AnschlussEinrichtung (DTAG)
DNAT	Dynamic Network Address Translation
DNB	Dedicated Network Bus (Intel, MCH, CSA)
DNC	Direct Numerical Control (CNC)
DNC	Dynamic Network Controller
DNCMPE	Direct Numerical Control / ??? (CNC), "DNC/MPE"
DNCP	[PPP] DECNet phase iv Control Protocol (RFC 1762, DECNET, PPP)
DNCRI	Division of Networking and Communication Research and Infrastructure
DND	Den Norske Dataforening (org., Norway)
DND	do not disturb
DNF	did not finish
DNFT	do not feed troll
DNHR	Dynamic Non Hierarchical Routing
DNI	DECnet Network Interface
DNI	De.Newusers.Info (Usenet)
DNI	Digital New Initiative (Google, Europe)
DNIC	Data Network Identification Code (X.121)
DNN	Deep Neural Networks
DNP	Distributed Network Protocol
DNQ	De.Newusers.Questions (Usenet)
DNR	Digital Noise Reduction
DNS	Domain Name System (Internet, RFC 1034/1035, DNS)
DNSO	Defense Network Systems Organization (org., USA, mil.)
DNSO	Domain Name Supporting Organization (org., ICANN)
DNSRR	Domain Name Service Round Robbing (DNS)
DNSTAN	Digitale NebenSTellenANlagen (DTAG), "DNStAn"
DNUG	Deutsche Notes User Group [e.v.] (org., user group, Lotus)
DNX	Departmental Network eXchange [bridging router] (SNA, SDLC, Proteon)
DO	Distributed Objects (NeXT)
DOA	dead on arrival
DOAG	Deutsche Oracle AnwenderGruppe [e.V.] (Oracle, user group, org.)
DOAM	Distributed Office Applications Model (ISO, IEC, DIS 10031-1 f.)
DOAP	Description of a Project (XML)
DOC	De.Org.CCC (Usenet, CCC)
DOCC	DISA Operations Control Complex (DISA, mil., USA)
DOCSIS	Data Over Cable System Interface Specification (DOCSIS)
DOCSISOSS	DOCSIS Operations Suport Services (DOCSIS), "DOCSIS-OSS"
DODISS	Department Of Defense Index of Specifications and Standards (mil., USA)
DOE	Depends On Experience
DOE	Distributed Objects Everywhere (Sun)
DOH	DNS Over HTTPS (DNS, HTTPS), "DoH"
DOI	Digital Object Identifier (IDF)
DOM	Disk On Module
DOM	Document Object Model (MS, Java)
DOM	Document Object Module (HTML, XML, API)
DOMAIN	Distributed Operating Multi Access Interactive Network (Apollo, DOMAIN)
DOME	Distributed Object Management Environment (ORB)
DOMF	Distributed Object Management Facility (Sun)
DOOM	Decentralised Object Orientated Machine
DOP	Directory Operational binding management Protocol
DOPE	Dartmouth Oversimplified Programming Experiment
DOS	Denial Of Service [attack], "DoS"
DOS	Disk Operating System (OS, IBM, MS, ..., PC, Apple, RCA Spectra 70)
DOS15	Disk Operating System - 15 (OS, DEC, PDP 15), "DOS-15"
DOS360	Disk ??? Operating System / 360 (OS, IBM S/360), "DOS/360"
DOSS	Dedicated Office Systems and Services
DOSVS	Disk Operating System / Virtual Storage (OS, IBM S/370), "DOS/VS"
DOSVSE	Disk ??? Operating System / Virtual Storage Extended (OS, IBM 43XX, DOS/VS, VSE), "DOS/VSE"
DOT	DNS Over TLS (DNS, TLS, RFC 7858), "DoT"
DOT	Digital Only Token
DOT	Dynamic Overclocking Technology (FSB, MCI), "D.O.T."
DOT	Dynamic Overclocking Tool (graphic, MSI), "D.O.T."
DOV	Data Over Voice [MODEM]
DOW	Direct OverWrite (MO, ...)
DP	Data Processing
DP	Density-independent Pixel (DIP, SIP, SP)
DP	Detection Point (IN)
DP	Draft Proposal (ISO)
DP	[RAID] Double Parity (RAID, Network Appliance, HP)
DPA	Distributed Password Authentication
DPB	Drive Parameter Block (DOS, BIOS, FDD, HDD)
DPBO	Downstream Power Back Off (DSLAM)
DPC	DIMM Per Channel (DIMM)
DPC	Data Protection Commissioner
DPC	Database Promotion Center (org., Japan, DB)
DPC	Deferred Procedure Call (MS, Windows)
DPC	Dots Per Centimeter (DPI)
DPCL	[Linux] Dynamic Probe Class Library (Linux)
DPCM	Differential Pulse Code Modulation (PCM)
DPCX	Distributed Processing Control eXecutive (IBM)
DPD	Dead Peer Detection (Internet, Firewall)
DPD	Differential Phase Detection
DPE	Distributed Processing Environment (IN)
DPF	Discrete Packet Format (Exabyte, VXA, Streamer)
DPG	Deutsche Physikalische Gesellschaft (org.)
DPI	Data Processing Installation
DPI	Deep Packet Inspection (TCP/IP, UDP)
DPI	Dots Per Inch (DPC)
DPI	[SNMP] Distributed Program Interface (SNMP, RFC 1228)
DPI	[SNMP] Distributed Protocol Interface (SNMP, RFC 1592)
DPL	Debian Project Leader (Linux, Debian)
DPL	Descriptor Privilege Level (OS/2, NT)
DPM	Defects Per Million
DPM	Dynamic Power Management (AMD, GPU)
DPMA	Data Processing Management Association (org.)
DPMA	Demand Priority Access Method
DPMI	DOS Protected Mode Interface (DOS, MS, Intel)
DPMS	DOS Protected Mode Services (Novell, DOS)
DPMS	Display Power Management Signalling [standard] (VESA)
DPN	Data Packet Network (Nortel)
DPN	Data Processing Node (MODEM)
DPN	Deutsches Provider Network (ISP)
DPNPH	Data Packet Network-Packet Handler, "DPN-PH" 
DPNSS	Digital Private Network Signaling System (British Telecom)
DPOE	DOCSIS Provisioning Over EPON (DOCSIS, EPON), "DPoE"
DPOF	Digital / Direct Print Order Format (printing)
DPP	Data Parallel Processor (ATI)
DPP	Distributed Parallel Processing
DPQ	Data Processing Quality
DPRL	Digital Property Rights Language (Xerox)
DPS	Display PostScript (NeXT, GUI, NextStep, DPS)
DPS	Distributed Path Selection (FC)
DPS	Dual Power System (Gigabyte)
DPSE	Display PostScript Engine (DPS, NextStep, OpenStep, Apple, Rhapsody)
DPSK	Differential Phase Shift Keying (telecommunication)
DPT	Distributed Processing Technology (manufacturer)
DPT	Drive Parameter Table
DPT	Dynamic Packet Transport (Cisco)
DPV	DatenPaketVermittlung[srechner]
DPV	Delegated Path Validation (cryptography)
DPWS	Devices Profile for Web Services (WWW)
DQDB	Distributed Queue Dual Bus (ISO, IEC, IS 8802/6, IEEE 802.6)
DQL	Database Query Language (DB)
DQP	Distributed Query Processing (OGSA-DAI, grid)
DQP	Distributed Queueing Protocol
DQS	Distributed Queueing System (Cluster)
DR	Designated Router (PIM, Multicast)
DR	Developer Release (Linux, Apple, ...)
DR	Digital Research (manufacturer)
DR	Dynamic Reconfiguration (Solaris, Sun)
DRAC	Dell Remote Access Card (Dell, BMC)
DRACO	DECT Radio Communications Controller (DECT, Hagenuk, University of Manchester)
DRAM	Dynamic Random Access Memory (RAM, IC)
DRB	DRAM Row Boundary [register] (DRAM, PCI)
DRB	Distributed RuBy (Ruby), "DRb"
DRBG	Deterministic Random Bit Generator
DRC	Design Rule Check (CAD, LVS)
DRCS	Distributed Revision Control System (DVCS)
DRD	Data Reading Device
DRDA	Distributed Relational Database Architecture (IBM, DB)
DRDAAS	Distributed Relational Database Architecture Application Server (IBM, DB), "DRDA AS"
DRDIMM	Double Rank Dual Inline Memory Module (IC, DIMM), "DR-DIMM"
DRDOS	Digital Research Disk Operating System (DR, OS), "DR-DOS"
DRE	Direct Recording Electronic
DRE	Distributed Real-time and Embedded [systems]
DREN	Defense Research and Engineering Network (network)
DRF	Data Recovery Field (cryptography)
DRG	Developer Relations Group (MS)
DRI	Defense Research Internet (ARPANET, successorr, network)
DRI	Direct Rendering Infrastructure (XFree86)
DRIM	DResden Identity Management
DRIP	Designated Relays Inquiry Protocol (SPAM)
DRL	Document Revocation List (TCPA)
DRL	Dynamically Reconfigurable Logic (RL)
DRM	Destination Release Mechanism (DQDB)
DRM	Digital Radio Mondiale
DRM	Digital Rights Management (MS, DRM)
DRMU	Digital Remote Measurement Unit
DRP	DECnet Routing Protocol (DEC)
DRP	Dynamic Resource Pool (Solaris, Sun)
DRPM	Dynamic Rotations Per Minute (HDD)
DRS	Data Retrieval and Storage
DRS	Development Requirement Specification
DRS	Directory Replication Service (MS, AD)
DRS	Double-Ring-with-Star [topology]
DRSN	Defense Red Switch Network [hopefully no traffic ever] (network, mil. USA)
DRY	don't repeat yourself
DS	Data Segment [register] (CPU, Intel, assembler)
DS	Data Structure (TYPO3)
DS	Deutschsprachige Shareware (org.)
DS	Digital Services [level]
DS	Directory Service (OSI, ISO, DP 9594)
DS	Distribution Services (SNA)
DS	Distribution System (WLAN)
DS	Double Sided [disks] (FDD)
DS	[Netweaver] Developer Studio
DS0	Digital Signal level 0 (ISDN, T1), "DS-0"
DS1	Digital Signal level 1 (ISDN, T1), "DS-1"
DS1E1	Digital Signal level 1/European 1 (RFC 1406), "DS1/E1"
DS2	Digital Signal level 2, "DS-2"
DS3	Digital Signal level 3 (T3), "DS-3"
DS3E3	Digital Signal level 3/European 3 (RFC 1407), "DS3/E3"
DSA	Data Service Adapter
DSA	Debian Security Announcement (Linux, Debian)
DSA	Debian System Administration (Linux, Debian)
DSA	Digital Signature Algorithm (cryptography, NIST)
DSA	Digital Storage Architecture
DSA	Directory System Agent (X.500, DSA)
DSA	Distributed Systems Architecture (Bull)
DSA	Dynamic Scalable Architecture (DB, Informix)
DSAG	Deutsche SAP AnwenderGruppe (SAP, user group)
DSAP	Destination link Service Access Point (SAP, LLC)
DSAT	Deep Shit Alert Table (Apple, MACOS)
DSBAM	Double-SideBand Amplitude Module
DSBL	Distributed Server Boycott List (SPAM)
DSC	DECT Standard Cipher (DECT, cryptography)
DSC	Desired State Configuration (MS, Windows)
DSC	Desired State Configuration (MS, Windows)
DSC	Display Stream Compression (VESA)
DSC	Document Structuring Conventions (Adobe)
DSCQS	Double Stimulus Continuous Quality Scale (ITU-R BT.500-7)
DSD	Data Structure Diagram (CASE)
DSD	Direct Stream Digital (Sony, Philips, SACD)
DSDC	Data Segment Descriptor Cache [register] (DS, Intel, CPU)
DSDL	Document Schema Definition Language (DB)
DSDT	Differentiated System Description Table (ACPI)
DSE	Data Switching Equipment (X.25, CCITT)
DSE	Distributed Systems Environment (Honeywell, Bull)
DSEA	DataStation Emulation Adapter (IBM, AS/400, ...)
DSEE	DOMAIN Software Engineering Environment (Apollo, CM, DOMAIN)
DSGVO	DatenSchutz-GrundVerOrdnung Germany
DSH	Desperately Seeking Help (slang, Usenet)
DSI	Defense Simulation Internet (network, mil., USA)
DSI	Dial Services Interface [API] (API, IBM)
DSI	Digital Speech Interpolation (VOFR)
DSI	Dynamic Skeleton Interface (CORBA, ORB, OA)
DSI	Dynamic Systems Initiative (MS, MCF)
DSID	Destination Signaling IDentifier
DSIMM	Dual [RAS] Single Inline Memory Module (IC), "D-SIMM"
DSL	Dataset and Snapshot Layer (ZFS)
DSL	Dialogue Scripting Language (DCE, UIL)
DSL	Digital Subscriber Line (DSL)
DSL	Digital system Specification Language (HDL)
DSL	Distributed Service Logic (IN)
DSL	Domain Specific Language
DSLAM	Digital Subscriber Line Access Multiplexer (DSL, ADSL)
DSLCP	Dynamically Switched Link Control Protocol (RFC 1307)
DSM	Digital Standard MUMPS (MUMPS, DEC)
DSM	Domain Specific Modeling
DSM	Dynamic Spectrum Management
DSM	[TWAIN] Data Source Manager (MS, Windows)
DSMCC	Digital Media Storage - Command and Control (DVB), "DSM-CC"
DSML	Directory Services Markup Language (OASIS)
DSMN	Directory Service Manager for Netware (MS, Windows NT, FPNW)
DSN	Data Source Names (ODBC, DB)
DSN	Defense Switched Network (mil., USA)
DSN	Delivery Status Notification
DSN	Developer Support News (IBM, OS/2)
DSN	Distributed Systems Network (HP)
DSNET	Defense Secure NETwork (mil., USA)
DSO	Dynamic Shared Object
DSOM	Distributed System Object Model (IBM)
DSP	Digital Service Provider
DSP	Digital Signal Processing / Processor (audio, video, RL, DSP)
DSP	Direct Socket Protocol (Infiniband)
DSP	Directory System Protocol (X.500, DS)
DSP	Document Services for Printing (Xerox), "DS/P"
DSP	Domain Specific Part (NSAP, IDL. Domain)
DSR	Data Set Ready (MODEM, RS-232)
DSR	Device Status Report
DSR	Digital Signal Richtfunk Mil., Germany
DSRH	Double-Sided RowHammer (DRAM, SSRH)
DSRI	Digital Standard Relational Interface
DSRS	Defense Software Repository System (mil., USA)
DSS	Decision Support System (IM)
DSS	Defense Switched Services (mil., USA)
DSS	Digital Signature Standard (NIST, cryptography)
DSS	Directory and Security Services (DCE, IBM, LAN)
DSS	Distributed Security Service (DCE)
DSS2	[setup] Digital Subscriber Signaling #2
DSSCS	Defense Special Security Communications System (mil., USA)
DSSI	Digital Storage Systems Interconnect (VAX, DEC)
DSSS	Direct Sequence Spread Spectrum (WLAN)
DSSSL	Document Style Semantics and Specification Language (SGML)
DSSSL	[standard] Document Style Semantics and Specification Language (DTD, ISO, IEC, DIS 10179)
DST	Daylight Saving Time (TZ)
DSTM	don't shoot the messenger
DSTN	Double SuperTwisted Nematic (LCD)
DSU	Data Secure Unix (Unix, OS, UCLA)
DSU	Digital Service Unit (ATM)
DSU	Digital Storage Unit
DSU	Distribution Service Unit (IBM, SNADS)
DSV	Digital Signal Verbindung Mil., Germany
DSVD	Digital Simultaneous Voice and Data (MODEM)
DT	Display Terminal
DT	Distributed graphical user interface Toolkit (IBM, GUI, VM/ESA)
DTA	Direct Tape Access (Seagate)
DTA	Disk Transfer Area (DOS)
DTAG	Deutsche Telekom AG Germany, ISP
DTAM	Document Transfer, Access and Manipulation (CCITT, T.400, ODIF)
DTAP	Direct Transfer Application Part (MS, MM, MTP)
DTAZV	DatenTraegeraustausch, belegloser AuslandsZahlungsVerkehr (banking)
DTC	Design Time Controls (MS)
DTC	DeskTop Conferencing
DTC	Distributed Transaction Coordinator (MS, SQL Server, DB)
DTCSA	Digital Transition Content Security Act (USA)
DTD	Document Type Definition (SGML, XML. HTML, DTD)
DTE	Data Terminal Equipment (X.25, CCITT)
DTE	DatenTransferEinrichtung
DTE	Domain and Type Enforcement (TE)
DTH	DialogTestHilfe (BS2000)
DTI	Digital Technology International
DTI	Document Technologies, Inc. (company, USA)
DTK	Deception ToolKit
DTLB	Dual Translation Lookaside Buffer (CPU)
DTLS	Datagram Transport Layer Security (UDP)
DTMF	DeskTop Management task Force (Intel)
DTMF	Dual Tone Multi Frequency
DTML	Document Template Markup Language (ZOPE)
DTMP	DCPS Management Panel (DCPS)
DTMS	Document Transfer and Manipulation Services (CCITT, T.400)
DTO	DeviceTree Overlay (CAN)
DTOS	Distributed Trusted Operating System (OS, DTE)
DTP	DeskTop Publishing
DTP	Distributed Transaction Processing (X/Open, OLTP)
DTP	Document Transfer Profile (SPAC, ODA, DAP, predecessor)
DTR	Data Terminal Ready (MODEM, RS-232)
DTR	DeskTop Replacement [notebook]
DTR	DeskTop Reproduction (DTP)
DTR	Document Filing and Retrieval (DOAM, ISO, IEC, DIS 10166-1 f.)
DTR	Draft Technical Report
DTRT	Do The Right Thing (slang, Usenet, IRC)
DTRT	do the right thing
DTS	Digital Theatre Sound (audio)
DTS	Digital Thermal Sensor (Intel, IC, CPU)
DTS	Direct To SOM
DTS	Distributed Time Server
DTS	Distributed Time Service (DCE)
DTSES	Digital Theatre Sound - Extended Surround (audio), "DTS-ES"
DTSS	Dartmouth Time-Sharing System (OS)
DTT	Dual Transformer Technology (Tangan)
DTTS	Deutsche Telekom Technischer Service (org.)
DTU	Demand Transmission Unit
DTWT	do the wrong thing
DU	Disk Used (Unix)
DU	Distribution Unit (MS, MSIE)
DUA	Directory User Agent (X.500, DS)
DUEE	DatenUEbertragungsEinrichtung
DUEE	DatenUEbertragungsEinrichtung (DTAG)
DUMP	Dial-Up Network Profile (Bluetooth, SPP, DUN)
DUN	Dial Up Networking (Bluetooth, ...)
DUNDI	Distributed Universal Number DIscovery (VoiP), "DUNDi"
DUOW	Distributed Unit Of Work (DRDA, IBM), "DUoW"
DUP	Distribution Unit Profile (MS, OSD, DU, MSIE)
DV	DatenVerarbeitung
DV	Digital Video
DVA	Data Virtual Address (ZFS)
DVA	DatenVerarbeitungsAnlage
DVA	Dynamic Vibration Absorber (CD, DVD, Samsung)
DVB	Digital Video Broadcasting (Europe, DVB)
DVBC	Digital Video Broadcasting - Cable (DVB), "DVB-C"
DVBH	Digital Video Broadcasting - Handheld (DVB), "DVB-H"
DVBNIP	Digital Video Broadcasting - ? (DVB), "DVB-NIP"
DVBRC	Digital Video Broadcasting - ? (DVB), "DVB-RC"
DVBRCGSM	Digital Video Broadcasting - ? (DVB), "DVB-RCGSM"
DVBRCT	Digital Video Broadcasting - ? (DVB), "DVB-RCT"
DVBS	Digital Video Broadcasting - Satellite (DVB), "DVB-S"
DVBT	Digital Video Broadcasting - Terrestic (DVB), "DVB-T"
DVC	Digital Video Compression (video)
DVCS	Distributed / Decentralized Version Control System (DRCS)
DVD	Deutsche Vereinigung fuer Datenschutz [e.V.] (org.)
DVD	Digital Versatile Disk (CD, MPEG, DVD)
DVD	Digital Video Disk [old term] (DVD)
DVDCCA	DVD Copy Control Association (DVD, org.), "DVD CCA"
DVDMRW	Digital Versatile Disk + Mount rainier ReWritable (DVD, DVD+RW, MS), "DVD+MRW"
DVDR	Digital Versatile Disk + Recordable (DVD), "DVD+R"
DVDR	Digital Versatile Disk - Recordable (DVD), "DVD-R"
DVDRA	Digital Versatile Disk - Read (Authoring) (DVD-R, DVD), "DVD-R(A)"
DVDRAM	Digital Versatile Disk Random Access Memory (DVD), "DVD-RAM"
DVDRG	Digital Versatile Disk - Read (General use) (DVD-R, DVD), "DVD-R(G)"
DVDROM	Digital Versatile Disk Read Only Memory (DVD, ROM), "DVD-ROM"
DVDRW	Digital Versatile Disk + ReWritable (PC-RW, DVD, Sony, Philips, HP, Mitsubishi, Ricoh, Yamaha), "DVD+RW"
DVDRW	Digital Versatile Disk - ReWritable (DVD), "DVD-RW"
DVI	DeVice Independent
DVI	Digital Video Interactive [old term] (LCD, Intel, IBM, Lotus, HP, Compaq, ...)
DVI	Digital Visual Interface (DVD, video)
DVID	Digital Video Interactive - Digital (LCD), "DVI-D"
DVID	Digital Video Interactive - Integrated (LCD), "DVI-I"
DVID	Dynamic - Voltage IDentification (Intel, CPU), "D-VID"
DVL	Digital Video Link
DVM	Dalvik Virtual Machine (Android)
DVM	Dynamic Visual Mode (NEC, Mitsubishi, LCD)
DVM	Dynamic Voltage Management (PDA)
DVMA	Direct Virtual Memory Access
DVMRP	Distance Vector Multicast Routing Protocol (IP, Multicast)
DVMT	Dynamic Video Memory Technology (Intel)
DVPT	Deutscher Verbandes fuer Post und Telekommunikation (org.)
DVR	??? (DTP, Truevision)
DVS	DatenVerwaltungsSystem (BS2000)
DVS	Digital Video Systems (manufacturer)
DVST	DatenVermittlungsSTelle (DTAG)
DVSTP	DatenVermittlungsSTelle mit Paketvermittlung (DTAG), "DVST-P"
DVT	Deutscher Verband Technisch-wissenschaftlicher vereine (org.)
DVX	Digital Voice eXchange
DWA	Device-Watchdog-Answer (DWR, Diameter)
DWANGO	Dialup Wide-Area Network Game Organization (IVS Corporation)
DWDM	Dense Wavelength Division Multiplexing [protocol]
DWF	Drawing Web Format (carCAD)
DWH	DISA Western Hemisphere (DISA, mil., USA)
DWH	Data WareHouse (DB)
DWIM	Do What I Mean (telecommunication, Usenet, IRC)
DWIM	do what I mean
DWM	Diskless Workstation Management (AIX, IBM)
DWMT	Discrete Wavelet MultiTone [modulation]
DWR	Device-Watchdog-Request (DWA, Diameter)
DWS	Delphi Web Script (Delphi, Borland, WWW)
DWS	Digital World Services (ISP)
DWT	Discrete Wavelet Transformation
DXA	Directory eXchange Agent
DXI	Data eXchange Interface
DXJ	Datex J (DTAG), "DxJ"
DXJVST	Datex J VermittlungsSTelle (DTAG), "DxJ VSt
DXL	Domino XML Language (XML, Lotus, DTD)
DXR	DirectX Raytracing (MS)
DXS	Directory eXchange Server
DXVA	DirectX Video Acceleration (MS, Windows)
DYK	do you know?
E1	European digital transmission format 1 [2.048 Mbps]
E2	European digital transmission format 2 [8.448 Mbps]
E2E	End To End
E3	End-to-End Encryption (cryptography)
E3	European digital transmission format 3 [34.368 Mbps]
E4	European digital transmission format 4 [139.264 Mbps]
E4M	Encryption 4 Masses (cryptography)
E4X	Ecmascript for XML (ECMA, XML)
E5	European digital transmission format 5 [565.148 Mbps]
EA	Effective Address (Power4, IBM, CPU)
EA	Eingabe/Ausgabe, "E/A" 
EA	Enterprise Agreement (Adobe)
EA	Enterprise Agreement (MS)
EA	Escrowed Authenticator (cryptography, EES)
EA	Extended Attribute (OS/2, Apple)
EA	[Visio for] Enterprise Architects (MS, .NET)
EA	early adopter
EAB	Enterprise Access Builder (IBM, Java)
EAC	Enhanced Audio CODEC (EVD, CODEC)
EACEM	European Association of Consumer Electronics Manufacturers (org., Europe)
EAD	Encoded Archival Description (SGML)
EADAS	Engineering and Administrative Data Acquisition System (EADAS)
EADASNM	EADAS/Network Management (EADAS), "EADAS/NM" 
EADF	Elliptical Aperture with Dynamic Focus
EAF	Export address table Access Filtering
EAI	Enterprise Application Integration
EAI	External Authoring Interface (VRML)
EAL	Evaluation Assurance Level (CC)
EAM	Evanescent Access Method (BS2000)
EAN	European Article Numbering [system]
EANTC	European Advanced Networking Test Center (org., Berlin, Germany, ANTC, FDDI)
EAP	Extensible Authentication Protocol (Cisco, cryptography, RADIUS, WPA)
EAPAKA	Extensible Authentication Protocol method for 3rd generation Authentication and Key Management (EAP, RFC 4187), "EAP-AKA"
EAPD	External Amplifier Power Down
EAPMD5	Extensible Authentication Protocol - Message Digest 5 (EAP, cryptography), "EAP-MD5"
EAPOL	Extensible Authentication Protocol Over LAN (EAP, LAN, cryptography), "EAPoL"
EAPOW	Extensible Authentication Protocol Over Wireless (EAP, WLAN, cryptography), "EAPoW"
EAPS	Ethernet Automatic Protection Switching (LAN, MAN, RFC 3619)
EAPTLS	TLS over EAP (TLS, EAP, WLAN), "EAP-TLS"
EAPTTLS	Extensible Authentication Protocol - Tunneled Transport Layer Security (EAP, cryptography), "EAP-TTLS"
EAPTTSL	Tunneled Transport Layer Security EAP (TTSL, EAP, cryptography, WLAN), "EAP-TTSL"
EAR	Enterprise ARchive (IBM, WBISF)
EARN	European Academic Research Network (network)
EAROM	Electrically Alterable Read Only Memory (ROM, IC)
EAS	Enterprise Access System (Dynatech)
EAS	Enterprise Agreement Subscription (MS, OSL)
EASE	Easy Access System Europe (Novell, FTP)
EASEL		Emergent Algorithm Simulator and Evaluation Language
EASEL	Educator Access to Services in the Electronic Landscape (CORDIS)
EASI	Enhanced Asynchronous SCSI Interface
EASY	ErmittlungsAbhaengiges SYstem (Bavaria)
EATA	Enhanced AT Bus Attachment
EATCS	European Association for Theoretical Computer Science (org., Europe)
EATX	Extended Advanced Technology eXtended [form factor] (ATX), "E-ATX"
EAUE	Elektronische AufenthaltsUEberwachung
EAX	Environmental Audio eXtension (audio, Creative Labs)
EAZ	EndgeraeteAuswahlZiffer (ISDN)
EB	Electronic Banking (banking)
EBA	Electronic Business Assurance, "eBA"
EBAM	Electronic Beam-Addressable Memory (IC)
EBAS	Elektronisches teile-BestellAbwicklungsSystem (MBAG)
EBC	EFI-ByteCode (EFI)
EBC	EISA Bus Controller (Wyse)
EBCDIC	Extended Binary-Coded Decimal Interchange Code
EBCOT	Embedded Block Coding with Optimal Truncation (JPEG)
EBCS	European Committee for Banking Standards (org., Europe, banking)
EBGA	Enhanced Ball Grid Array (BGA, CPU, IC)
EBGP	External Border Gateway Protocol (BGP, iBGP), "eBGP"
EBMS	ebXML Message Service (ebXML, XML), "ebMS"
EBNF	Extended Backus-Naur-Form
EBPF	Extended Berkeley Packet Filter (BPF), "eBPF"
EBR	Enterprise Backup and Restore (ENS, Banyan, VINES)
EBR	Extended Boot Record (MBR)
EBR	External Backup Restore (IDS, Informix, DB)
EBROM	Electronic Book - Read Only Memory (ROM), "EB-ROM" 
EBU	European Broadcasting Union (org., Europe)
EBUS	Elektronisches teile-BUchungsSystem (MBAG)
EBV	Elektronische BildVerarbeitung
EBV	Elektronisches BewerbungsVerfahren
EBXML	Electronic Business eXtensible Markup Language (XML, OASIS, UN/CEFACT, B2B), "ebXML"
EC	Electronic Commerce
EC	Error Correction (MODEM)
EC	Evolutionary Computation
EC3	European CyberCrime Centre (org., Europe)
ECAI	European Conference on Artificial Intelligence (conference, AI, ECCAI, Europe)
ECAL	European Conference on Artificail Life (Europe, AI)
ECASO	Enhanced Cooling After System Off
ECB	Electronic CodeBook [mode] (cryptography, DES)
ECB	Event Control Block (IPX)
ECC	Electrical Connectivity Checks (CAD)
ECC	Elliptic Curve Cryptosystem (Certicom, cryptography)
ECC	Error Checking and Correction
ECC	Error Correction Circuit (CPU, POWER)
ECC	Error Correction Code (CD, EDC)
ECCAI	European Coordinating Committee for Artificial Intelligence (org., AI, Europe)
ECCO	Execute with Correct Checksum Only
ECCRAM	Error Checking and Correction ??? Random Access Memory (RAM)
ECD	Energy Conversion Devices (manufacturer, OUM)
ECDC	Electronic Commerce for Developing Countries (ITU)
ECDH	Elliptic Curve Diffie-Hellman (cryptography)
ECDL	European Computer Driving License
ECDSA	Elliptic Curve Digital Signature Algorithm (cryptography)
ECEDI	Electronic Commerce/Electronic Data Interchange (EC, EDI), "EC/EDI"
ECF	Enhanced Connectivity Facilities (IBM)
ECHO	European Community Host Organisation (org., Europe)
ECHT	European Conference on Hypermedia Technology (INRIA, conference)
ECI	Efficient Channel Integration (ADC, EDI)
ECI	European Color Initiative (org., Europe, DTP)
ECIS	European Committee for Interoperable Systems (org.)
ECIX	European Commercial Internet eXchange (company)
ECL	EClectic Language (Harvard, TOPS)
ECL	Emitter Coupled Logic
ECM	Enterprise Content Management
ECM	Entity Coordination Management (FDDI, SMT)
ECM	Error Correction / Correcting Mode (FAX, HDLC)
ECMA	European Computer Manufacturers Association (org., Europe)
ECMP	Electroning Commerce Modeling Language (RFC 4112)
ECMS	Enterprise Content Management System (CMS)
ECN	European Counter Network
ECN	Explicit Congestion Notification (IP, RFC 2481)
ECNE	Enterprise Certified Novell Engineer (Novell, Netware)
ECOC	European Conference on Optical Communications (Konferenz)
ECOM	Electronic Computer Originated Mail, "E-COM" 
ECOOP	European Conference on Object Orientated Programming (OOP, conference)
ECP	Enhanced Capability Port (MS)
ECP	Enhanced Communication Port / Protocol
ECP	Excessive CrossPosting (Usenet, EMP, spam)
ECP	[PPP] Encryption Control Protocol (PPP, RFC 1968)
ECPA	Electronic Communications Privacy Act (USA)
ECR	Engineering Change Request (PCI)
ECR	electronic cash register
ECRC	[cable & wireless] European Computer industry Research Centre [gmbh] (ISP, org.)
ECRM	Electronic Customer Relationship Management (Internet), "eCRM"
ECRYPTFS	Enterprise Cryptographic FileSystem (Linux, FS), "EcryptFS"
ECS	EComStation (OS/2), "eCS"
ECS	Elitegroup Computer Systems (manufacturer, Taiwan)
ECS	Enhanced Chip Set (Amiga, Commodore)
ECS	Esports Championship Series
ECSA	Exchange Carriers Standards Association (org.)
ECSC	European Customer Support Centre (HP)
ECSD	Enhanced Circuit Switched Data (8-PSK, mobile-systems)
ECTEG	European Cybercrime Training and Education Group (org., Europe), "E.C.T.E.G."
ECTS	European Computer Trade Show (fair, London)
ECU	EISA Configuration Utility (EISA)
ED	End Delimiter (FDDI, Token Ring)
ED	Enhanced Density
EDA	Electronic Design Automation (RL, IC)
EDAC	Electromechanical Digital Adapter Circuit
EDAC	European Conference on Design Automation (IEEE-CS, conference)
EDBS	Einheitliche DatenBank-Schnittstelle (DB)
EDC	Electrical Design Current (TDC)
EDC	Error Detection Code (CD, ECC)
EDCF	Enhanced Distributed Coordination Function (MAC, 802.11a, DCF, QOS)
EDD	Enhanced Disk Device [polling] (BIOS, Linux)
EDD	Enterprise Data Distribution (ENS, Banyan, VINES)
EDFA	Erbuim Doped Fiber Amplifier (FO)
EDGAR	Electronic Data Gathering, Analysis, and Retrieval [system] (DB, Internet)
EDGE	Enhanced Data rate for GSM / Global Evolution (GSM, mobile-systems)
EDI	Electronic Data Interchange (GOSIP)
EDID	Extended Display Identification Data [standard] (VESA, DDC)
EDIF	Electronic Design Interchange Format
EDIFACT	Electronic Data Interchange For Administration, Commerce and Transport
EDL	Edit Decision List (video)
EDLC	Ethernet Data Link Control (ethernet)
EDM	Engineering Data Management
EDM	Extended Data Message
EDMCC	European Distributed Memory Computing Conference (GI, ITG, IFIP, conference)
EDMS	Engineering Document Management System
EDO	Extended Data Out [RAM] (RAM, DRAM, IC)
EDODRAM	Extended Data Out Dynamic Random Access Memory (RAM), "EDO-DRAM" 
EDORAM	Extended Data Out Random Access Memory (RAM, IC), "EDO-RAM"
EDOS	Elektronisches DateiOrganisationsSystem (MBAG)
EDP	Electronic Data Processing
EDP	Embedded DisplayPort, "eDP"
EDP	Enhanced Dot Pitch (Hitachi)
EDPB	European Data Protection Board (org.)
EDPS	Electronic Data Processing System
EDPS	European Data Protection Supervisor
EDR	Endpoint Detection and Response
EDR	External Developer Release
EDRAM	Embedded Dynamic Random Access Memory (RAM, DRAM, IC), "eDRAM"
EDRAM	Enhanced Dynamic Random Access Memory (RAM, DRAM, IC)
EDRI	European Digital RIghts (org., Europe), "EDRi"
EDS	Electronic Data Systems [corporation] (provider, USA)
EDS	eternal downward spiral
EDSA	Europaeischer DatenSchutzAusschuss (org.)
EDSAC	Electronic Delay Storage Automatic Calculator
EDSAP	Early Detection Sensor and Algorithm Package (Samsung)
EDSFF	Enterprise and Datacenter Storage Form Factor (Intel, Samsung, Facebook)
EDSRA	Earth Data System Reference Application (ISH, USA)
EDT	Eastern Daylight Time [-0400] (TZ, EST, USA)
EDV	Elektronische DatenVerarbeitung
EDVAC	Electronic Discrete Variable Automatic Computer
EDX	Event-Driven eXecutive (OS, IBM)
EE	Emotion Engine (Sony, Playstation)
EE	Energy Efficient (AMD, TDP)
EEAG	Elektro- und ElektronikAltGeraete
EEE	Energy Efficient Ethernet (IEEE)
EEE	[UDB] Enterprise Extended Edition (IBM, DB2, DB, UDB)
EEHPCWG	Energy Efficient HPC Working Group (org., HPC, WG)
EEI	Equipment to Equipment Interface
EEI	External Environment Interface (mil., USA)
EELS	Engineering Electronic Library, Sweden (org., WWW, Sweden)
EEM	External Expansion Module (Sun)
EEMS	Enhanced Expanded Memory Specification
EEP	Early Experience Program (Borland)
EEP	EnOcean Equipment Profile
EEP	Entry Exit Procedure (R:Base, DB)
EEPROM	Electrically Erasable Programmable Read Only Memory (ROM, IC, RL, EPROM)
EES	Escrowed Encryption Standard (cryptography, NSA)
EESA	Enterprise Extensions SMART Accessed (WD, ATA)
EESC	European EDIF Steering Committee (org., EDIF, Europe)
EESSI	European Electronic Signature Standardization Initiative (org., ETSI)
EET	Eastern European Time [+0200] (TZ)
EET	Edge Enhancement Technology (Seikosha, Itoh)
EFAKS	Elektronisches FAKturierungs- und abrechnungsSystem (MBAG)
EFB	Electronic Flight Bag (Airbus, A380)
EFCI	Explicit Forward Congestion Indication (ATM)
EFF	Electronic Frontier Foundation (Internet, org.)
EFI	Electronics For Imaging (manufacturer)
EFI	Extended Firmware Interface (Intel, MS)
EFI	Extensible Firmware Interface [old term] (Intel, Itanium, MS)
EFL	Eiffel Forum License (Eiffel)
EFL	Emitter Follower Logic (IC)
EFL	Enlightenment Foundation Libraries (GUI)
EFM	Eight-to-Fourteen-Modulation (CD-DA, CD-ROM, CD)
EFNET	Eris Free NETwork (Network, IRC), "EFnet"
EFS	Elektronischer FahrSchein
EFS	Encrypting File System (cryptography, Windows, MS, DESX)
EFSM	Extended Finite State Machine (TTCN, ...)
EFT	Electronic Funds Transfer
EFT	Euro-FileTransfer (ISDN, ETS 300 075)
EFT	electronic funds transfer
EFTPOS	Electronic Funds Transfer at the Point-Of-Sale (EFT, banking), "EFT-POS"
EFTS	Electronic Funds Transfer System
EFUE	EmmissionsdatenFernUEbertragung (telecommunication)
EG	Evil Grin (slang, Usenet, IRC)
EG	evil grin
EGA	Enhanced Graphics Adapter (predecessor, VGA)
EGA	Enterprsie Grid Alliance (org., grid, EMC, FSC, HP, Intel, Oracle, ...)
EGB	Elektrostatisch gefaehrdete Bauelemente
EGD	Entropy Gathering Daemon (Unix, GNU, GnuPG)
EGD	Ethernet Global Data
EGEE	Enabling Grids for E-sciencE (Europe, Europe)
EGG	Elektronischer Geschaeftsverkehr-Gesetz Germany
EGMS	E-Government Metadata Standard (RSS, UK)
EGO	Enterprsie Grid Orchestrator
EGOV	Electronic GOVernment
EGP	Exterior Gateway Protocol (RFC 904)
EGPA	Erlangen General Purpose Array (MP)
EGPRS	Enhanced General Packet Radio Service (8-PSK, mobile-systems)
EGREP	Extended Global Regular Expression Print (Unix, GREP)
EGS	Enhanced Graphics System (Commodore)
EHCI	Enhanced Host Controller Interface (USB, Intel)
EHDI	Environmental Human Interface Devices
EHF	Encoding Header Field (Internet, RFC 1154)
EHKP	Einheitliche Hoehere KommunikationsProtokolle (BTX, ER, DTAG)
EHLLAPI	Emulator High Level Language API (IBM, 3270, API)
EHS	European Home Systems [concept]
EHSA	European Home Systems Association (org., Europe)
EHW	Evolvable HardWare
EIA	Electronics Industry Association (USA, org.)
EIB	Element Interconnect Bus (IBM, Cell)
EIB	European Installation Bus
EIBA	European Installation Bus Association (org., Europe)
EICAVR	European Institute for Computer Anti-Virus Research (org., Europe)
EICL	European Informatics Continuous Learning (CEPIS)
EICTA	European Information & Communications Technology Industry Association [old term] (org., Europe)
EIDA	European Integrated Data Archive
EIDE	Enhanced Integrated Drive Electronics (HDD, IDE), "E-IDE"
EIE	enough is enough
EIEIO	Enforce In-order Execution of Input/Output (PowerPC, I/O, CPU)
EIF	Enterprise Instrumentation Framework (MS)
EIFS	Extended InterFrame Space (MAC, PCF, IFS, WLAN)
EIGRP	Enhanced Interior Gateway Routing Protocol (IGRP)
EINE	EINE Is Not EMACS (EMACS, LISP)
EIO	Enhanced Input/Output [architecture] (HP)
EIP	Elastic IP (AWS, IP)
EIP	Extended Instruction Pointer [register] (CPU, Intel, assembler)
EIP	Extended Internet Protocol (Internet, RFC 1385)
EIRP	Effective Isotropic Radiated Power (Bluetooth)
EIS	Electronic Information Systems (manufacturer)
EIS	Enterprise Information System
EIS	European Information System (Europe)
EIS	Executive Information System (IM)
EISA	Enhanced Industry Standard Architecture (ISA)
EISA	European Imaging and Sound Association (org., Europe)
EISB	Electronic Imaging Standards Board (org.)
EISS	Europaeisches Institut fuer SystemSicherheit (org., Karlsruhe, Germany, Europe)
EIST	Enhanced Intel Speedstep Technology (Intel, Pentium)
EIT	Encoded Information Type
EIT	Event Information Table (DVB, EPG)
EITO	European Information Technology Observatory (org.)
EITS	Eesti InfoTehnoloogia Seltsi (org., Estland)
EJB	Enterprise Java Beans (Java, Sun, CORBA)
EJC	Electronic Journal of Communication
EKMS	Electronic Key Management System (cryptography)
EKO	Every Known Optimization [compiler] (PathScale)
EKOS	Elektronisches KOmmunikationsSystem (MBAG)
EL	Electro Luminescent [display]
EL1	Extensible Language one (ECLogic)
ELAN	Educational LANguage
ELAN	Emulated Local Area Network (ATM, LANE)
ELAP	Embedded Linux Applications Platform (Linux, PDA), "e-LAP"
ELAP	Ethernet Link Access Protocol (LAP, ethernet)
ELF	Executable and Linkable Format (Unix, OS/2)
ELH	Entity Life History (DB)
ELI	Embedded LISP Interpreter (Andrew mail system)
ELK	Extension Language Kit (Scheme)
ELLIS	EuLisp LInda System (LISP)
ELM	ELectronic Mailer (Unix)
ELMB	Extreme Low Motion Blur (Asus)
ELO	Elektronischer Leitz Ordner (OA)
ELOD	Erasable Laser Optical Disk (OD)
ELP	Equational Logic Programming [language]
ELRAD	[magazin fuer] ELektronik und technische RechnerAnwenDungen
ELS	Entry Level Solution (Novell, Netware)
EM	Extensions Manager (Apple)
EM64T	Extended Memory [64] Technology (Intel)
EMA	Electronic Messaging Association (org., USA)
EMA	Enterprise Management Architecture (DEC)
EMA	Extended Mercury Autocode
EMACS	Editing MACroS (GNU)
EMACS	Eight Megabytes And Constantly Swapping (slang, EMACS)
EMAS	Edinburgh Multi-Access System (OS, ICL 4-75)
EMB	Enhanced Master Burst (EISA)
EMBI	Excuse My Butting In (slang, Usenet, IRC)
EMC	ElectroMagnetic Compatibility
EMC	[Richard J.] Egan [Roger] Marino Company [unconfirmed] (EMC, manufacturer)
EME	Encrypted Media Extensions (HTML, DRM)
EMEA	[IBM] Europe, Middle East, Africa (IBM)
EMET	Enhanced Mitigation Experience Toolkit (MS)
EMF	Eclipse Modelling Framework (Eclipse)
EMI	ElectroMagnetic Interference
EMI	External Machine Interface [protocol] (SMS)
EMIB	Embedded Multi-die Interconnect Bridge (IC, Intel)
EMISA	EntwicklungsMethoden fuer InformationsSysteme und deren Anwendung (org., GI)
EML	Element Management Layer (TMN)
EMM	Expanded Memory Manager
EMMA	European MultiMedia Award
EMMC	Embedded MultiMedia Card (JEDEC, MMC), "eMMC"
EMP	Excessive Multiple Posting (Usenet, ECP, spam)
EMR	Electro-Magnetic Radiation
EMRL	EMbedded RAID Logic (Adaptec, RAID)
EMS	Energy Management System
EMS	Enhanced Messaging Service (mobile-systems)
EMS	European Mathematical Society (org.)
EMS	Expanded Memory Specification (DOS, Intel)
EMSC	Electronic Mail Standards Committee (org.)
EMSG	email message
EMU	EAP Method Update (EAP)
EMV	ElektroMagnetische Vertraeglichkeit (EN 55022, DIN, VDE 0878)
EMV	Europay, MasterCard and VISA (org., banking)
EMX	Enterprise Messaging eXchange [switch]
EN	Europa Norm (Europe)
ENA	Electronic Networking Association (org., Internet)
ENA	Enterprise Networking Association (Banyan, VINES, user group, org.)
ENA	European Networking Associates (org., Europe)
ENA	Extended Network Addressing (IBM, SNA)
ENCFS	ENCrypted File System (Linux, FS), "EncFS"
ENDC	European Network Design Center (3COM)
ENDIVE	Enhanced Direct Interface Video Extensions (OS/2, MMPM/2, IBM), "EnDIVE"
ENF	Embedded NAS Firmware (RAID, NAS, ArtStor)
ENIAC	Electronic Numerical Integrator And Computer
ENISA	European Network and Information Security Agency (org.)
ENP	Embedded NPrinter (NEST, Novell)
ENS	Enterprise Network Services (Banyan, VINES)
ENSA	Enterprise Network Storage Architecture (HP)
ENSIQ	ENS - Information Query (Banyan, VINES, ENS), "ENS IQ"
ENSMT	ENS - Management Tool (ENS, Banyan, VINES), "ENS-MT"
ENUC	Embedded Next Unit of Computing (Intel, NUC), "eNUC"
ENUM	tElephone NUmber Mapping (VoiP)
EO	Europe Online (network)
EOA	End Of Address
EOB	End Of Block
EOB	end of business [day]
EOCB	Electrical Optical Circuit Board [project] (Bosch, Siemens, IZM, ...)
EOD	End Of Discussion (slang, Usenet, IRC)
EOD	Erasable Optical Disk (OD)
EOD	end of {day,discussion}
EOF	End Of File
EOF	End Of Frame (S-ATA)
EOF	Enterprise Objects Framework (NeXT)
EOI	End Of Input
EOI	End Of Interrupt
EOI	End Or Identify (GPIB)
EOJ	End Of Job
EOL	End Of Line
EOL	end of life
EOLAS	Embedded Objects Linked Across Systems (manufacturer, USA)
EOM	End Of Message
EOM	end of message
EON	Enhanced Other Networks (RDS)
EOP	End Of Procedure (Fax)
EOS	Electrical OverStress
EOS	Extended Operating System (OS)
EOS	end of story
EOSL	End Of Service Life
EOT	End Of Text
EOT	End Of Thread (slang, Usenet, IRC)
EOT	End Of Transmission
EOTD	Enhanced Observed Time Difference (LBS, GPS), "E-OTS"
EOUG	European Oracle User Group (org., DB, Oracle, user group, Europe)
EOWG	[WAI] Education and Outreach Working Group (WAI)
EP	Enterprise Portal (SAP)
EP3	[the] Extensible PERL PreProcessor (PERL)
EPA	Enhanced Performance Architecture
EPA	Environmental Protection Agency (USA, org.)
EPAC	Ein-Platinen-Allzweck-Computer (IC, C'T)
EPAC	Electronic Packaging and Assembly Concept
EPAL	Enterprise Privacy Authorization Language (W3C)
EPBR	Extended Partition Boot Record (PowerQuest)
EPC	Electronic Product Code (RFID)
EPCC	Edinburgh Parallel Computing Center (org., UK, HPC)
EPDF	Embedded Portable Document Format (Adobe, PDF, HTML)
EPEL	Extra Packages for Enterprise Linux (Linux, RHEL, Fedora, RedHat)
EPG	Electronic Program Guide (DVB)
EPH	Electronic Payment Handling (banking)
EPHOS	European Procurement Handbook for Open Systems
EPIA	Embedded Platform Innovative Architecture [motherboard] (VIA)
EPIC	Eclipse PERL Integration Project (Eclipse, PERL)
EPIC	Electronic Privacy Information Center (cryptography)
EPIC	Embedded Platform for Industrial Computing
EPIC	European Public sector Information systems Conference
EPIC	Explicit Parallelism Instruction Computing (Intel, CPU, VLIW)
EPIM	Ethernet Port Interface Module (ethernet)
EPIX	Enhanced Performance unIX (Unix), "EP/IX"
EPK	Ereignisgesteuerte ProzessKette
EPL	Eclipse Public License (Eclipse)
EPL	Elektronenstrahl-ProjektionsLithographie
EPLD	Erasable Programmable Logic Device
EPN	Electronic-highway Platform Netherlands (ISP, Netherlands)
EPOC	EPON Over Coax (DOCSIS, EPON), "EPoC"
EPOC	[not an acronym] (Psion, OS, PDA)
EPON	Ethernet Passive Optical Network (DOCSIS, IEEE 802.3)
EPP	Easy PhotoPrint (Canon)
EPP	Education Purchase Plan (Adobe)
EPP	Enhanced Parallel Port / Protocol (Intel, Zenith, Xircom, IEEE 1284)
EPP	Enhanced Performance Profiles (Nvidia)
EPP	Extensible Provisioning Protocol (RFC 3730/3731/3732/3733/3734/3735)
EPRML	Extended Partial Response - Maximum Likelihood (PRML, HDD, HD-DVD)
EPROM	Erasable Programmable Read Only Memory (ROM, IC, RL, EPROM)
EPS	Electronic Publishing Systems
EPS	Embedded PServer (NEST, Novell)
EPS	Enterprise Protection Strategy (TrendMicro)
EPSA	Early Page Space Allocation (AIX, IBM)
EPSI	Encapsulated PostScript Interchange
EPSIG	Electronic Publishing Special Interest Group (org.)
EPSS	Experimental Packet-Switching System (UK)
EPT	Extended Page Tables (SLAT, Intel)
EQAM	Edge QAM (QAM)
ER	Enterprise Replication (IDS, Informix, DB)
ER	Externer Rechner (T-Online)
ERAT	Effective to Real Address Translation [table] (Power4, IBM, CPU, EA, RA)
ERC	European Radiocommunications Committee (WLAN)
ERCIM	European Research Consortium for Information and Mathematics (org., GMD, INRIA, CWI, RAL, ..., Europe)
ERD	Entity-Relationship Diagram
ERIN	Environmental Resources Information Network (Australia, network)
ERL	Electronic Research Lab (Volkswagen, USA)
ERM	Enterprise Resource Management
ERM	Entity Relationship Model (DB)
ERO	European Radiocommunications Office (org., Europe, CEPT)
EROM	Erasable Read Only Memory (ROM, IC)
ERP	Enterprise Resource Planning [software]
ERS	Enterprise Resource Sharing (ENS, Banyan, VINES)
ERS	Error Report Suppression [flag] (CATNIP)
ES	Embedded Systems
ES	End System (ATM)
ES	Errored Seconds (DS1/E1)
ES	European Standard (ETSI)
ES	Extended Services (OS/2)
ES	Extra Segment [register] (CPU, Intel, assembler)
ES	[Red Hat Enterprise Linux] Enterprise Server (RedHat, Linux, RHEL)
ES1	EliteSwitch/1 (SMC, FDDI), "ES/1"
ESA	Enterprise Systems Architecture (IBM, MVS/XA, VM, CMS)
ESA	Entertainment Software Association (org., USA)
ESANN	European Symposium on Artificial Neural Networks (conference, NN)
ESAXA	Enterprise Systems Architecture / eXtended Architecture (IBM, ESA, XC), "ESA/XA"
ESAXC	Enterprise Systems Architecture / eXtended Configuration (IBM, ESA, XA), "ESA/XC"
ESB	Enterprise Service Bus (Iona, OSS, IBM, SOA)
ESCD	Extended System Configuration Data (BIOS, PNP)
ESCO	Extended Synchronous Connection Orientated (Bluetooth), eSCO
ESCON	Enterprise Systems CONnect(ion) (IBM, I/O)
ESCP2	Epson Specific/Standard Code / Protocol 2 (printing), "ESC/P2"
ESD	ElectroStatic Discharge
ESD	Electronic Software Distribution
ESDC	Extra Segment Descriptor Cache [register] (ES, Intel, CPU)
ESDI	Enhanced Standard Device Interface
ESDS	Entry Sequenced Data Set (VSAM)
ESE	Extensible Storage Engine (AD, MS)
ESEC	European Software Engineering Conference (GI, BCS, AFCET, AICA, OEGI, SI, conference)
ESER	Einheitliches System dEr Rechentechnik (GDR)
ESF	Extended Super Frame (ISDN, T1)
ESI	End System IDentifier (ATM)
ESIM	Embedded Subscriber Identity Module (SIM, mobile-systems), "eSIM"
ESIOP	Environment Specific Inter-ORB Protocol (OMG, CORBA, ORB, DCE)
ESIS	Element Structure Information Set (SGML)
ESIS	End System to Intermediate System [protocol / routing] (OSI), "ES-IS"
ESK	[Fraunhofer] Einrichtung Systeme der Kommunikationstechnik (org.)
ESM	External Storage Module (Sun)
ESMD	Embedded Storage Module Disk
ESMD	Enhanced Storage Module Device
ESMTP	Extended Simple Message Transport Protocol (SMTP, RFC 1425/1869)
ESN	Electronic Serial Number
ESN	Electronic Switched Network
ESNET	Energy Sciences NETwork (network, USA, Internet)
ESORICS	European Symposium On Research In Computer Security (Konferenz)
ESP	EFI System Partition (EFI)
ESP	Easy Software Products (manufacturer, CUPS)
ESP	Electronic Stability Program (car)
ESP	Emulation Sensing Processor (QMS)
ESP	Ethernet Serial Port (ethernet)
ESP	Extreme Support through Personalization (IBM)
ESP	[IP] Encapsulating Security Payload (IPSEC, IP, RFC 1825/1827/2406, VPN)
ESPCM	Electronic Speech systems Pulse Code Modulation (PCM)
ESPRIT	European Strategic Program of Research and Development in Information Technology (Europe)
ESR	Event Service Routine (IPX)
ESR	Extended Support Release
ESRAM	??? Static Random Access Memory (RAM, IC, RL), "eSRAM"
ESRB	Entertainment Software Rating Board (ESA)
ESRT	EFI System Resource Table (EFI)
ESS	Embedded Security System (IBM, TPM)
ESS	Extended Service Set (WLAN)
ESSBASE	Extended Spread Sheet dataBASE (MDBMS, DB)
ESSI	European Software and Systems Initiative
ESSID	Extended Service Set IDentification (SSID, WLAN)
EST	Eastern Standard Time [-0500] (TZ, EDT, USA)
ESTO	Electronic Systems Technology Office (org., ARPA)
ETA	Estimated Time of Arrival (SCP)
ETA	edited to add
ETA	estimated time of arrival
ETAI	Electronic Transactions on Artificial Intelligence (AI)
ETANN	Electrically Trainable Analog Neural Network (NN)
ETAS	Elektronisches Teile-AuskunftsSystem (MBAG)
ETB	Elektronisches TelefonBuch (T-Online)
ETB	End of Transmission Blank / Block
ETC	European Test Conference (VDE, IEEE-CS, conference)
ETE	End-To-End
ETG	Enterprise Transaction Gateway (EDI, NT)
ETH	Eidgenoessische Technische Hochschule
ETHZ	Eidgenoessische Technische Hochschule Zuerich (org., Switzerland)
ETK	Embedded ToolKit [for Windows CE] (MS, Windows, CE)
ETL	Extraction, Transformation and Loading
ETLA	Extended Three Letter Acronym
ETLA	extended three letter acronym
ETLS	Enterprise Transport Layer Security (TLS, ETSI), "eTLS"
ETNO	European Telecommunications Network Operators Association (org., ISP)
ETO	Essentials - Tools - Objects (Apple), "E.T.O."
ETP	Enhanced Tracking Protection (WWW, Firefox)
ETR	Early Token Release (Token Ring)
ETR	Evaluation Technical Report (CC)
ETR	early to rise
ETS	Embedded ToolSuite (Phar Lap)
ETS	Emergency Telecommunication Service (RFC 3689)
ETS	Enhanced Transmission Selection (IEEE 802.1Qaz, DCB)
ETS	European Telecommunication Standard (ETSI)
ETS	Executable Test Suite (ISO 9646-1)
ETSI	European Telecommunication Standards Institute (org., Europe, ETSI)
ETX	End of Transmission teXt
EU	Execution Unit (CPU)
EUC	Extended Unix Code (Unix, AT&T)
EUCTF	European Union Cybercrime Taskforce (org., Europe)
EUD	End User Development
EUDC	EMACS Unified Directory Client (EMACS)
EUFS	Embedded Universal Flash Storage (UFS), "eUFS"
EULA	End User License Agreement (MS, DRM)
EUNET	European Unix NETwork (network, Internet, ISP, Unix)
EURID	European Registry of Internet Domain names (org., Internet, Europe)
EUROISPA	EUROpean Internet Service Provider Association (org., ISP), "EuroISPA"
EUS	EntscheidungsUnterstuetzende Systeme
EUSES	End Users Shaping Effective Software [initiative] (USA)
EUSIDIC	??? [European Association of Information Services] (org., Europe)
EUSUVP	EntscheidungsUnterstuetzendes System UmweltVertraeglichkeitsPruefung (EuropeS, XPS, Uni Hamburg, Germany)
EUTRA	Evolved UMTS Terrestrial Radio Access (UMTS, LTE), "E-UTRA"
EUUG	European Unix User Group (org., user group, Unix, Europe)
EUV	Extreme UltraViolet
EUVL	Extreme UltraViolet Lithography
EV	EtagenVerteiler (cable, EN 50 173)
EVA	[StorageWorks] Enterprise Virtual Array (HP, HDD)
EVBIT	Ergaenzende VertragsBedingugen - InformationsTechnik, "EVB-IT"
EVC	Enhanced Video Connector (VESA)
EVD	Enhanced Versatile Disk (China)
EVDO	Enhanced Voice-Data Optimized / Only (mobile-systems, Qualcomm, ITU), "EV-DO"
EVE	Extended Virtual Environment
EVMS	Enterprise Volume Management System (OSS, IBM)
EVN	EinzelVerbindungsNachweis (DTAG)
EVP	Enhanced Virus Protection (AMD, CPU)
EWAG	experienced wild-ass guess
EWAS	Elektronisches WareneingangsAbwicklungsSystem (MBAG)
EWD	Engine and Warming Display (Airbus, A380), "E/WD"
EWIKO	[verein zur foerderung] Elektronischer WIssenschaftsKOmmunikation (org.)
EWOS	European Workshop for Open Systems (OSI, ODA)
EWS	Employee Written Software (IBM)
EWS	European Workshop on SGML (org., SGML)
EWS	Exchange Web Services (MS)
EXBI	EXaBInary [(2^10)^6] (IEC)
EXCA	EXchangeable Card Architecture, "ExCA"
EXFAT	Extended File Allocation Table (FAT), "exFAT"
EXFCB	EXtended File Control Block
EXIF	Exchangeable Image File Format (DCF, photo, CIPA)
EXSLT	Enhanced eXtensible Stylesheet Language Transformations (XSL, XML, XSLT)
EXTRA	EXecutionTRace Analyser (IBM, OS/2)
EXUG	European X Users Group (org., user group, Europe)
EXWM	EMACS X Window Manager (Emacs)
EXZ	EXcessive Zeros [error event] (DS1/E1, DS3/E3)
EZ	EchtZeit (fair)
EZ	easy
EZPZ	easy-peasy
F2C	FORTRAN to C [converter]
F2F	Frequency - Double Frequency
F2FS	Flash-Friendly File System (Linux, Samsung, FS), "F2fs"
F9	fine
FA	FernmeldeAmt (DTAG)
FAA	Flow Admission Acknowledge [message] (LFAP)
FAAS	Function As A Service, "FaaS"
FABS	Fast Access Btree Structure
FAC	Final Assembly Code (IMEI, GSM, mobile-systems)
FACCH	Fast Associated Control CHannel (GSM, DCCH, mobile-systems)
FACE	Framed Access Command Environment (Unix, SVR4)
FACS	Firmware ACPI Control Structure (ACPI)
FADOS	Fast Amsterdam Distributed (???) Operating System (OS, FAMP)
FADT	Fixed ACPI Description Table (ACPI)
FADU	File Access Data Unit (FTAM)
FAE	Field Application Engineer
FAG	FernmeldeAnlagenGesetz telecommunication, Germany
FAI	Fully Automatic Installation
FAID	Flash Authority Identification Data (EEPROM)
FAIS	Finnish Artificial Intelligence Society (org., Finland, AI)
FAL	File Abstraction Layer (TYPO3)
FAL	File Access Listener (DEC, DNA)
FAME	FORMEX Applied to Multilingualism in Europe (SGML, Europe)
FAMOS	Floating gate Avalanche injection Metal Oxide Semiconductor (IC)
FAMP	Fast Amsterdam MultiProcessor
FANP	Flow Attribute Notification Protocol (Toshiba, RFC 2129)
FAP	Flight Attendant Panel (Airbus, A380, CIDS, LCD)
FAPI	Family Application Programmer Interface (DOS, VDM, API)
FAQ	Frequently Asked Questions (slang, Usenet)
FAQ	frequently asked question
FAR	False Acception Rate
FAR	Fixed Alternative Routing (SNI)
FAR	Flow Admission Request [message] (LFAP)
FARE	Film Automatic Retouching and Enhancement (Canon, Scanner)
FARNET	Federation of American Research NETworks (network)
FAS	Flow Admission Service
FASMI	Fast Analysis of Shared Multidimensional Information (OLAP)
FAST	Fast ARM Solutions Toolkit (ARM, Palm, PDA)
FAST	First Application System Test
FAST	Forschungsinstitut fuer Angewandte Software-Technologie [e.v.] (org.)
FASTA	FAhrzeugbetriebs- und Servicedaten-Transfer und -Analyse (BMW)
FAT	File Allocation Table (DOS, FS)
FATA	Fibre-Attached Technology Adapted (HP, SATA, HDD)
FAU	Flow Admission Update [message] (LFAP)
FAU	Friedrich-Alexander-Universitaet (org., Erlangen, Germany, Nuernberg, Germany)
FAW	Forschungsinstitut fuer Anwendungsorientierte Wissensverarbeitung (org., KI, Ulm)
FAXP	FAX Profile (Bluetooth, SPP), "FaxP"
FB	Fiber optic Backbone
FBAS	FarbBild-AustastSystem / Farb-Bild-Austast-Synchron-signal (video)
FBDIMM	Fully Buffered Dual Inline Memory Module (DIMM, IC, RAM), "FB-DIMM"
FBL	Frame Burst error Length (CD)
FBM	Flexible Buffer Management (QMS)
FBOW	for better or worse
FBPP	Federal Biometeric Protection Profile (NIAP)
FBS	Flexible Bandwidth Service (ATM, SDH)
FC	Federal Criteria [for information technology security] (NIST, USA)
FC	Feedback Control
FC	Fibre Channel (FC)
FC	Force Close (Android)
FC	Frame Control (FDDI, Token Ring)
FCA	Flow Control Ack (DLSW)
FCAL	Fibre Channel - Arbitrated Loop, "FC-AL" 
FCAPS	Fault, Configuration, Accounting, Performance, Security [management areas]
FCB	File Control Block (DOS)
FCBB	Fibre Channel BackBone (FCP), "FC-BB"
FCBS	File Control BlockS (DOS)
FCC	Fast Communication Controller (SCC, MCC)
FCC	Federal Communications Commission (org., USA)
FCC	Forward Carbon Copy (telecommunication)
FCCH	Frequency Correction CHannel (GSM, mobile-systems)
FCCN	Fundacao para a Computacao Cientifica Nacional (org., Portugal)
FCD	Floating Car Data
FCDAE	Fibre Channel Disk Array Enclosure (FC), "FC-DAE"
FCFS	First Come, First Served
FCFS	first come, first served
FCGC	Flight Control and Guidance Computer (Airbus, A380)
FCGS4	Fibre Channel Generic Service 4 (FC, SAN, ANSI), "FC-GS-4"
FCH	Frame Control Channel (HiperLAN/2)
FCI	Fibre Channel Interface
FCI	Flow Control Indicator (DLSW)
FCI	Forward Cache Identifier (CATNIP)
FCIA	Fibre Channel Industry Association (org.)
FCIP	Fibre Channel over Internet Protocol (SAN, FC, IP)
FCL	Framework Class Library (MS, .NET)
FCMI	Fibre Channel Methodology for Interconnects (FC, SAN, ANSI), "FC-MI"
FCO	Flow Control Operator Bits (DLSW, BIT)
FCOE	Fibre Channel Over Ethernet, "FCoE"
FCOL	for crying out loud
FCOS	Flip Chip on Substrate
FCP	[SCSI-3] Fibre Channel Protocol (SAM)
FCPGA	Flip Chip Pin Grid Array (IC, CPU), "FC-PGA"
FCPH	Fibre Channel PHysical and signaling interface (SAM), "FC-PH"
FCR	Flow Change Request [message] (LFAP)
FCS	Fast Circuit Switching
FCS	First Customer Ship (IBM)
FCS	Frame Check Sequence (FDDI, Token Ring)
FCS	Frame Check Sum (MODEM)
FCSAN	Fibre Channel Storage Area Network (FC, SAN)
FCSC	Flight Control Secondary Computer (Airbus, A380)
FDA	FORTRAN Design Aid (FORTRAN)
FDAD	Functional Data ADministrator
FDC	Floppy Disk Controller (FDD)
FDCC	Federal Desktop Core Configuration (NVD, SCAP)
FDCT	Fast Discrete Cosine Transformation (DCT)
FDD	Floppy Disk Drive
FDD	Frequency Division Duplex (mobile-systems)
FDDI	Fiber Distributed Data Interface (ANSI, ISO 8314)
FDDITPPMD	FDDI Twisted Pair-Physical layer, Medium Dependent, "FDDI TP-PMD" 
FDE	Full Duplex Ethernet (ethernet)
FDES	Full Duplex EtherSwitch (Kalpana)
FDI	[fachverband der ] Fuehrungskraefte der Druckindustrie und Informationsverarbeitung (org.)
FDIS	Final Draft International Standard (MPEG)
FDL	File Definition Language
FDL	Free Documentation License (GNU)
FDM	Frequency Division Multiplexing (FDM)
FDM	Fused Deposition Modelling
FDMA	Frequency Division Multiple Access (mobile-systems)
FDMI	Flat Display Mounting Interface (VESA, MIS)
FDO	Functional Device Object
FDSN	Federation of Digital Seismograph Networks (org.)
FDT	Formal Description Technique
FDTDMA	Frequency Division/Time Division Multiple Access (mobile-systems, GSM), "FD/TDMA"
FDX	Full DupleX
FE	Focus Error (DVD)
FE	Forschung und Entwicklung, "F&E"
FE	Functional Entity (IN)
FEA	Functional Entity Action (IN, UNI)
FEAL	Fast Data Encipherment Algorithm (DES, cryptography)
FEAST	Fast Data Enciphering Algorithm (cryptography)
FEBE	Far End Block Error (SONET)
FEC	Forward Error Correction (GSM, mobile-systems)
FECN	Forward Explicit Congestion Notification (ATM)
FEDRAMP	FEDeral Risk and Authorization Management Program (USA), "FedRAMP"
FEFCO	???
FEIT	Fujitsu Enhanced Imaging Technology (Fujitsu)
FEK	File Encryption Key (cryptography)
FEM	Fabric Expander Module (Dell, FSE)
FEM	Finite Elemente Methode
FEN	Free-net Erlangen/Nuernberg
FEP	Firewall Enhancement Protocol (RFC 3093)
FEP	Flight Envelope Protection (Airbus, A380)
FEP	Front End Processor
FER	Forward Error Correction (satellite)
FERF	Far End Receive Failure (UNI, ATM, SONET, OAM)
FESI	Federacion Espanola de Sociedades de Informatica (org., Spain)
FET	Field Effect Transistor
FF	Form(ular) Feed
FFAPI	File Format API (MS, API)
FFC	Fully Formed Character [printer]
FFDC	First Failure Data Capture
FFDT	FDDI Full Duplexing Technology (FDDI)
FFF	Fused Filament Fabrication
FFFS	Failsafe Flash File System (FS, Flash), "F3S"
FFII	Foerderverein fuer Freie Informationelle Infrastruktur (org.)
FFOL	FDDI Follow-On-LAN
FFS	Fallback Fault-tolerant Server (IBM, OS/2)
FFS	Fast File System (Unix, Amiga, Commodore)
FFS	Fast Filing System (BSD, Unix)
FFS	Flexible Fertigungs-Systeme
FFS	free for shipping
FFST2	First Failure Support Technology /2 (IBM), "FFST/2"
FFT	Final Form Text
FGA	Future Graphics Adapter (Spea)
FGCS	Fifth Generation Computer Systems [project] (ICOT)
FGPP	Fine Grained Password Policy (AD)
FGREP	Fixed Global Regular Expression Print (Unix, GREP)
FHE	Fully Homomorphic Encryption (cryptography)
FHGS	FreeHand Graphics Studio (Macromedia, DTP)
FHIR	Fast Healthcare Interoperability Resources (USA)
FHS	File system Hierarchy Standard (Linux, LSB)
FHSS	Frequency Hopping Spread Spectrum (WLAN)
FIA	Fiberoptic Industry Association (org.)
FIB	Forwarding Information Base (router, LAN, Internet)
FIBU	FInanzBUchhaltung
FIC	First International Computer [inc.] (manufacturer)
FICS	Free Internet Chess Server
FID	File IDentifier (APDU)
FID	File Identifier Descriptor (UDF, CD-R)
FIDO	FIlter Device Object, "FiDO"
FIDO	Fast IDentity Online (org.)
FIF	Fractal Interchange Format
FIFF	Forum Informatikerinnen Fuer den Frieden (org.)
FIFO	First In First Out (CPU)
FIG	Forth Interest Group (org., Forth)
FIGLET	Frank, Ian and Glenn's LETters (ASCII, fonts)
FILE	Free Internet Lexicon and Encyclopedia (WWW, DICT)
FILO	First In Last Out
FIMAS	Financial Institution Message Authentication Standard (banking, ANSI)
FINTS	FINancial Transaction Services (banking, HBCI), "FinTS"
FIOC	Frame Input/Output Controller
FIP	Facility Interface Processor
FIP	Factory Instrumentation Protocol
FIP	Fluorescent Indicator Panel
FIPA	Foundation for Intelligent Physical Agents (org., Agents)
FIPS	Federal Information Processing Standard (NIST, USA)
FIQ	Fast Interrupt reQuest (ARM, RISC)
FIR	Fast IRDA (IRDA)
FIR	Finite Impulse Response (DSP)
FIRE	Flexible Intelligent Routing Engine (3Com)
FIRE	Future Internet Research and Experimentation (Europe, CORDIS)
FIRMR	Federal Information Resources Management Regulations (USA)
FIRP	Federal Internet Requirements Panel (Internet, USA)
FIRS	Federated Internet Registry Service (LDAP, Internet)
FIRST	ForschungsInstitut fuer Rechnerarchitektur und SoftwareTechnik (org., GMD, Berlin, Germany)
FIRST	Forum of Incident Response and SecuriTy (org., NIST)
FIS	FachInformationsSystem
FIS	FuehrungsInformationsSysteme
FISH	FIle transfer with a SHell, "FiSH"
FISMA	Federal Information Security Management Act (USA)
FIT	Failures In Time
FIT	Fraunhofer institut fuer angewandte InformationsTechnik (org.)
FITB	fill in the blank
FITS	Functional Interpolating Transformation System
FITUG	Foerderverein Informationstechnik und Gesellschaft [e.V.] (org.)
FIU	Fingerprint Identification Unit (Sony)
FIZ	FachInformationsZentrum karlsruhe Org., Germany
FK	Foundation Kit (NextStep, OpenStep, Apple, Rhapsody)
FKS	Fernmelde-Klein-Steckverbindung (Westernstecker)
FL	Fiber optic Link
FLAC	Free Lossless Audio CODEC (CODEC, audio)
FLACC	Full Level Algol Checkout Compiler
FLAME	FLexible API for Module-based Environments (RL, API)
FLASK	FLux Advanced Security Kernel (DTOS)
FLC	Ferroelectric Liquid Crystal
FLEA	Four Letter Extended Acronym
FLEXIP	FLEXible Internet Protocol (Novell, Netware), "FLeX/IP"
FLIM	Faithful Library about Internet Message (EMACS, GNU)
FLOPS	FLoating-point Operations Per Second (CPU)
FLOSS	Free, Libre, and Open Source Software
FLOWR	For, Let, Order by, Where, Return [principle] (DB, XML)
FLP	Fast Link Pulse (ethernet, LAN, NLP)
FLS	???
FM	Frequenz-Modulation
FMA	Federated Management Architecture (Java)
FMA	Fused Multiply Add [operation]
FMB	Flexible MotherBoard [design]
FMM	Flash Memory Manager (Intel)
FMO	Flexible Macroblock Ordering (AVC, video)
FMS	FORTRAN Monitor System (OS, IBM 709)
FMS	FernMeldeSystem
FMSB	Flip Mount Super Back-plate (Scythe), F.M.S.B.
FMTEYEWTK	Far More Than Everything You Ever Wanted To Know (slang, PERL)
FMV	Full Motion Video [game]
FNC	Federal Networking Council (org., USA)
FNI	FachNormenausschuss Informationsverarbeitung [1962-1987] (DIN, NI, predecessor)
FNO	for nerds only
FNO	from now on
FO	Fiber Optic
FOA	Fiber Optic Association (org.)
FOAF	Friend Of A Friend [vocabulary] (RDF)
FOC	Fiber Optic Cable / Communications
FOC	free of charge
FOCAL	FOrmula CALculator
FOCS	[symposium on] Foundations Of Computer Science (Konferenz)
FOD	Flexible Optical Disk (OD)
FODA	Formal specification of ODA document structures (ODA, ISO)
FODO	[international conference on] Foundations Of Data Organization and algorithms (conference, INRIA)
FOEBUD	[verein zur] Foerderung des OEffentlichen Bewegten und Unbewegten Datenverkehrs [e.v.] (org.), "FoeBuD"
FOIP	Face Over Internet Protocol (IP), "FoIP"
FOIRL	Fiber Optic InterRepeater Link (OWG)
FOKUS	Forschungszentrum fuer Offene KommUnikationsSysteme (org., GMD, Berlin, Germany)
FOLDOC	Free OnLine Dictionary Of Computing (WWW, UK)
FOLED	Flexible Organic Light Emitting Display (OLED)
FOMA	Freedom Of Multimedia Access (Japan, mobile-systems)
FOMAU	Fiber Optic MAU (ethernet, MAU)
FON	Fiber Optics Network
FOO	Friends Of O'reilly [meeting]
FOOBAR	FTP Operation Over Big Address Records (RFC 1639, FTP)
FOOT	Forum for Object Oriented Technology (CERN, OOP)
FOP	Feature Orientated Programming
FOP	Formatting Object Processor (Apache, XSL-FO)
FORMEX	FORMalised EXchange of electronic publications (SGML, Europe)
FORML	Formal Object Role Modelling Language
FORTRAN	FORmula TRANslation
FORTWIHR	FORschungsverbund fuer Technisch-WIssenschaftliches HochleistungsRechnen (org., Bavaria)
FORWISS	bayerisches FORschungszentrum fuer WISsensbasierte Systeme (org., KI)
FOSI	Format Output Specification Instance (SGML, CALS)
FOSS	Free and Open Source Software
FOSSFA	Free Software and Open Source Foundation for Africa (org., Africa)
FOSSIL	Fido Opus Seadog Standard Interface Layer
FOT	Fiber Optic Transceiver
FOTA	Firmware Over The Air
FOTE	Follow-on Operational Test and Evaluation, "FOT & E"
FOUC	Flash Of Unstyled Content (CSS)
FOURCC	FOUR Character Code (RIFF, TIFF, VFW, DivX)
FOV	Field Of View (VRML)
FOX	Field Operational X.500
FPA	Fast Packet Adaption (FPS, FPR)
FPA	Floating Point Accelerator
FPAA	Field Programmable ALU Array (IC, ALU, RL)
FPBGA	Fine Pitch Ball Grid Array (IC, CPU)
FPC	Floating Point Coprocessor
FPD	Flat Panel Display
FPDI	Flat Panel Display Interface (VESA)
FPDU	FTAM Protocol Data Unit (PDU)
FPE	Floating Point Engine
FPFA	Field Programmable Function Array
FPGA	Field Programmable Gate Array (RL)
FPI	Flux changes Per Inch (HDD)
FPI	Formal Public Identifier (DTD, SGML, SI)
FPI	Functional Process Improvement
FPK	Fast Packet Keying (WLAN, WEP, RSA, cryptography)
FPLA	Field Programmable Logic Array
FPLMTS	Future Public Land Mobile Telecommunications System (IN, mobile-systems)
FPM	Fast Page Mode [DRAM] (RAM, DRAM)
FPM	Fast Page Mode [ram] (RAM, DRAM, IC)
FPMDRAM	Fast Page Mode DRAM (RAM, DRAM, IC), "FPM-DRAM"
FPMPMI	Flat Panel Monitor Physical Mounting Interface [standard] [old term] (LCD, VESA, FDMI)
FPNW	File and Print service for NetWare (MS, Windows NT, DSMN)
FPODA	Fixed Priority Orientated Demand Assignment (MAC, PODA)
FPP	FORTRAN Pre-Processor (FORTRAN)
FPP	Fast-Parallel-Port
FPP	Floating Point Processor
FPP	Full Packaged Product (MS)
FPR	Fast Packet Relay (FPS, FPA)
FPR	Film Patterned Retarder (LCD)
FPR	Floating Point Register (FPU)
FPS	Fast Packet Switching (X.25, Datex-J)
FPS	First Person Shooter [game]
FPS	Frames Per Second
FPS	first person shooter
FPS	frames per second
FPSE	Free PlayStation Emulator, "FPSe"
FPSE	FrontPage Server Extensions (Microsoft, IIS)
FPU	Floating Point Unit (CPU)
FQDN	Fully Qualified Domain Name (Internet)
FRAD	Frame Relay Access Device
FRAM	Ferroelectric Random Access Memory (RAM, IC)
FRC	Frame Rate Control (PDP)
FRD	Functional Requirements Description
FRF	Floatingpoint Register File (DEC, Alpha, CPU)
FRICC	Federal Research Internet Coordinating Committee (org.)
FRL	Frame Representation Language (AI)
FRMR	FRaMe Reject (HDLC, LAPB, SDLC)
FROM	Factory Read Only Memory (ROM)
FRR	False Rejection Rate
FRR	Functional Recovery Routine
FRS	Flexible Route Selection
FRS	Frame Relay Service (ATM, UNI)
FS	File System (LVM)
FS	Forward Secrecy (cryptography, PFS)
FS	Frame Status (FDDI, Token Ring)
FSAG	Free Software Association of Germany (org.)
FSB	For Small Business (Novell)
FSB	Front Side Bus
FSC	Fujitsu Siemens Computer (manufacturer)
FSCK	File System Consistency checK (Unix)
FSD	File System Driver
FSDO	for some definition of
FSE	Fabric Switch Engine (Dell, FEM)
FSF	Free Software Foundation (org., GNU)
FSFE	Free Software Foundation Europe (org., FSF)
FSG	Free Standards Group (org.)
FSH	File System Hierarchy (Linux, LSB)
FSIP	Full Scale InPut (FSOP)
FSK	Frequency Shift Keying (telecommunication)
FSM	Finite State Machine (TTCN, ...)
FSM	Freiwillige Selbstkontrolle Multimedia Org., Germany
FSMGDOS	Font Scaling Manager - Graphics Device Operating System (OS, Atari), "FSM-GDOS"
FSMO	Flexible Single Master Operations (AD)
FSO	[scripting runtime library] File System Objects (MS, WSH)
FSOP	Full Scale OutPut (FSIP)
FSOS	Free Standing Operating System (OS)
FSP	File Slurping Protocol
FSP	Firmware Support Package (Intel)
FSPF	Fibre channel Shortest Path First
FSRM	File Server Resource Manager (AD)
FSRTL	File System RunTime Library
FSS	Fair Share Scheduler (Solaris, Sun)
FSS	Fast System Switch (Unix)
FSSUTF	FileSystem Safe UCS Transformation Format (UCS, Unicode), "FSS-UTF"
FST	Flat Square Technology (Hitachi)
FSTN	Film SuperTwisted Nematic (LCD)
FSTP	Foiled Shielded Twisted Pair [cable] (STP, TP), "F/STP"
FSU	Free Software Union (org.)
FSV	Flexible Sender Validation (SPAM)
FSVO	For Some Value Of (slang, Usenet, IRC)
FSVO	for some value of
FT1	Fractional T1 (ISDN, T1, DS-0, DS-1)
FTA	Floptical Technology Association (3M u.a.)
FTAM	File Transfer, Access and Management (GOSIP, ISO 8571/8572)
FTBFS	Fails To Build From Source (Linux, Debian, slang)
FTBFS	fails to build from source
FTC	Federal Trade Commission (org., USA)
FTE	[DCOM] For The Enterprise (DCOM, SAG)
FTF	Flash Tool Firmwares (Android)
FTFY	fixed that for you
FTHOI	for the {heck,hell} of it
FTL	Flash Translation Layer
FTL	faster than light
FTL	for the loss
FTM	File Transfer Manager (PDA, Casio)
FTN	Fido Technology Network (FidoNet)
FTNA	File Transfer Access and Management
FTNEA	File Transfer NEtwork Architecure (SNI)
FTOS	File Transfer OSI Support
FTOS	File Transfer Open Systems
FTP	File Transfer Protocol (Internet, RFC 959)
FTP	Foiled Twisted Pair [cable] (UTP, TP)
FTPD	File Transfer Protocol DAEMON (FTP)
FTR	Full Text Retrieval
FTR	for the record
FTS	Fidonet Technical Standard
FTS2000	Federal Telecommunications Services - 2000 (USA), "FTS-2000"
FTSC	Federal Telecommunications Standards Committee (org., USA)
FTSC	Fidonet Technical Standard Conference (Konferenz)
FTTC	Fiber To The Curb
FTTH	Fibre To The Home (FTTN)
FTTLA	Fiber To The Last Amplifier
FTTN	Fibre To The Node (FTTH)
FTTT	from time to time
FTW	for the win
FTZ	FernmeldeTechnische Zentralamt / Zulassung (DTAG, ZZF, predecessor)
FTZ	Flush To Zero (DAZ)
FUA	Flow Update Acknowledge [message] (LFAP)
FUB	Freie Universitaet Berlin (org.)
FUBAB	Fouled / Fucked Up Beyond All Belief (slang, Usenet, IRC)
FUBAR	Failed UniBus Address Register (VAX)
FUBAR	Fouled / Fucked Up Beyond All Recognition / Repair (slang, Usenet, IRC)
FUD	Fear, Uncertainty & Doubt (slang, IBM)
FUD	fear, uncertainty, [and] doubt
FUEV	Fernmeldeanlagen-UEberwachungsVerordnung
FUHD	Full Ultra HD [7680x4320] (HD)
FUN	Flow Update Notification [message] (LFAP)
FUNI	Frame User Network Interface
FUSE	Filesystem in USErspace (Linux)
FUSSP	Final Ultimate Solution to the SPAM Problem (SPAM)
FVD	Forward Versatile Disc (China, WMV)
FVWM	F Virtual Window Manager
FWA	Fixed Wireless Access
FWH	FirmWare Hub (BIOS, Intel)
FWIW	For What It's Worth (slang, Usenet, IRC)
FWIW	for what it's worth
FWS	Folding White Space (RFC 1822)
FWT	Fast Wavelet Transformation
FXO	Foreign eXchange Office (FXS)
FXS	Foreign Exchange System / Subscriber (FXO)
FXU	FiXed point Unit (POWER, CPU)
FYEO	for your eyes only
FYI	For Your Information (slang, Usenet, IRC)
FYI	for your information
FZA	??? [compression]
FZI	ForschungsZentrum Informatik (org., Uni Karlsruhe, Germany)
G	grin
G/C	garbage collect
G2G	got to go
G2K	good to know
GA	General Availability (OS/2)
GA	Genetic Algorithm(s)
GA	go ahead
GAA	General Application Area (CD-MRW)
GABELN	Gruppe Area Brett Echo Liste Newsgroup (slang, Usenet, BBS)
GABRIEL	GAteway and BRIdge to Europe's national Libraries
GAC	Global Assembly Cache (MS, .NET)
GAC	Government Advisory Council (ICANN)
GAC	get a clue
GADK	Global Application Developers Kit (Sun)
GAE	Generic Application Environment
GAEB	Gemeinsamer Ausschuss fuer Elektronik im Bauwesen (org.)
GAFCON	German AirForce Communication Network Mil., Germany, Netzwerk
GAFDIN	German AirForce Digital Network Mil., Germany, Netzwerk
GAIA	GUI Application Interoperability Architecture (OSF)
GAIN	Gator Advertising and Information Network
GAIN	German Advanced Integrated Network (IBM)
GAK	Governmental Accessed Keys (cryptography)
GAL	Generic Array celL / Logic
GAL	Global Address List (MS, Windows, Exchange)
GAL	get a life
GAN	Generative Adversarial Network
GAN	Global Area Network
GAN	GrenzAktenNachweis (INPOL)
GAP	Generic Access Profile (DECT, Europe, Bluetooth)
GAP	Generic Address Parameter
GARP	Gratious Address Resolution Protocol (ARP), "gARP"
GART	Graphics Address Remapping Table (AGP)
GASH	Group Admin SHell (Unix, Shell)
GATOR	GATeway OrientierungsRatgeber (Internet)
GAWK	GNU AWK (GNU, AWK)
GB	GigaByte
GB	GingerBread (Android, OS)
GB	GuoBao [codepage]
GBA	GameBoy Advance (Nintendo)
GBASP	GameBoy Advance Special Project (Nintendo), "GBA SP"
GBE	GigaBit-Ethernet (LAN), "GbE"
GBIC	GigaBIT Interface Converter
GBIT	Giga BIT (BIT), "GBit"
GBM	Generalised Bitmap Module (DLL, Windows, Linux, OS/2)
GBPS	GigaBits Per Second (BIT)
GBTW	get back to work
GC	Global Catalog (MS, AD)
GC	Graphic Context (X-Windows)
GCA	General Communications Architecture (Ingres)
GCAD	Geographical Computer Aided Design System
GCATT	Georgia Center for Advanced Telecommunications Technology (org., USA)
GCC	GNU C Compiler / GNU Compiler Collection (GNU)
GCCS	Global Command and Control System (DISA, mil.)
GCCS	Government Code and Cipher School (UK, mil.), "GC&CS"
GCF	Generic Connection Framework (Java, J2ME)
GCFW	GIAC Certified FireWall analyst (GIAC, GSE)
GCHQ	Government Communications HeadQuarters (mil., UK)
GCIA	GIAC Certified Intrusion Analyst (GIAC, GSE)
GCID	Global Call IDentifier
GCIDIE	Global Call IDentifier- Information Element (GCID), "GCID-IE"
GCIH	GIAC Certified Incident Handler (GIAC, GSE)
GCJ	GNU Compiler for Java (GNU, Java)
GCL	GNU Common LISP (GNU, LISP)
GCL	Graphics Command Language
GCM	Galois/Counter Mode (GCM)
GCMP	Galois/Counter Mode Protocol (GCM)
GCN	Graphics Core Next (AMD)
GCOS	General Comprehensive Operating System (Honeywell, OS, Honeywell Series 60, Honeywell Series 6000)
GCR	Gray Component Replacement (RGB, CYMK, DTP)
GCR	Group Coded Recording
GCRA	Generic Cell Rate Algorithm (UNI, ATM)
GCS	Greek Computer Society (org., Griechenland)
GCS	Group Control System (IBM, VM, VME, VM/ESA)
GCT	Group Completion Table (Power4, IBM, CPU)
GCUX	GIAC Certified UniX security administrator (GIAC, GSE)
GCWN	GIAC Certified WiNdows security administrator (GIAC, GSE)
GCWS	[ServerWorks] Grand Champion WorksStation [chipset], "GC-WS"
GDA	Global Directory Agent (DCE)
GDAP	Government Document Application Profile
GDB	GNU DeBugger (GNU)
GDBM	GNU Data Base Manager (DB, GNU)
GDC	GCC D Compiler (GCC)
GDC	Game Developers Conference
GDD	Gesellschaft fuer Datenschutz und Datensicherung (org.)
GDDM	Graphical Data Display Manager (IBM)
GDDR2	Graphics Double Data Rate 2 (SDRAM, IC, Samsung)
GDF	Gnutella Developer Forum (GNU, Internet)
GDH	Grid Data Handle (grid)
GDI	Graphical Device / Display Interface
GDL	Geometric Description Language
GDM	Grid Data Management (Grid)
GDMI	Generic Definition of Management Information
GDMO	Guidelines for the Definition of Managed Objects (OSI)
GDOP	Geometrical Dilution Of Precision (GPS)
GDOS	Graphics Device Operating System (OS, Atari)
GDOUG	Greater Detroit OS/2 User Group (org., user group, OS/2, USA)
GDPDU	Grundsaetze zum Datenzugriff und zur Pruefbarkeit Digitaler Unterlagen (BMF), "GDPdU"
GDPR	General Data Protection Regulation
GDPS	Geographically Dispersed Parallel Sysplex
GDQS	Grid Distributed Query Service (DQP, OGSA-DAI, grid)
GDR	General Distribution Release
GDR	Grid Data Reference (grid)
GDROM	GigaDisk Read Only Memory (Sega, ROM), "GD-ROM"
GDS	Generalized Data Stream (IBM, APPC)
GDS	Global Directory Service (DCE)
GDS	Grid Data Service (grid)
GDSF	Grid Data Service Factory (GDS, grid)
GDT	Global Descriptor Table
GDT	Grid Data Transport (grid)
GDTD	Grid Data Transport Depot (GDT, grid)
GDTRC	Global Descriptor Table Register Cache (GDT, Intel, CPU)
GDTS	Grid Data Translation / Transformation Service (grid)
GE	General Electric (manufacturer, GE)
GE	GigaBIT Ethernet (ethernet, BIT)
GEAM	GEAM Encrypts All Mails (cryptography)
GECOS	General Electric Comprehensive Operating Supervisor / System (OS, GE, GCOS, predecessor, Honeywell)
GED	Google Experience Device (Android, OS)
GEDCOM	GEnealogical Data COMmunication [format], "GeDCom"
GEF	Graphical Editing Framework (Java, SWT, WTP)
GEGL	GEneric Graphic Library (GIMP)
GEI	Gesellschaft fuer Elektronische Informationsverarbeitung [mbh] (manufacturer, Aachen)
GEIST	German Encyclopedic Internet Service Terminal (org.)
GEM	Generalized Executive for realtime Multiprocessor applications (OS)
GEM	Graphics Environment Manager (DR, PC)
GEMM	GEneral Matrix Multiply (BLAS)
GENA	General Event Notification Architecture (UPnP)
GENI	Global Environment for Network Innovations (NSF)
GENIE	General Electric Network for Information Exchange (network, GE)
GEOS	Graphic Environment Operating System (OS)
GEPON	Gigabit Ethernet Passive Optical Network (EPON, IEEE 802.3ah)
GERAN	GSM EDGE Radio Access Network (GSM, EDGE, mobile-systems)
GESIP	GESellschaft fuer Informatik in der Pharmazie [e.v.] (org.)
GETS	Government Emergency Telecommunications System (USA)
GEVN	GEOFON Virtual Network (GEOFON)
GF	girlfriend
GFC	Generic Flow Control (ATM)
GFC	Going For Coffee (slang, Usenet, IRC)
GFDL	GNU Free Documentation License (GNU)
GFLOPS	Giga FLoating-point Operations Per Second (CPU)
GFP	Global Functional Plane (IN)
GFS	Global File System (GFS, Unix)
GFSK	Gaussian Frequency Shift Keying (telecommunication)
GFU	good for you
GFY	good for you
GG	good game
GGA	good game all
GGF	Global Grid Forum (org., grid, EMC, FSC, HP, Intel, Oracle, ...)
GGI	General Graphics Interface
GGP	Gateway to Gateway Protocol (RFC 823)
GGP	good game partner
GGS	GueteGemeinschaft Software [e.v.] (org.)
GGSN	Gateway GPRS Support Node (GPRS, mobile-systems)
GGWP	good game, well played
GHOST	Goal Hierarchy and Objectives Structuring Technique (TUB)
GHTSTN	Guest Host Technique SuperTwisted Nematic (LCD), "GHT-STN" 
GI	Gesellschaft fuer Informatik (org.)
GIAC	Global Information Assurance Certification (org.)
GIBI	GIgaBInary [(2^10)^3] (IEC)
GIC	Generic Interrupt Controller
GID	Group ID
GIDAS	Grafisch-Interaktives DatenAnalyseSystem
GIDEI	General Input Device Emulation Interface
GIDF	Google Ist Dein Freund (telecommunication, Usenet, IRC)
GIDO	General Intrusion Detection Object (CIDF)
GIFT	GNU Image Finding Tool (GNU)
GIGO	Garbage In Garbage Out
GIGO	garbage in, garbage out
GII	General Input Interface
GIL	Gesellschaft fuer Informatik in der Land-, forst- und ernaehrungswirtschaft [e.v.] (org.)
GIM	Gesellschaft fuer informationstechnik und InformationsManagement [mbh] (ISC, Bremen)
GIMP	General / GNU Image Manipulation Program (Linux, graphics, GNU)
GIMPS	Great Internet Mersenne Prime Search (Internet)
GINA	Generische INteraktive Anwendung (GMD)
GINA	Graphic Identification and Authentication
GIOP	General Inter-ORB Protocol (OMG, CORBA, ORB, IIOP)
GIPS	Giga Instructions Per Second (CPU)
GIRL	Generalized Information Retrieval Language
GIS	Geographic Information System
GISF	GIAC Information Security Fundamentals (GIAC)
GIT	GNU Interactive Tools [old term] (GNU)
GITS	Government Information Technology Service (USA)
GIUA	German Ingres User Association (org., user group, DBMS, DB)
GIYF	Google is your friend
GJ	good job
GJSP	GNU Java Server Pages (GNU, Java, JSP)
GKDC	Group Key Distribution Centre (KDC, CBT)
GKHI	Generalized Kernel Hook Infrastructure (Linux, IBM)
GKMP	Group Key Management Protocol
GKS	Graphic Kernel System
GL	good luck
GLDV	Gesellschaft fuer Linguistische DatenVerarbeitung (org.)
GLF	Group Looking For (MMORPG, slang, LFG)
GLGPL	GNU Lesser General Public License (GNU)
GLHF	good luck, have fun
GLI	Graphics Link Interface
GLINE	global kill line
GLM	Generalized Markup Language
GLOCOM	[center for] GLObal COMmunications (org., Japan)
GLONASS	Globalnaja Nawigazionnaja Sputnikowaja Sistema
GLSL	openGL Shading Language (OpenGL)
GLT	openGL c++ Toolkit (OpenGL)
GLTSD	Global Logging Target Save Disabled (HDD, SCSI)
GLU	openGL Utility Library (OpenGL, GLU)
GLUT	openGL Utility library Toolkit (OpenGL, GLU)
GLWT	good luck with that
GLX	openGL extension for the X window system (OpenGL, X-WIndows)
GM	General MIDI [standard] (MIDI)
GM	game master
GMA	Gesellschaft fuer Mess- und Automatisierungstechnik (org., VDI)
GMAC	Galois Message Authentication Code (GCM)
GMC	Global Motion Compensation (DivX, video)
GMCH	Graphics and Memory Controller Hub (Intel, ICH)
GMD	Gesellschaft fuer Mathematik und Datenverarbeitung (org., St. Augustin)
GMDS	deutsche Gesellschaft fuer Medizinische Dokumentation, informatik und Statistik [e.v.] (org.)
GME	Gesellschaft MikroElektronik (org., VDE, VDI)
GMGPL	GNAT Modified GNU Public License (GNAT, GNU, GPL)
GMI	Generic Management Information (OSI)
GMK	Group Master Key (RSN, cryptography)
GML	GameMaker Language
GML	General Markup Language
GML	Geography Markup Language (XML, OGC)
GML	Graph Modeling Language
GMOEOR	Gesellschaft ??? (org.)
GMP	GNU Multi-Precision [library] (GNU)
GMPLS	Generalized MultiProtocol Label Switching
GMR	Giant Magneto-Resistive [heads] (HDD, IBM, Toshiba)
GMSC	Gateway Mobile services Switching Center (mobile-systems)
GMSK	Gaussian Minimum Shift Keying
GMT	Greenwich Mean Time [+0000] (TZ, UTC, UK)
GMT	Greenwich mean time
GMTA	great minds think alike
GNA	Global Network Academy (Internet)
GNAT	GNU Ada Translator (GNU)
GNBD	Global Network Block Device (GFS)
GNFS	General Number Field Sieve (cryptography)
GNI	GayNet International (network)
GNIUS	GSM Network for Improved access to Universal Services (GSM, Europe)
GNMP	Government Network Management Profile (USA)
GNN	Global Network Navigator (Internet, WWW)
GNOME	GNU Network Object Model Environment (GNU, GNOME, GUI)
GNU	GNU's Not Unix (recursive!, Unix, GNU, OS)
GNUIT	GNU Interactive Tools (GNU)
GNUPG	GNU Privacy Guard (GNU, cryptography), "GnuPG"
GNV	GNU is Not VMS (HP, VMS, GNU)
GNX400	Gateway Network eXchange 400 (Proteon, SNA, SDLC), "GNX 400"
GOBS	Grundsaetze Ordnungsmaessiger DVgestuetzter BuchfuehrungsSysteme (DV), "GoBS"
GOCA	Graphic Object Content Architecture (IBM, MO:DCA)
GOD	Global OutDial
GOD	Grundsaetze ordnungsmaessiger Datenverarbeitung, "GoD" 
GOEP	Generic Object Exchange Profile (Bluetooth, SPP)
GOK	GNOME On-screen Keyboard (GNOME)
GOK	God only knows
GOMS	Goals, Operators, Methods, Selection [theory]
GOP	Grand Old Party
GOP	Group Of Pictures (video, VOBU, DVD)
GOPS	Giga Operations Per Second
GOSIP	Government Open Systems Interconnections Profile (USA, UK)
GOT	Global Offset Table
GOWI	get on with it
GP	Generative Programming
GPA	GNU Privacy Assistant (GNU, GnuPG)
GPC	GNU Pascal Compiler (GNU)
GPC	General-Purpose Computation
GPC	Graphics Performance Characterization [committee] (org., HP, IBM, DEC, SGI, Sun,...)
GPC	Graphics Performance Council (SPEC)
GPC	Group Policy Container (AD, GPO)
GPCI	Graphics Processor Command Interface
GPF	General Protection Fault (Windows)
GPFS	General Parallel File System (IBM)
GPG	GNU Privacy Guard (GNU)
GPGPU	General Purpose computation on Graphics Processing Units (GPU)
GPI	Graphics Programming Interface
GPIB	General Purpose Interface Bus (IEEE 488)
GPIB	General-Purpose Interface Bus (IEEE 488, GPIB)
GPIO	General Purpose Input Output
GPL	General Public Licence (GNU)
GPL	Graphics Programming Language
GPM	Gesellschaft fuer ProjektManagement [e.v.] (org.)
GPMC	Group Policy Management Console (MS, Windows, XP, .NET)
GPO	Group Policy Objects (AD, GPO)
GPON	Gigabit Passive Optical Network (EPON)
GPOS	General Purpose Operation System
GPP	GNU [C] Plus Plus [compiler] (GNU)
GPP	Geforce Partner Program (Nvidia)
GPP	[SCSI-3] Generic Packetized Protocol (SAM)
GPR	General Purpose Register (CPU)
GPRS	General Packet Radio Service / System (ETSI, GSM, TCP/IP, GPRS, mobile-systems)
GPS	Global Positioning System (GPS)
GPS	global positioning system
GPSI	Graphics Processor Software Interface
GPSID	GPS Intermediate Driver (Windows, Mobile)
GPT	GUID Partition Table (EFI, GUID)
GPT	Group Policy Template (AD, GPO)
GPU	Graphics Processing Unit
GPV	General Public Virus
GQES	Grid Query Evaluation Service (DQP, OGSA-DAI, grid)
GR8	great
GRADD	GRaphics Adapter Device Driver (OS/2, IBM)
GRAPHML	GRAPH Markup Language
GRAPHXML	GRAPH eXtensible Markup Language (XML)
GRASP	Graphic Animation System for Professionals
GRAW	Ghost Recon Advanced Warfighter
GRC	Generic Reference Configuration
GRDDL	Gleaning Resource Descriptions from Dialects of Languages (W3C, XML, RDF)
GRE	Generic Routing Encapsulation (RFC 1701, VPN)
GREP	Global Regular Expression Print (Unix)
GRH	Global Route Header (Infiniband)
GRIB	GRIdded Binary [format]
GRIC	Global Research Internet Connection (org., ISP)
GRINS	GRaphical iNterface to SMIL (SMIL, Oratix), "GRiNS"
GRPS	General Packet Radio Service (GSM, mobile-systems)
GRS		Global Resource Serialization (IBM)
GRS	Generalized Reed-Solomon [code]
GRUB	GRand Unified Bootloader (GNU)
GS	General Standard (MIDI)
GS	Gepruefte Sicherheit
GS	Graphic Synthesizer (Sony, Playstation)
GSA	Global mobile Suppliers Association (org., mobile-systems)
GSDK	Game Software Development Kit (Linux, GGI, OpenGL)
GSDS	Genealogy Software Distribution System
GSE	GIAC Security Expert (GIAC)
GSEC	GIAC Security Essentials Certification (GIAC)
GSER	Generic String Encoding Rules (ASN1, RFC 3641/342)
GSH	Grid Service Handle (OGSI, grid)
GSIF	Global Signaling and Inter-working Forum (org.)
GSL	Graphics Software Labs (AT&T)
GSLC	GIAC Certified Security Leadership (GIAC)
GSM	Global System for Mobile communications
GSM	Groupe Speciale Mobile (org. , CEPT)
GSMA	GSM Association (org., GSM, mobile-systems)
GSMP	General Switch Management Protocol (DEC, Sprint)
GSNA	GIAC Systems and Network Auditor
GSNW	Gateway Service for NetWare (MS, Windows NT)
GSP	GNU Server Pages (GNU, Java, JSP)
GSR	Grid Service Reference (OGSI, grid)
GSRC	GigaScale Systems Research Center (org.)
GSS	Generic Security Service (IETF, GSS-API)
GSS	Group Support System
GSSAPI	Generic Security Service API (RFC 2078, API), "GSS-API"
GST	Guam Standard Time [+1000] (TZ)
GSUG	German Smalltalk Users Group (user group, Smalltalk, org.)
GSX	Graphics System eXtension
GTC	GPU Technology Conference (Nvidia, GPU)
GTDM	Group Time Division Multiplexing [protocol]
GTF	GPL'ed TLA FAQ (GPL, TLA, FAQ)
GTF	Generalized Timing Format (VESA)
GTFO	Get The Fuck Out (slang, Usenet, IRC)
GTG	Good To Go (slang, Cygwin)
GTG	got to go
GTH	go to hell
GTK	Group Transient Key (RSN, cryptography, WLAN)
GTK	[GNU] GIMP ToolKit (GNU, GUI)
GTL	Gunning Tranceiver Logic+ [bus] (Intel, SMP), "GTL+"
GTLD	Generic Top Level Domain (Internet, ICANN), "gTLD"
GTP	GPRS Tunnel Protocol (GPRS, mobile-systems)
GTS	GigaTexel Shading
GTS	Global Telecommunication System
GTSC	Global Technical Support Centre (MS)
GTSM	Generalized TTL Security Mechanism (TTL, RFC 3682)
GTSY	{glad,good} to see you
GUI	Graphical User Interface (UI)
GUID	Global[ly] Unique IDentifier (COM)
GUIDE	Graphical User Interface Design Editor (Sun)
GUILE	GNU's Ubiquitous Intelligent Language for Extension (GNU)
GULM	Global Universal Lock Manager / Grand Unified Lock Manager (GFS)
GUMO	General User Model Ontology (DFKI)
GURPS	Generic Universal RolePlaying System
GUS	Guide to the Use of Standards (SPAG)
GUUG	German Unix User Group (org., user group, Unix)
GV	GebaeudeVerteiler (cable, EN 50 173)
GVBA	Global Village Business Association (org., USA)
GVC	GNU Volunteer Coordinators (GNU)
GVRP	GARP VLAN Registration Protocol (GARP, VLAN)
GVT	Graphics Virtualization Technology (Intel)
GVV	German Volunteer Votetakers (Usenet, DANA)
GWAI	German Workshop on Artificial Intelligence (conference, AI)
GWBASIC	Graphics and Windows Beginner's All-purpose Symbolic Instruction Code (BASIC, MS-DOS), "GW-Basic"
GWDG	Gesellschaft fuer Wissenschaftliche Datenverarbeitung Goettingen [mbH] (org.)
GWPG	Graphics and Workstation Working Group (org., SPEC)
GWS	Gesellschaft fuer Wirtschafts- und Sozialkybernetik (org., Uni Marburg)
GWS	Graphics WorkShop
GWS	get well soon
GWT	Google Web Toolkit (Google, WWW, Java, AJAX)
GXA	Global XML Architecture (MS, IBM, Verisign, cryptography)
GYVE	GNU Yellow Vector Editor (GNU)
H2U	Higher capacity to UMTS (UMTS, WLAN)
H4P	High Performance Parallel Processing Project (ICI)
H8	hate
HAAPI	Human Authentication Application Program Interface (API), "HA-API"
HACL	Host Access Class Library (HOD, API)
HACMP	High Availability Clustered Multi Processing (IBM, RS/6000, Bull), "HA/CMP"
HADR	High Availability Disaster Recovery (Informix, DB2, DB)
HAL	Hackers At Large (org.)
HAL	Hard Array Logic
HAL	Hardware Abstraction Layer (Windows NT)
HAL	Heuristically programmed ALgorithmic computer (2001)
HALPC	Houston Area League of PC-Users, "HAL-PC" 
HAMPS	Host AUTODIN Message Processing System (AUTODIN, mil.)
HAMR	Heat Assisted Magnetic Recording (HDD)
HAMX	Hardware Accelerated eXcution Manager (Intel)
HAND	Have A Nice Day (slang, Usenet, IRC)
HAND	have a nice day
HANFS	Highly Available Network File System
HAP	High Assurance Platform (NSA, TCG)
HAP	Host Access Protocol (RFC 907/1221)
HARQ	Hybrid Automatic Re-transmission reQuest (WIMAX)
HAS	High Availability Subsystem (Bull)
HAT	Hashed Address Table
HAT	Help Authoring Tool
HAV	High AVailability
HAVI	Home Audio Video Interoperability (org., Grundig, Hitachi, Matsushita, Philips, Sharp, Sony, Thomson, Toshiba)
HAXM	Hardware Accelerated eXecution Manager (Intel)
HBA	Host Bus Adapter (SCSI)
HBAO	Horizon-Based Ambient Occlusion (SSAO)
HBBTV	Hybrid Broadcast Broadband TV, "HbbTV"
HBCI	HomeBanking Computer Interface [old term] Internet, banking, Germany, HBCI
HBM	High Bandwidth Memory (DRAM, JEDEC)
HBM	Host Buffer Memory (NVMe)
HBP	Human Brain Project (Europe)
HBT	Hetero Bipolar Transistor (IBM, IC)
HC	Handler Compiler (SAX, XML)
HCA	Host Channel Adapter (Infiniband)
HCF	Hybrid Coordination Function (MAC, 802.11a)
HCI	Host Controller Interface (Bluetooth, Linux)
HCI	Human Computer Interaction (BCS, conference)
HCID	Handwear Computer Input Device
HCL	Hardware Certification List (TCPA)
HCL	Hardware Compatibility List (MS, Windows)
HCL	Host Control Links
HCSDS	High Capacity Satellite Digital Service
HCSS	High Capacity Storage System (Novell, Netware)
HCT	Hamburger ComputerTage (fair)
HCT	High-speed CMOS [logic] with TTT-compatible [logic] levels (IC, MOS)
HCTDS	High-Capacity Terrestrial Digital Service
HD	High Definition [1920x1080]
HD	High Density
HDA	High Definition Audio (Intel, audio)
HDAM	Hierarchical Direct Access Method (DAM)
HDB	HoneyDanBer [standard] (Unix)
HDB3	High Density Bipolar 3
HDBMS	Hierarchical DataBase Management System (DBMS, DB)
HDC	Hard Disk Controller
HDCD	High Density Compact Disk (CD, Sony, Phillips)
HDCP	High-bandwidth Digital Content Protection (DRM, HDMI, cryptography)
HDD	Hard Disk Drive (HDD)
HDD	Highly Doped Drain (IC, MOSFET)
HDDV	High Definition Digital Video (video)
HDDVD	High Density Digital Versatile Disk (DVD, NEC, Toshiba), "HD-DVD"
HDF	Hierarchical Data Format (NCSA)
HDFS	Hadoop Distributed File System (Hadoop)
HDH	HDLC Distant Host
HDI	HOOPS Device Interface (VAGI)
HDI	High Density Interconnect
HDIT	High Bandwidth Differential Interconnect Technology [bus] (VIA)
HDL	Hardware Description Language (ASIC)
HDLC	High-level Data Link Control (ISO)
HDM	Hardware Device Module (I2O)
HDMI	High Definition Multimedia Interface (DVI, HDTV)
HDML	Handheld Device Markup Language (mobile-systems, HDTP)
HDN	Hochgeschwindigkeits-DatenNetz
HDOP	Horizontal Dilution Of Precision (GPS)
HDOS	Heath Disk Operating System (OS, Heath)
HDR	High Dynamic Range
HDR	High availability Data Replication (Informix, DB)
HDS	Hitachi Data Systems (manufacturer)
HDSL	High data / bit rate Digital Subscriber Line (BELLCORE, AT&T, DSL, BIT)
HDSL	High-level Data Specification Language
HDSP	High Definition Sound Performance
HDTP	Handheld Device Transport Protocol (mobile-systems)
HDTV	High Definition TeleVision
HDX	Half DupleX
HE	HoehenEinheit [1HE = 19"]
HE	how embarrasing
HEA	Hyundai Electronics of America (manufacturer)
HEAAC	High Efficiency Advanced Audio Coding, "HE-ACC"
HEC	HDMI Ethernet Channel (HDMI)
HEC	Header Error Check
HEC	Header Error Control (ATM)
HECTOR	HEterogeneous Computer TOgetheR (IBM, Uni Karlsruhe, Germany)
HEDT	High-End DeskTop (Intel)
HEIF	High Efficiency Image File format (MPEG)
HEL	Hardware Emulation Layer
HEL	Header Extension Length
HEMT	High Electron Mobility Transistor
HEPNET	High Energy Physics NETwork (network)
HERMES	Heuristic Emergency Response Management Expert System (XPS)
HERODE	Handling the Electronic Representation of mixed text - image Office Documents based on ECMA standard 101 (ESPRIT, SNI, TITN, ECMA, ODA)
HEROS	HEeresfuehrungsinformationssystem fuer die Rechnergestuetze Operationsfuehrung in Staeben (Bundeswehr)
HES	Home Electronic System (SNI)
HES	Honeywell Executive System (OS, Honeywell 800)
HEVC	High Efficiency Video Coding (MPEG)
HF	Have Fun (slang, Usenet, IRC)
HF	have fun
HFC	Hybrid Fiber Coax [network] (DOCSIS)
HFD	Hauptanschluss fuer Direktruf / Datenleitung (DTAG), "HfD" 
HFDS	Highly Functional Distributed System (MTRON)
HFP	Hands Free Profile (Bluetooth, SPP)
HFPA	High Fidelity Pure Audio (Universal, BD, audio, BDPA)
HFS	Hierachical File System (Apple, CD, MACOS)
HFT	High Function Terminal (AIX, IBM)
HFTS	Hybrid Frustrum Traced Shadows (Nvidia)
HGA	Hercules Graphics Adapter
HGC	Hercules Graphics Card [720x348]
HHI	Heinrich Hertz Institut Org., Germany
HHIS	hanging head in shame
HHOS	ha ha, only serious
HHVM	HipHop Virtual Machine (Facebook)
HI	Hochschulverband Informationswissenschaften (org.)
HI1	Handover Interface 1 (ETSI, ES 201671)
HI2	Handover Interface 2 (ETSI, ES 201671)
HI3	Handover Interface 3 (ETSI, ES 201671)
HIBP	Have I Been Pwned
HIC	Human Interaction Component
HIC	Hybrid Integrated Circuit
HICA	here it comes again
HICANN	High Input Count Analog Neural Network
HID	Human Interface Device (MS)
HIDAM	Hierarchical Indexed Direct Access Method (DAM)
HIFD	HIgh capacity Floppy Disk (Sony, Fuji), "HiFD"
HIFI	Hypertext Interface For Information (ESPRIT)
HIFIVE	HIgh Fidelity Interactive Visual Environment (DEC), "Hi-FIVE"
HIFT	Hardware Implemented Fault Tolerance (SIFT)
HIGGENS	Human Interface Graphical GENeration System (Uni Colorado)
HINT	Hierarchical INTegration [benchmark]
HIP	Host Identity Protocol (IETF)
HIPERLAN	HIgh PErformance Radio Local Area Network (LAN, ETSI, EN 300 652)
HIPPI	HIgh Performance Parallel Interface
HIPPI	High Performance Peripheral Interface
HIRD	HURD of Interfaces Representing Depth (GNU, HURD)
HIS	HerstellerInitiative Software Org., Germany
HISAM	Hierarchical Indexed Sequential Access Method (SAM)
HISP	HIgh SPeed channel connector (Cray, I/O)
HKS	Horowitz Key Server (PGP, GPG, PKS, SKS)
HLG	Hybrid-Log Gamma (HDR, TV, BBC, NHK)
HLL	High Level Language
HLLAPI	High Level Language Application Programming Interface (IBM, API)
HLP	High Latency Profile (video, AVC)
HLPI	Higher Layer Protocol Identifier
HLR	Home Location Register (LR, GSM, GPRS, mobile-systems)
HLRB	HoechstLeistungsRechenzentrum Bayern (org.)
HLRS	HoechstLeistungsRechenzentrum Stuttgart (org.)
HLS	HTTP Live Streaming (Apple, HTTP)
HLS	Hue, Luminance, Saturation (color system, DTP)
HLSL	High Level Shading Language (DirectX)
HM	HyperMemory (graphics)
HMA	High Memory Area
HMAC	keyed-Hashing for Message AuthentiCation (cryptography, RFC 2104)
HMC	Hardware Management Console (IBM, Linux)
HMC	Highspeed Memory Controller (Apple)
HMC	Hybrid Memory Cube (DRAM)
HMD	Head Mounted Display (VR)
HME	home medical equipment
HMI	Human-Machine Interface
HMM	Heterogeneous Memory Management
HMMP	HyperMedia Management Protocol (MS, Intel, Cisco, WWW, HMMS)
HMMS	HyperMedia Management Schema (MS, Intel, Cisco, WWW)
HMOS	High performance Metal Oxide Semiconductor (IC)
HMP	Host Monitoring Protocol (RFC 869)
HMUX	Hybrid MUltipleXer (FDDI), "H-MUX"
HNA	Host and Network Association [message] (OLSR)
HNCP	HomeNet Control Protocol
HNF	Heinz Nixdorf Museumsforum (org., Paderborn, Germany)
HNI	Heinz Nixdorf Institut (org., ZIT)
HNY	happy new year
HOA	High Order Ambisonics (MPEG)
HOAS	hold on a second
HOD	Host On Demand (IBM, HOD)
HOL	Head Of Line
HOLAP	Hybrid OnLine Analytical Processing (OLAP, DB)
HOMERF	Home Radio Frequency (WLAN), "HomeRF"
HOOPS	Hierarchical Object Orientated Picture System (Ithaca, cardesk, OOP)
HOP	Homecast Open Protocol (WLAN, Alation Systems)
HOPP	Half Object Plus Protocol
HOPS	half-operator status
HOS	High Order Surfaces (3D)
HOT	Heat Orchestration Template
HOTP	HMAC-based One-time Password (HMAC)
HP	Hewlett Packard (manufacturer)
HPA	High Performance Architecture (HP)
HPBIDS	Hewlett Packard Broadband Internet Delivery System (HP, Internet), "HP BIDS"
HPC	Handheld Personal Computer (PC), "H/PC"
HPC	High Performance Computing
HPCC	High Performance Computing and Communication
HPCS	High Performance Communication Server (Tobit, NLM, Netware)
HPCS	High Productivity Computing System (DARPA, Cray, IBM, Sun, ...)
HPE	Hewlett Packard Enterprise (HP, manufacturer)
HPET	High Precision Event Timer (IC, Intel, MS)
HPF	High Performance FORTRAN (FORTRAN)
HPFS	High Performance FileSystem (OS/2, FS)
HPG	High Performance Group (org., SPEC)
HPGL	Hewlett Packard Graphics Language (CAD, CAM, HP)
HPIB	Hewlett Packard Interface Bus (GPIB)
HPKP	HTTP Public Key Pinning (HHTP, cryptography)
HPLIP	Hewlett Packard Linux Imaging and Printing (HP, Linux)
HPM	Hyper Page Mode
HPMI	Hewlett Packard Model Interface (CAD, HP), "HP-MI"
HPNA	???
HPOFS	High Performance Optical File System (IBM, OS/2, MOD)
HPPA	Hewlett Packard Precision Architecture (HP, RISC)
HPPCL	Hewlett Packard Printer Control Language
HPPRM	Hewlett Packard Process Resource Manager (HP), "HP PRM"
HPR	High Performance Routing
HPR	High Priority Request (VUMA)
HPRILOE	??? - Remote Insight Lights-Out Edition, "HP-RILOE"
HPS	Hardware Product Services
HPS	High Performance Switch (IBM)
HPTS	High Performance Transaction Systems
HPUX	Hewlett Packard / UniX (Unix), "HP/UX" 
HPVEE	Hewlett-Packard Visual Engineering Environment (HP, GUI), "HP VEE"
HPVUE	Hewlett Packard - Visual User Environment (HP, GUI), "HP-VUE"
HQL	Hibernate Query Language
HR	High Rate (IEEE 802.11)
HRC	Hybrid Ring Control (FDDI)
HRFWG	Home Radio Frequency Working Group (WLAN, HOMERF)
HRMS	Human Resource Management System (Peoplesoft)
HRTF	Head Related Transfer Function (VR)
HS	High Speed (MODEM)
HSA	Heterogenous Systems Architecture (AMD)
HSA	High Speed Access
HSB	Hue Saturation Brightness (DTP)
HSC	HTML Sucks Completely (HTML, Amiga)
HSC	Hierarchical Storage Controller
HSCDS	High Speed Cable Data Services
HSCSD	High Speed Circuit Switched Data (GSM, mobile-systems)
HSD	Host Storage Domain (HDS)
HSDPA	High Speed Downlink Packet Access (UMTS, HSUPA, mobile-systems)
HSDRAM	High-speed Synchronous Random Access Memory (RAM, DRAM, IC)
HSFS	High Sierra File System
HSI	High Speed Interconnect (Nvidia, AGP, PCIe)
HSI	High Speed Interface
HSI	Hue, Saturation, Intensity (DTP)
HSIE	Homeland Security Information Exchange (Expertelligence, Grid), "HS/IE"
HSIS	??? High Speed Interface / SNA, "HSI/S" 
HSLAN	High Speed Local Area Network, "HS-LAN" 
HSLFX	Hierarchical Specification Language - Function Extension (HDL, NTT, LSI), "HSL-FX"
HSLN	High Speed Local Network
HSM	Hardware Security Module (banking)
HSM	Hardware Specific Module (ODI)
HSM	Hierarchical Storage Management
HSM	Hierarchisches SpeicherManagement
HSMD	High Speed Mobile Data HSCSD, Germany, E-Plus
HSP	Host Signal Processing (telecommunication, WinModem)
HSP	[UUNet] HighSpeed Peering
HSPA	High Speed Packet Access (UMTS, HSDPA, HSUPA, mobile-systems)
HSR	Hidden Surface Removal (3D)
HSRP	Hot Standby Router Protocol (Cisco, IOS)
HSSDS	High-Speed Switched Digital Service
HSSI	High Speed Serial Interface
HSSM	Hicommand Storage Services Manager (HDS)
HSSN	HighSpeed Switching Network (Cray, ATM)
HST	Hawaiian Standard Time [-1030] (TZ)
HST	High Soft Tech (manufacturer, ISDN)
HST	High Speed Technology (US Robotics)
HSTS	HTTP Strict Transport Security (HTTP, cryptography, RFC 6797)
HSUPA	High Speed Uplink Packet Access (UMTS, HSDPA)
HSV		Hue Saturation Value (color system, DTP)
HSVGA	Hex Super VGA (VGA, SVGA, QUXGA)
HSXGA	Hex Super XGA [5120x4096] (XGA)
HT	Horizontal Tab
HT	Hyper-Threading (Intel, Pentium, SMT, CPU)
HTA	HTML Applications (MS, HTML)
HTB	Hierarchical Token Bucket
HTC	HTML Components (MS, OWA, WWW, HTML)
HTC	Hardware Thermal Controller (AMD, IC, CPU)
HTCPCP	Hyper Text Coffee Pot Control Protocol
HTDM	Hybrid Time Division Multiplexing [protocol]
HTF	Hyper-g Text Format (Hyper-G)
HTH	Hope This Helps (slang)
HTH	hope this helps
HTML	HyperText Markup Language (Internet, WWW, SGML, RFC 1866/1942, HTML)
HTPC	Home Theater Personal Computer (PC)
HTPS	High Temperature PolySilicon
HTSI	Host Transport Service Interface (ICC, CT-API)
HTTP	HyperText Transfer Protocol (WWW, RFC 2068/2616)
HTTPD	HyperText Transfer Protocol DAEMON (WWW, HTTP)
HTTPNG	HyperText Transfer Protocol - Next Generation (WWW), "HTTP-NG"
HTTPR	HyperText Transfer Protocol - Reliable (HTTP, IBM)
HTTPS	HyperText Transfer Protocol [SSL] Secured (HTTP, SSL, WWW)
HUD	Head-Up Display (AG)
HUGO	Holland User Group for OS/2 (org., user group, OS/2, Netherlands)
HUMA	Heterogenous Uniform Memory Access (PS4), "hUMA"
HUMAINE	HUman-MAchine Interaction Network on Emotion [project] (Europe)
HURD	HIRD of Unix-Replacing DAEMONs (GNU, HIRD)
HUXGA	Hex Ultra XGA [6400x4800] (XGA)
HVC	Holografic Versatile Card
HVC	Hue-Value-Chroma [model] (Tektronic, DTP)
HVD	High Voltage Differential [technology] (SCSI)
HVD	Holografic Versatile Disc
HVD	Hosted Virtual Desktop
HVGA	Half Video Graphics Array [320x480] (VGA)
HVM	Hardware Virtual Machine
HWE	HardWare Enablement [stack] (Linux, Ubuntu)
HWMC	HardWare Motion Compensation
HXGA	Hex XGA [4096x3072] (XGA)
HYCH	Hope You Can Help (slang, Usenet, IRC)
HYTEA	HYperText Environment for Authoring (ESPRIT)
HYTIME	Hypermedia/Time-based structuring language (SGML, ISO, IEC, IS 10744), "HyTime"
HYTM	HyTime Topic Map (SGML, KM), "HyTM"
I16L32P16	Integer 16 [bit], Long 32 [bit], Pointer 16 [bit] (BIT)
I16LP32	Integer 16 [bit], Long and Pointer 32 [bit] (BIT)
I2C	Inter Integrated Circuit [bus]
I2O	Intelligent Input/Output (Intel)
I2O	Intelligent Input/Output [bus]
I32LP64	Integer 32 [bit], Long and Pointer 64 [bit] (BIT)
I3C	International Imaging Industry Association (org., PIMA, successorr)
I3DL2	Interactive 3D Audio Level 2 (audio)
I4DL	Interface, Inheritance, Implementation, Installation Definition Language (DME, OSF)
I4L	ISDN for Linux (Linux, ISDN)
IA	Identification and Authentication, "I & A"
IA32	Intel Architecture - 32 [BIT] (Intel, BIT), "IA-32"
IA32E	Intel Architecture - 32 [BIT] Enhanced (Intel, IA32), "IA32e"
IA64	Intel Architecture - 64 [BIT] (Intel, BIT), "IA-64"
IAA	Initial Address Acknowledgment
IAA	Intel Application Accelerator
IAAIL	International Association for Artificial Intelligence and Law (org., AI)
IAAS	Infrastructure As A Service
IAB	Internet Activities / Architecture Board (RFC 1160/1601, Internet)
IAC	InterApplication Communication (Apple)
IAC	International Association for Cybernetics (org.)
IAC	in any case
IACT	International Alliance for Compatible Technology (org.)
IAE	ISDN AnschlussEinheit (ISDN, DTAG)
IAE	in any event
IAF	Internet Address Finder (WWW)
IAFNAB	It's A Feature, Not A Bug (slang, Cygwin)
IAHC	Internet Ad Hoc Committee (org., Internet)
IAI	Institut fuer Angewandte Informatik (org.)
IAK	Internet explorer Administrator Kit (MS, Internet)
IAK2	Internet Access Kit / 2 (IBM, OS/2), "IAK/2"
IAL	Intel Architecture Labs (Intel)
IAM	Identity and Access Management
IAM	Initial Address Message
IAMT	Intel Active Management Technology (Intel), "iAMT"
IANA	Internet Assigned Numbers Authority (Internet)
IANACE	I Am Not A Cygwin Expert (slang, Cygwin)
IANAL	I Am Not A Lawyer (slang, Usenet, IRC)
IANAL	I am not a lawyer
IANS	Intel Advanced Networking Services, "iANS"
IANW	International Academic Networkshops (Konferenz)
IAO	[Fraunhofer] Institut fuer Arbeitswirtschaft und Organisation (org., Stuttgart, Germany)
IAOG	International ADMD Operators Group (org., ADMD, X.400)
IAONA	Industrial Automation Open Networking Alliance (org., Europe)
IAP	In-App Purchase
IAP	Internet Access Provider (Internet)
IAPC	Instantly Available Personal Computer (Intel, PC)
IAPC	Intel Architecture Personal Computer (PC, Intel), "IA-PC"
IAPP	Inter Access Point Protocol (AP, WLAN, IEEE 802.11f)
IAPR	International Association on Pattern Recognition (org.)
IAR	Initial Address Reject
IARP	International Advanced Robotic Program (org.)
IAS	Interactive Application System (DEC)
IAS	Internet Authentication Server (MS, Windows)
IASA	IETF Administrative Support Activity (IETF, RFC 4071/4371)
IAT	Information Access Technology (Provider)
IAUG	International AIX User Group (org., Unix, AIX, user group)
IAW	In Accordance With (slang, Usenet, IRC)
IAW	in another window
IAWTC	I agree with this comment
IAWTP	I agree with this post
IAX	Inter Asterisk eXchange (VoIP, OSS)
IAY	I adore you
IB	I'm back
IB	In Band (S-ATA)
IB4J	Instant BASIC for Java (Java, BASIC)
IBA	Infini-Band Architecture (Intel, Infiniband)
IBAN	International Bank Account Number (banking)
IBASES	Intel Baseline AGP System Evaluation Suite (AGP, Intel)
IBB	Internet Bug Bounty (Internet, OSS)
IBC	InterBase Components (Borland, Delphi, InterBase)
IBCN	Integrated Broadband Communication Network
IBCS2	Intel Binary Compatibilty Specification 2 [emulator], "iBCS2"
IBEX	International Business EXchange (network)
IBFI	Internationales Begegnungs- und Forschungszentrum fuer Informatik (org., GI)
IBFN	Integriertes BreitbandFernmeldeNetz
IBGP	Internal Border Gateway Protocol (BGP, eBGP), "iBGP"
IBM	International Business Machines (manufacturer, IBM)
IBMS	Integrated Broadband Mobile System
IBN	Integrated Business Network
IBO	InterBase Objects (Borland, InterBase)
IBPB	Indirect Branch Prediction Barrier
IBSS	Independent Basic Service Set (IEEE 802.11i, WLAN)
IBTA	InfiniBand Trade Association (org., IBM, HP, Compaq, Sun, Dell, MS, ...)
IC	I see
IC	Integrated Circuit
ICA	Image Scanner Acquisition
ICA	Independent Computing Architecture (Cytrix, Windows NT, ASP)
ICA	Information Connection Architecture (SGI)
ICA	Integrated Chameleon Architecture (SGML)
ICA	Integrated Communications Architecture
ICA	Intelligent Communication Adapter (Banyan, VINES)
ICA	International Communications Association (org.)
ICADD	International Committee for Accessible Document Design (org.)
ICAL	Internet CALendar [protocol], "iCAL"
ICALP	International Colloquium on Automata, Languages and Programming (EATCS, conference)
ICAN	Individual Customer Access Network
ICAN	Integrated Composite Application Network (Seebeyond, Java)
ICANN	Internet Corporation for Assigned Names and Numbers (org., Internet, ICANN)
ICAP	Internet Calendar Access Protocol (TCP/IP, Lotus)
ICARA	International Conference on Autonomous Robots and Agents
ICAT	Interactive Code Analysis Tool [debugger] (IBM, Java)
ICBW	I could be {worse,wrong}
ICC	Intelligent Communications Control
ICC	Intergrated Circuit Card (ICC)
ICC	International Color Committee (org., DTP)
ICC	International Conference on Communications (Konferenz)
ICC	Internode Communication Channel (SMP, Scalis)
ICC	Interrupt Controller Communications [bus] (PC)
ICCAD	International Conference on Computer Aided Design (IEEE, conference)
ICCB	Internet Control and Configuration Board (IAB, predecessor)
ICCC	InterClient Communication Convention (X-windows)
ICCC	International Conference on Computer Communication (Konferenz)
ICCC	International Council on Computer Communication (org.)
ICCCM	InterClient Communication Convention Manual (X-Windows)
ICCD	International Conference on Computer Design (IEEE, conference)
ICCI	International Conference on Computing and Information (Konferenz)
ICCIMA	International Conference on Computational Intelligence and Multimedia Applications (AI, conference)
ICCL	I couldn't care less
ICCP	Inter Control Center Protocol (TASE)
ICCS	Integrated Communications Cabling System (SNI)
ICD	Installable Client Driver (OpenGL)
ICD	International Code Designator (ATM)
ICDA	Integrated Cached Disk-Arrays
ICDB	Integrated Communications DataBase (DB)
ICDCS	International Conference on Distributed Computing Systems (INRIA, IEEE-CS)
ICE	Image Correction Enhancement (Minolta, Nikon, Epson, Scanner)
ICE	In-Circuit-Emulation
ICE	Information and Content Exchange [protocol] (XML)
ICE	Insane Creator Enterprise, "iCE"
ICE	Internal Compiler Error (GCC)
ICF	Integrated Coupling Facility (IBM, PU)
ICF	International Cryptographic Framework (HP, cryptography)
ICH	I/O Controller Hub [aka Southbridge] (Intel, I/O, GMCH)
ICH	Intelligent Connection Handling (BIG)
ICI	Industrial Computing Initiative (LLNL, LANL, Cray, ..., HPC, MPP)
ICIA	International Communications Industries Association (org.)
ICIAI	International Communications Industries Association Inc. (org.)
ICIE	International Center for Information Ethics (org.)
ICIEA	IEEE Conference on Industrial Electronics and Applications (IEEE)
ICL	International Computers Limited (manufacturer, UK, USA, Japan, Fujitsu)
ICM	Image Color Matching (MS, Windows 95, API)
ICMB	Intelligent Chassis Management Bus (IPMI)
ICMC	International Computer Music Conference (fair)
ICMP	Internet Control Message Protocol [version 4] (TCP/IP, RFC 792, Internet)
ICMPV6	Internet Control Message Protocol Version 6 (Internet, IPV6, RFC 1885), "ICMPv6"
ICMX	Interface for Communications Manager uniX (Unix, CMX)
ICONZ	Internet Company Of New Zealand (org., Usenet)
ICOT	Institute for new generation COmputer Technology (org., Japan, FGCS)
ICP	Independent Content Provider (MSN)
ICP	Intelligent Computer Peripherals (manufacturer)
ICP	Interface Change Proposal
ICP	International Client Pack (MS)
ICP	Internet Caching Protocol (Internet)
ICPS	Image et Calcul Parallele de Scientifique (org., France, HPC)
ICPS	Informatique et Calcul Parallele de Strasbourg [old term] (org., France, HPC)
ICQ	[I seek you] (Internet, ICQ, IM)
ICR	Intelligent Character Recognition
ICRA	International Conference on Robotics and Automation
ICRA	Internet Content Rating Association (Internet, org., IBM, MS, AOL, ...)
ICRC	Invariant Cyclic Redundancy Check (Infiniband), "I-CRC"
ICS	IBM Cabling System
ICS	Ice Cream Sandwich (Android, OS)
ICS	International Classification for Standards (ISO)
ICS	Internet Connection Sharing (MS, IE, DHCP)
ICS	Irish Computer Society (org., Irland)
ICSC	Intelligent Channel/Storage Control, "IC/SC" 
ICSI	International Computer Science Institute (org., USA)
ICSP	In Circuit Serial Programming
ICSS	Internet Connection Secure Server (IBM, WWW)
ICST	International Conference on Sensing Technology
ICT	Image Constraint Token (DOT)
ICT	Information and Communication Technology
ICT	Information and Communications Technologies
ICT	Institute of Computing Technology (org., China)
ICTF	Internet Content Task Force (org., Internet)
ICTS	[Champion] Integrated Cached Tape Subsystem (EMC, AS/400)
ICU	ISA Configuration Utility (BIOS, PNP, ISA)
ICU	Instruction Cache Unit (CPU, POWER)
ICU	Interactive Chart Utility (IBM, GDDM)
ICU	International Components for Unicode (IBM, API, Unicode)
ICUR	I see you are
ICURYY	I see you are too wise (slang)
ICYMI	in case you missed it
ID	IDentification
IDA	Interchange of Data between Administrations (org., Europe)
IDA	Interface for Distributed Automation (TCP/IP)
IDAC	Infobus Data Access Component (Lotus, Java)
IDAPI	Integrated Database API (DB, IBM, Novell, Borland, predecessor, BDE, API)
IDAS	Interchange DAta Structure
IDB	Integrated DataBase (DB)
IDBEF	Integrated DataBase Extract Format (IDB, DB)
IDBTF	Integrated DataBase Transaction Format (IDB, DB)
IDC	I don't care
IDC	Inter-Device Communication (IBM, OS/2)
IDC	International Data Corporation
IDC	Internet Database Connector (MS, WWW)
IDCT	Inverse Discrete Cosine Transformation (DCT)
IDDD	International Direct Distance Dialing
IDE	Integrated Development Environment
IDE	Integrated Drive Electronics (HDD)
IDEA	International Data Encryption Algorithm (cryptography)
IDEA	Internet Design, Engineering, and Analysis notes (IETF)
IDEC	I Don't Even Care (slang, Usenet, IRC)
IDEF	Integrated [CAM] DEFinition (CAM)
IDES	International Demonstration and Education System (R/3, SAP)
IDES	Intrusion Detection Expert System (IBM, IDS, XPS)
IDF	Intel Developer Forum (Intel, conference)
IDF	International DOI Foundation (org., DOI)
IDG	International Data Group (org.)
IDGI	I don't get it
IDGW	in a good way
IDI	I doubt it
IDI	Initial Domain Identifier (NSAP, IDP)
IDIFTL	I did it for the lulz
IDIS	Integrated Dealer and Importer System (MBAG)
IDK	I don't know
IDL	Interactive Data Language (Research Systems)
IDL	Interface Definition Language (DCE, CORBA, Java)
IDLC	ISDN Data Link Control (ISDN)
IDLE	Integrated DeveLopment Environment (Python)
IDLE	International Date Line, East [+1200] (TZ)
IDLW	International Date Line, West [-1200] (TZ)
IDML	InDesign Markup Language
IDMR	Inter-Domain Multicast Routing (IETF, WG, Multicast)
IDMT	[Fraunhofer] Institut fuer Digitale MedienTechnologie (org.)
IDN	Integrated Digital Network
IDN	Internationalized Domain Names (Domain, Internet)
IDNA	Internationalized Domain Names in Applications (Domain, RFC 3490)
IDOC	Intermediate DOCuments (ALE, SAP)
IDOMENEUS	Information and Data on Open MEdia for NEtworks of USers (WWW, Uni Hamburg, Germany)
IDP	Initial Domain Part (NSAP)
IDP	Internal DisplayPort, "iDP"
IDP	Internet Datagram Protocol (XNS)
IDP	Intrusion Detection and Prevention (IDS)
IDQ	Instruction Decode Queue (Intel, CPU)
IDRC	I don't really care
IDRC	Improved Data Recovery Capability (Datenkompression)
IDS	Information Delivery System
IDS	Informix Dynamic Server (Informix, DB)
IDS	Intelligent Decision Server (IBM)
IDS	Inter Data Systems [gmbh] (manufacturer)
IDS	Internal Directory System
IDS	Intrusion Detection System (IDS, IPS)
IDSA	Interactive Digital Software Association (org., Nintendo, Sony, MS, ...)
IDSS	Interoperability Decision Support System
IDT	Integrated Device Technology (manufacturer)
IDT	Interrupt Descriptor Table
IDTRC	Interrupt Descriptor Table Register Cache (IDT, CPU, Intel)
IDTS	I don't think so
IDTT	I drink to that
IDU	Interface Data Unit
IDUPGSSAPI	Independent Data Unit Protection Generic Security Service API (GSS, API), "IDUP-GSS-API"
IDV	Individuelle DatenVerarbeitung
IDVC	Integrated Data/Voice Channel
IE	Informal Exceptions (HDD, SCSI)
IE	Information Element (ATM, ISDN)
IE	Information Engineering
IEAAIE	[international conference on] Industrial and Engineering Applications of Artificial Intelligence and Expert systems (conference, ISAI, ..., AI), "IEA/AIE"
IEC	Inter-Exchange Carrier (AT&T, MCI, LEC)
IEC	International Electrotechnical Commission (org., Switzerland)
IECC	Informix Enterprise Command Center (Informix)
IED	Intelligent Electronic Device
IEDM	International Electron Device Meeting (Konferenz)
IEE	Institute of Electrical Engineers (org., UK)
IEEE	Institute of Electrical and Electronic Engineers (org., USA)
IEEECS	Institute of Electrical and Electronic Engineers - Computer Society (org., IEEE), "IEEE-CS"
IEEESA	Institute of Electrical and Electronic Engineers Standards Association (org., IEEE), "IEEE-SA"
IEEJ	Institute of Electrical Engineers of Japan (org., Japan)
IEF	Information Engineering Facility
IEICE	Institute of Electronics, Information and Communication Engineers (org., Japan)
IEMMC	Internet EMail Marketing Council (Internet, org., spam)
IEMSI	Interactive Electronic Mail Standard Identification
IEN	Internet Engineering Notes
IEN	Internet Experiment Notebook (predecessor, RFC)
IEPA	Individual Expert Participation Agreement (Sun)
IEPG	Internet Engineering and Planning Group (Internet, RFC 1690)
IEPRC	International Electronic Publishing Research Centre (org., PIRA)
IERAT	Instruction cache Effective to Real Address Translation [table] (Power4, IBM, CPU, ERAT)
IES	Integrated Engineering Station (Toshiba, TOSMAP-DS)
IES	Intelligent Emulation Switching (Epson)
IESE	[Fraunhofer] Institut fuer Experimentelles Software Engineering (org.)
IESF	International Esports Federation (org.), "IeSF"
IESG	Internet Engineering Steering Group (IETF)
IETF	Internet Engineering Task Force (org., IAB, Internet, RFC 1603/2418/3233)
IETFWG	Internet Engineering Task Force - Working Group (RFC 1603, IETF), "IETF-WG"
IETM	Interactive Electronic Technical Manual
IETS	Interim European Telecommunications Standards (GSM, mobile-systems)
IEW	Information Engineering Workbench (IBM)
IF	Information Flow (IN)
IFAC	International Federation for Automatic Control (org., Austria)
IFAD	Institute of Applied Computer Science (org., Denmark)
IFAR	Instruction Fetch Address Register (Power4, IBM, CPU)
IFC	Industry Foundation Classes (CAD)
IFC	InterFace Clear (GPIB)
IFC	Internet FAQ Consortium (Internet, FAQ, org.)
IFC	Internet Foundation Classes (ONE, Netscape, Java)
IFCM	Independent Flow Control Messages (SSP)
IFCP	Internet Fibre Channel Protocol (SAN, FC, IP), "iFCP"
IFD	Information Flow Diagram (IRM)
IFE	Internet Forum Europe (fair)
IFEO	Image File Execution Options (MS)
IFF	if and only if
IFIOM	Intelligent FDDI Input Output Module (SMC, ES/1, FDDI)
IFIP	International Federation for Information Processing (org.)
IFL	Integrated Facility for Linux (IBM)
IFMP	Ipsilon Flow Management Protocol (IP, RFC 1953)
IFNA	International FidoNet Association (org., Fido)
IFP	Instruction Fetch Pipeline (Motorola, CPU)
IFR	Interleaved Frame Recording (video)
IFROSS	Institut fuer Rechtsfragen der Freien und Open Source Software Org., OSS, Germany, "ifrOSS"
IFS	ICOT Free Software (ICOT)
IFS	Installable File System (OS/2, DOS)
IFS	Intelligent Fax System (Ricoh)
IFS	InterFrame Space (MAC, 802.11a)
IFS	Internal Field Separator (Unix, AWK)
IFS	Internet File System (Oracle, DB, Internet)
IFTTT	if this then that
IFX	Interactive Financial eXchange (USA, banking)
IGBT	Insulated Gate Bipolar Transistor (IC)
IGC	Institute for Global Communications (USA)
IGD	Internet Gateway Device (Internet)
IGD	[Fraunhofer] Institut fuer Graphische Datenverarbeitung (org., Darmstadt, Germany)
IGES	Initial Graphics Exchange Specification (ANSI, USA, CIM, CAD)
IGMP	Internet Group Management / Multicast Protocol (RFC 1112/2236, IP, Multicast)
IGN	IBM Global Network (network)
IGOS	Indonesia Goes Open Source [initiative] (OSS)
IGOSS	Industry/Government Open System Specification
IGP	Integrated Graphics Processor (IC, Nvidia)
IGP	Interior Gateway Protocol
IGRP	Interior Gateway Routing Protocol (IPX, Novell)
IGS	IBM Global Services (IBM)
IGZO	Indium Gallium Zinc Oxide (LCD)
IHBW	I have been wrong
IHS	Integrated Heat Spreader (CPU)
IHV	Independent Hardware Vendor
IIA	Information Industry Association (org.)
IIANM	if I am not mistaken
IIASA	International Institute for Applied Systems Analysis (org., Austria)
IIC	Industrial Internet Consortium (org.)
IICM	Institute for Information processing and Computer supported new Media (org., OEstereich)
IID	Interface IDentifier (COM)
IIF	Incoming InterFace (PIM, OIF, Multicast)
IIF	Internal Internegotiation Function (ETSI, ES 201671)
IIIR	Integration of Internet Information Resources (IETF)
IIIS	International Institute of Informatics and Systemics (org., USA)
IIL	Integrated Injection Logic
IIM	Internet Identified Mail (Cisco, SPAM)
IIN	Integrated Information Network
IIOP	Internet Inter-ORB Protocol (CORBA, Internet, ONE, GIOP, TCP/IP)
IIP	Interoperability Improvement Panel
IIR	Infinite Impulse Response (DSP)
IIRA	Industrial Internet Reference Architecture (IIC)
IIRC	If I Remember/Recall Correctly (Usenet, IRC, slang)
IIRC	if I {recall,remember} correctly
IIRWIIR	It Is Ready When It Is Ready (slang, IRC, Usenet)
IIS	Intelligence Information System (mil.)
IIS	Internet Information Server / Services (MS)
IIS	[Fraunhofer] Institut fuer Integrierte Schaltungen (org.)
IISP	Interim Inter-Switch Signaling Protocol (P-NNI, ATM)
IIT	Integrated Information Technology
IITC	Ingress Intel Total Conversion
IITF	Information Infrastructure Task Force (org., USA)
IIUC	If I Understand Correctly (slang, Usenet, IRC)
IIUC	if I understand correctly
IJCAI	International Joint Committee / Conference on Artificial Intelligence (conference, org., AI)
IJG	Independent JPEG Group (org., JPEG)
IJH	Initial Java Heap (Java)
IJIE	International Journal of Information Ethics [old term] (ICIE)
IKD	Integrated Kernel Debugger (Linux)
IKE	IBM Kiosk for Education (IBM)
IKE	Internet Key Exchange [protocol] (IPSEC, IPV6)
IKP	Internet Keyed Payment [protocols] (IBM, WWW), "iKP"
IKR	I know, right?
IKT	Informations- und Kommunikationstechnik
IKWUM	I Know What You Mean (slang, Usenet, IRC)
IKWYM	I know what you mean
IKYABWAI	I know You Are But What Am I? (slang, Usenet, IRC)
IL	Instruction List
IL32P64	Integer and Long 32 [bit], Pointer 64 [bit] (BIT)
ILEC	Independent Local Exchange Carrier
ILETS	International Law Enforcement Telecom Seminars (ETSI)
ILFA	Integrierte Logische Funktionen fuer Anwendungen (IWBS, Uni Karlsruhe, Germany, Uni Duisburg, Germany)
ILLIGAL	ILLinois Genetic Algorithm Laboratory (org., Uni Illinois, USA), "IlliGAL"
ILLINET	ILlinois LIbrary NETwork (network, USA)
ILM	Information Lifecycle Management (HSM)
ILMI	Interim Link / Local Management Interface (ATM)
ILO	Integrated Lights Out (HP, JAVA, BMC), "iLO"
ILP	Instruction Level Parallelism (CPU)
ILP32	Integer, Long and Pointer 32 [bit] (BIT)
ILPNET	[european] Inductive Logic Programming scientific NETwork
ILS	Intelligente LernSysteme
ILS	Internet Locator Service (MS)
ILSVRC	Imagenet Large Scale Visual Recognition Competition (ImageNet)
ILT	[Linux] Instructor Led Training (Linux, Caldera)
ILU	I love you
ILVU	InterLeaved Video Units (VOB, DVD, video)
ILY	I love you
IM	Information Management
IM	Instant Messaging (IM)
IM	Interface Module
IMA	Integrated Modular Avionics (Airbus, A380)
IMA	Interactive Multimedia Association (org.)
IMA	International MIDI Association (org.)
IMA	Internationalized e-Mail Address
IMAC	Isochronous Media Access Control (FDDI), "I-MAC"
IMACS	International Association for Mathematics and Computers in Simulation (org.)
IMAIL	Intelligent MAIL
IMAL	Integrated Media Architecture Laboratory (Bell, org., USA)
IMAO	In My Arrogant Opinion (slang, Usenet, IRC)
IMAO	in my arrogant opinion
IMAP	Internet Message Access Protocol (RFC 2060)
IMAPI	Image Mastering Applications Programming Interface (API)
IMAV	IT Management Added Value (IT)
IMB	Intel Media Bench
IMBO	in my biased opinion
IMC	Information Management Concept
IMC	Information Management and Communication (org., UK, Liverpool Hope University), "IM&C"
IMC	Information, Management und Consulting [GmbH] Germany
IMCC	InterMediate Code Compiler (PERL)
IMCO	In My Considered Opinion (slang, Usenet, IRC)
IMCO	in my considered opinion
IMD	Integrated Management Display (Compaq)
IMD	Internet Multimedia Development (Internet)
IMDB	Internet Movie DataBase (Internet, WWW, DB), "IMDb"
IME	Input Method Editor (MS, Windows)
IME	in my experience
IMEI	International Mobile Equipment Identity (MS, GSM, mobile-systems)
IMFT	Intel Micron Flash Technologies (Intel, manufacturer)
IMG	IMplementation Guide (R/3, SAP)
IMHO	In My Humble Opinion (slang, Usenet, IRC)
IMHO	in my humble opinion
IMIA	International Medical Informatics Association
IML	Initial Machine Load
IMLE	Intelligent Mechatronic Solution Elements (Uni Paderborn, Germany)
IMMD	Institut fuer Mathematische Maschinen und Datenverarbeitung (org., Uni Erlangen, Germany)
IMNSCO	In My Not So Considered Opinion (slang, Usenet, IRC)
IMNSHO	In My Not So Humble / Honest Opinion (slang, Usenet, IRC)
IMNSHO	in my not so humble opinion
IMO	In My Opinion (slang, Usenet, IRC)
IMO	in my opinion
IMP	Interface Message Processors (ARPANET, MILNET)
IMPACT	Information Market Policy ACTions (ECHO)
IMPP	Instant Messaging and Presence Protocol (IETF, IM)
IMR	Information Management Representitive (IM)
IMR	Internet Monthly Report (Internet)
IMR	Interrupt Mask Register (IC)
IMS	IP Multimedia Subsystem (PoC, IP)
IMS	Information Management System (IBM)
IMS	Integrated Management System
IMS	Integrated Measurement Systems [inc] (manufacturer)
IMS	Intelligent Manufacturing System (MITI)
IMS	International Meta Systems (manufacturer)
IMS	Internet Multimedia Subsystem (Internet, 3GPP)
IMS	[Fraunhofer] Institut fuer Mikroelektronische Schaltungen und systeme (org., Dresden, Germany)
IMSESA	Information Management System/Enterprise Systems Architecture (IBM), "IMS/ESA"
IMSI	International Mobile Subscriber Identity (MM, GSM, mobile-systems)
IMSO	Integrated Micro Systems Operation (Intel)
IMSP	Internet Message Support Protocol (Internet)
IMSVS	Information Management System/Virtual Storage, "IMS/VS" 
IMT2000	International Mobile Telecommunications [at] 2000 [Mhz] (mobile-systems), "IMT-2000"
IMTC	International Multimedia Teleconferencing Consortium (org., MS, Intel, Apple, IBM, SNI, AT&T, ...)
IMU	Inertial Measurement Unit
IMUNE	Intrusion Mitigation Unified Network Engine (Symantec, IDS)
IMVP	Intel Mobile Voltage Positioning (Intel)
IMY	I Miss You (slang, Usenet, IRC)
IN	Individual Network [e.v.] (org., ISP)
IN	Intelligent Network (ITU-T, Q.1200)
INA	Intelligent Network Architecture (IN)
INAP	Intelligent Network Application Part / Protocol (IN, SS7)
INB4	in before
INCITS	International Committee for Information Technology Standards (org., USA)
INCM	Intelligent Network Conceptual Model (IN)
INCORE	INternet COntent Rating for Europe (org., Internet)
INDC	[international conference on] Information Networks and Data Communication (IFIP, conference)
INDE	Integrated Native Developer Experience (Intel)
INET	International NETworking conference (Konferenz), "iNET" 
INGRES	INteractive Graphic REtrieval System
INHOPE	INternet HOtline Providers in Europe (org., ISP)
INL	Inter Node Link
INMS	Integrated Network Management System
INN	Inter Node Network
INNC	International Neural Network Conference (INNS, conference, NN)
INNS	International Neural Network Society (org., AI, NN)
INOC	Internet Network Operations Center
INPO	in no particular order
INPOL	INformationssystem der POLizei
INRIA	Institut National de Recherche en Informatique et Automatique (org., France)
INSITS	INternational Symposium on IT Standardization (conference, IFIP, GI)
INST	INformation Standards and technology Standardization
INTA	International Trademark Association (org.)
INTAP	Interoperability Technology Association for Information Processing (org.)
INTEL	INtegriertes TEileLogistiksystem (MBAG)
INTERNIC	Inter Network Information Center (org., Internet), "InterNIC"
INTP	INTercom Profile (Bluetooth), "IntP"
INX	INformation eXchange
INXS	INternet eXchange Service (ECRC)
IO	Input/Output, "I/O" 
IOAT	Input/Output Acceleration Technology (Intel, Xeon), "I/OAT"
IOC	Initial Operational Capability
IOC	Input / Output Controller
IOC	Input/Output Cluster (Cray, I/O)
IOCCC	International Obfuscated C Code Contest
IOCS	Input Output Control System (OS, IBM 7090)
IOCTA	Internet Organised Crime Threat Assessment (EC3)
IOCTL	I/O ConTroL (I/O)
IOM	Integrated Object Model
IOMMU	Input Output Memory Management Unit (AMD, Athlon)
ION	Internetworking Over NBMA (LIS, LAG, ATM, NBMA)
IONL	Internal Organization of the Network Layer (OSI)
IOOC	Integrated Optics and Optical fiber Communication (Konferenz)
IOP	Input / Output Processor
IOPL	Input Output Privilege Level
IOPLL	IO Phase Lock Loop (IO, Intel, CPU)
IOPS	Input Output Per Second
IOS	InterOrganizational Systems
IOS	Internetworking Operating System (Cisco, OS)
IOT	Index Organized Table (Oracle, DB)
IOT	Internet Of Things (Internet), "IoT"
IOTE	Initial Operational Test and Evaluation, "IOT & E"
IOTTMCO	Intuitively Obvious To The Most Casual Observer (slang, Usenet, IRC)
IOUG	International Oracle Users Group (org., DB, Oracle, user group)
IOW	In Other Words (telecommunication, Usenet, IRC)
IOW	in other words
IP	Information Provider
IP	Instruction Pointer [register] (CPU, Intel, assembler)
IP	Intellectual Property
IP	Intelligent Peripheral
IP	Intelligent Peripheral (IN)
IP	Internet Protocol [version 4] (RFC 791)
IP	intercept Point
IP16	Integer and Pointer 16 [bit] (BIT)
IPA	Information Processing promotion Agency (org., MITI, Japan)
IPA	[Fraunhofer] Institut fuer Produktionstechnik und Automation (org., Stuttgart, Germany)
IPAM	IP Address Management (IP, DNS)
IPC	Instructions Per Cycle (CPU)
IPC	Integrated Polymer Circuit (IC)
IPC	InterProcess Communications [protocol]
IPC	Internet Privacy Coalition (Internet)
IPCE	InterProcess Communication Environment
IPCP	[PPP] Internet Protocol Control Protocol (PPP, RFC 1332)
IPCR	International Conference on Pattern Recognition (conference, IAPR)
IPCS	Interactive Problem Control System
IPD	Intelligent Printer Data
IPDC	Internet Protocol Device Control (MGCP)
IPDS	IBM Personal Dictation System (IBM, voice processing)
IPDS	Intelligent Printer Data Stream (IBM, CCS)
IPDU	Internet Protocol Data Unit (PDU)
IPDVMRP	IP Distance Vector Multicast Routing Protocol (RFC 1075, IP, Multicast), "IP-DVMRP"
IPE	Integrated Programming Environment
IPES	Improved Proposed Encryption Standard (IDEA, PES, cryptography)
IPFC	Information Presentation Facility Compiler (IBM, OS/2)
IPFFS	IPod Free File Sync, "iPFFS"
IPFS	InterPlanetary File System (FS)
IPG	InterPacket Gap (IPX, IP (???))
IPG	International Programmers Guild (org.)
IPI	Intelligent Peripheral Interface [protocol]
IPI	Inter-Processor Interrupt (CPU, SMP)
IPL	IBM Public License
IPL	Initial Program Load
IPL	Ionenstrahl-ProjektionsLithographie
IPM	Impulses Per Minute
IPM	InterPersonal Messaging
IPM	Interruptions Per Minute
IPMB	Intelligent Platform Management Bus (IPMI, BMC)
IPMI	Intelligent Platform Management Interface (Intel, HP, DELL)
IPML	I pissed myself laughing
IPMS	InterPersonal Messaging System
IPN	Info Pool Network (ISP)
IPNG	Internet Protocol Next Generation (IP, RFC 1550/1752), "IPng"
IPOC	Interim Policy Oversight Committee (Internet, TLD)
IPP	Intel Primitive Performance [library] (Intel)
IPP	Internet Peering Point (Internet, IXP, ISP)
IPP	Internet Presence Provider (Internet)
IPP	Internet Printing Protocol (IBM, OS/400, RFC 2639/3196)
IPPM	Internet Protocol Performance Metrics (IP)
IPS	InPlane Switching [technology] (LCD, Sony, Philips, NEC, Iiyama, Eizo, Dell, BenQ, Apple)
IPS	Inches Per Second
IPS	Information Processing Standards
IPS	Intrusion Protection System (IDS)
IPSE	Integrated Programming Support Environment (CASE)
IPSEC	Internet Protocol SECurity (org., Internet, IETF, DES), "IPSec"
IPSJ	Information Processing Society of Japan (org., Japan)
IPSP	IP Security Policy (IP, Internet, IPSec, RFC 3586)
IPSP	Internet Protocol Security Protocol
IPTC	International Press Telecommunications Council (org.)
IPTD	[microsoft] Internet Platform and Tools Division (MS)
IPTO	Information Processing Techniques Office (ARPA)
IPTV	Internet Protocol TeleVision (IP)
IPU	ISDN-datex-P-Umsetzer
IPU	Intelligent Processing Unit
IPV6	Internet Protocol Version 6 (IP, RFC 1883/1884), IPv6
IPVR	Institut fuer Parallele und Verteilte Rechensysteme (org., Uni Stuttgart, Germany)
IPW	Incremental Packet Writing (CD-R)
IPX	Internet Packet eXchange (Novell, Netware)
IPXCP	[PPP] Internetwork Packet eXchange Control Protocol (PPP, RFC 1552)
IPXODI	IPX Open Datalink Interface (Novell, Netware)
IPXSPX	IPX / Sequenced Packet eXchange (Novell, Netware), "IPX/SPX"
IPXWAN	Internet Packet eXchange over various WAN media (Novell, IPX, WAN, RFC 1634)
IQ	intelligence quotient
IR	Information Retrieval
IR	Interface Repository (ORB)
IR	Internet Registry
IRC	InformationsRessourcen Controlling (IM)
IRC	Internet Relay Chat [protocol] (RFC 1459, Internet)
IRCOP	Internet relay chat {operator,operators}
IRCOPS	Internet relay chat operator status
IRCS	Institute for Research in Cognitive Science (org., Uni Pennsylvania, USA)
IRD	Integrated Resource Director (IBM)
IRDA	InfraRed Data Association (org., manufacturer, IRDA), "IrDA" 
IRDP	ICMP Router Discovery Protocol (ICMP, RFC 1256)
IRDS	Information Resource Dictionary System (ANSI, ISO, IM)
IRF	Integer Register File (DEC, Alpha, CPU)
IRIE	International Review of Information Ethics (ICIE)
IRIS	Incident Response Intelligence Services (IBM)
IRIS	Institute for Robotics and Intelligent Systems (org., Canada)
IRIS	Internet Registry Information Service (XML, Internet)
IRL	In Real Life (slang, Usenet, IRC)
IRL	Industrial Robot Language (HLL)
IRL	in real life
IRLAN	InfraRed Local Area Network (IRDA, LAN, TTP), "IrLAN"
IRLAP	InfraRed Link Access Protocol (IRDA, IRLAP), "IrLAP"
IRLMP	InfraRed Link Management Protocol (IRDA, IRLAP), "IrLMP"
IRLMPTP	InfraRed Link Management Protocol/Transport Protocol (IRDA, IRLMP), "IrLMP/TP"
IRLPT	InfraRed Line PrinTer (IRDA, LPT, TTP), "IrLPT"
IRM	Information Resources Management
IRMX	Intel Real time Multitasking eXecutive (OS, Intel), "iRMX"
IROBEX	InfraRed OBject EXchange protocol (IRDA, TTP), "IrOBEX"
IRP	I/O Request Packet (I/O)
IRQ	Interrupt ReQuest
IRR	Interrupt Request Register (IC)
IRRE	Inline Relational Record Editing (TYPO3)
IRRP	Inter-Domain Routing Protocol (ISO 10747)
IRSG	Internet Research Steering Group (org., Internet)
IRT	Interrupt Response Time
IRT	in real time
IRT	in regards to
IRTF	Internet Research Task Force (IAB, Internet)
IRTP	Internet Reliable Transaction Protocol (RFC 938)
IRTRANP	InfraRed TRANsfer Picture (IRDA)
IRV	International Reference Version [character set] (ISO, IS 646)
IS	Intermediate System (ATM)
IS	International Standard (ISO)
IS	International Supplement (ODT)
ISA	Industry Standard Architecture (PC)
ISA	Instruction Set Architecture (CPU)
ISA	Instrumentation, Systems, and Automation society (org.)
ISA	Integrated Systems Architecture (ESPRIT, ANSA)
ISA	Interactive Services Association (org., USA)
ISA	Internet Security and Acceleration server (MS, Firewall)
ISACA	Information Systems Audit and Control Association (org.)
ISADS	International Symposium on Autonomous Decentralized Systems (IEEE-CS, conference)
ISAGAT	Industry Standard Architecture - Guaranteed Access Time (ISA, DMA, PCI)
ISAGN	I see a great need
ISAKMP	Internet Security Association and Key Management Protocol
ISAM	Index-Sequential Access Mode (DB, SAM)
ISAPI	Internet Server Application Programmer's Interface (MS, C/S, WWW, API)
ISBN	International Standard Book Number
ISBN	International Standard Book Number
ISC	Intelligent Screen Cognition
ISC	International Supercomputer Conference
ISC	Internet Service Center (ISP)
ISC	Internet Software Consortium (org., Internet)
ISC2	International Information Systems Security Certification Consortium (org.)
ISCA	International Society for Computers and their Applications (org., AI)
ISCSI	Internet Small Computer Systems Interface (SCSI, SAN, IETF, RFC 3720/3721/3722), "iSCSI"
ISD	Integrated Sensor Device (Wacom, LCD)
ISD	Interface Summary Design
ISDBC	ISAM to SQL DataBase Connectivity (DB, ISAM, SQL)
ISDN	Integrated Services Digital Network (ITU)
ISDNUP	ISDN User Part (ISDN, GSM, mobile-systems), "ISDN-UP"
ISDV	Integrated Software Development and Verification
ISE	Instant Secure Erase (Seagate)
ISEE	Information System Engineering Environment (Westmount, CASE)
ISEE	Integrated Software Engineering Environment [reference model] (NIST, ECMA, CASE)
ISFUG	Integrated Software Federal User Group (org., user group)
ISH	Information SuperHighway
ISI	Information Sciences Institute (org., USA)
ISI	Information Society Initiative (UK)
ISI	[Fraunhofer] Institut fuer Systemtechnik und Innovationsforschung (org.)
ISIL	Internet Search Interface Language (Internet, Sherlock, Apple)
ISIS	Image and Scanner Interface Specification
ISIS	Industrial Signature Interoperability Specification (cryptography)
ISIS	Integrated Systems and Information Services (OS, Intel)
ISIS	Intermediate System to Intermediate System [protocol / routing] (OSI, RFC 1195), "IS-IS"
ISIT	[Fraunhofer] Institut fuer SiliziumTechnologie (org., Itzehoe, Germany), "ISiT"
ISKO	International Society for Knowledge Organisation (org.)
ISL	Inter-Switch Link (FC)
ISLM	Integrated Services Line Module
ISLN	Integrated Services Local Network
ISLU	Integrated Services Line Unit
ISM	Industrial, Science, Medical [ = 2,4 GHz ] (WLAN)
ISM	Intel Server Management (Intel)
ISM	InterSystems M (MUMPS, InterSytems)
ISMA	Internet Streaming Media Alliance (org., Internet, Apple, Cisco, IBM, Philips, ...)
ISML	Interface Specification Meta-Language
ISMS	Integrated Security Model for SNMP (SNMP)
ISMS	Inventory Sampling Measurememt System (CC)
ISN	Information Systems Network
ISN	Initial Segment / Sequence Number (TCP/IP)
ISN	Integrated Systems Network
ISN	Internet Shopping Network (network, WWW)
ISNS	Internet Storage Name Service (RFC 4171), "iSNS"
ISO	International Standards Organisation [International Organization for Standardization] (org.)
ISOBMFF	ISO Base Media File Format (ISO)
ISOC	Internet SOCiety (org., Internet)
ISODE	ISO Development Environment (OSI)
ISOE	ISCSI Offload Engine (ISCSI), "iSOE"
ISONET	ISO information NETwork (ISO, network)
ISP	Image Synthesis Processor (IC, graphics, TSP)
ISP	Integrated System Peripheral control (Wyse)
ISP	Interactive String Processor (BS2000)
ISP	International Standardized Profiles (ISO)
ISP	Internet Service Provider (Internet)
ISPA	ISDN PAcket [driver] (ISDN)
ISPA	Internet Service Provider Austria (org., ISP)
ISPA	Internet Services Providers' Association (org., UK)
ISPC	Internet Service Providers' Consortium (ISP, IPP, org.), "ISP/C"
ISPF	Interactive System Productivity Facility (IBM)
ISPN	International Standard Program Number
ISPO	Information Society Project Office [of the european commission] (org., Europe, ECHO)
ISPS	Instruction Set Processor Specifications (HDL)
ISQI	International Software Quality Institute (org.), "iSQI"
ISQL	Interactive Structured Query Language
ISR	Interrupt Service Register (IC)
ISR	Interrupt Service Request
ISR	Interrupt Service Routine
ISRC	International Standard Recording Code
ISS	Internet Security Systems (manufacturer)
ISSAC	International Symposium on Symbolic and Algebraic Computation (ACM, conference)
ISSCC	International Solid State Circuits Conference (Konferenz)
ISSE	Internet Streaming SIMD Extension (Intel, Pentium, Katmai, SIMD)
ISSN	Integrated Special Services Network
ISSN	International Standard Serial Number
ISSRE	International Symposium on Software Reliability Engineering (IEEE-CS, conference)
ISSS	Information Society Standardization System (CEN, org.)
ISST	[Fraunhofer] Institut fuer Software- und SystemTechnik (org., Dortmund, Germany)
IST	Immerse System Technology (VR)
IST	Indian Standard Time [+0530] (TZ)
IST	Initial System Test
IST	Intelligent Transportation System
ISTA	International Security Tuition Association (org.)
ISTM	It Seems To Me (telecommunication, Usenet, IRC)
ISTM	it seems to me
ISTO	Information Science and Technology Office (org., DARPA)
ISTQB	International Software Testing Qualification Board (iSQI)
ISTR	I Seem To Recall / Remember (telecommunication, Usenet, IRC)
ISTR	I seem to {recall,remember}
ISUP	Integrated Services User Part (ISDN)
ISV	Independent Software Vendor
ISV	Independent Solution Vendor (DEC)
ISV	Information Service Vendor
IT	Information Technology
IT	Iran Time [+0300] (TZ)
ITA	Interim Type Approval
ITAA	Information Technology Association of America (org., USA)
ITAC	Information Technology Association of Canada (org., Canada)
ITAF	International Teletext Art Festival
ITAM	Information Technology Asset Management
ITAN	Indizierte TransaktionsNummer (banking), "iTAN"
ITC	in this {channel,chat}
ITCM	Instruction Tightly Coupled Memory (IC)
ITE	InformationsTechnische Einrichtungen
ITESFA1EHS	Information Technology Enterprise Solutions - Function Area 1 - Enterprise Hardware Solutions (mil., USA), "ITES-FA1-EHS"
ITG	InformationsTechnische Gesellschaft (org., VDE)
ITIL	Information Technology Infrastructure Library (CCTA, OGC)
ITLB	Instruction Translation Look-aside Buffer (CPU)
ITM	Information Technology Management
ITMA	Information Technology Management Association (org., USA)
ITMS	ITunes Music Store (WWW), "iTMS"
ITMS	Immediate check Truth Maintenance System (AI)
ITOT	ISO Transport service on TCP/IP (ISO, TCP/IP, RFC 2126)
ITP	Intend / Intent To Package (slang, Cygwin)
ITP	Intent to Package (Linux, Debian)
ITR	International Telecommunication Regulations (ITU)
ITR	Internet Talk Radio (Internet)
ITRC	Information Technology Research Centre (org., Canada)
ITRON	Industrial TRON (TRON, OS)
ITRS	International Technology Roadmap for Semiconductors
ITS	Incompatible Time-sharing System (DEC)
ITS	International Telecommunications Society (org.)
ITSDN	Integrated Tactical/Strategic Data Network (mil., USA, network)
ITSEC	[european] Information Technology Security Evaluation Criteria (Europe)
ITSEM	Information Technology Security Evaluation Manual / Methodology (ITSEC)
ITSP	Internet Telephony Service Provider (Internet, CAT)
ITSPO	Information Technology Standards Program Office (org., USA)
ITT	International Telegraph and Telephone (org.)
ITT	in this thread
ITTI	Information Technology Training Initiative (org., UK)
ITTM	Institut Telekomunikasi dan Teknologi Maklumat (org., Malaysia)
ITU	Information Transport Utility
ITU	International Telecommunications Union (org.)
ITUR	International Telecommunications Union - Radiocommunications sector (ITU, org.), "ITU-R"
ITUSA	Information Technology Users Standards Association (org., USA)
ITUT	ITU Telecommunications [standards group] (org., successorr, CCITT), "ITU-T"
ITUTSS	International Telecommunications Union Telecommunication Standards Sector (ITU)
ITW	In The Wild [viruses]
ITX	??? Technology eXtended [form factor]
ITYM	I Think You Meant (telecommunication, Usenet, IRC)
ITYM	I think you mean
IU	Integer Unit (CPU)
IUCV	Inter-User Communications Vehicle (IBM, TCP/IP, API, VM/ESA, CP)
IUD	insert usual disclaimers
IUK	Informations- und Kommunikationstechnik, "IuK" 
IUKDG	Informations- Und KommunikationsDiensteGesetz telecommunication, Germany
IUMA	Internet Underground Music Archive (WWW)
IUP	Interim Update Package (3COM)
IUR	International User Requirements (ETSI, TS 101331)
IUSS	if you say so
IUT	Implementation Under Test
IUTSUT	Implementation Under Test - System Under Test, "IUT-SUT"
IV	InformationsVerarbeitung
IV	Initialisation Vector (cryptography)
IVA	International Voice Association (org.)
IVC	Integrated Visual Computing [architecture] (SGI)
IVDENIC	InteressenVerbund DEutsches Network Information Center (org., Internet), "IV-DENIC"
IVDLAN	Integrated Voice and Data Local Area Network
IVM	Internet Voice Messaging (Internet, RFC 4239)
IVR	Interactive Voice Response (CTI)
IVS	IBM Verkabelungs-System
IVS	Interactive Visualization Systems
IVTS	International Video Teleconferencing Service
IVW	Informationsgemeinschaft zur feststellung der Verbreitung von Werbetraegern [e. V.] (org.)
IW	it's worse
IWA	International Webmasters Association (org., WWW)
IWAM	Internet server Web Application Manager (MS, Windows, Internet)
IWBNI	it would be nice if
IWBS	Institut fuer WissensBasierte Systeme (org., IBM)
IWC	Inside Wire Cable
IWF	InterWorking Function (IN, GSM, ...)
IWFM	It Works for Me (telecommunication, Usenet, IRC)
IWOP	Ingenic Wearable Open Platform
IWS	Intelligent Work-Station
IWT	International Workshop on Telematics (conference, IEEE-CS, SEE)
IWU	InterWorking Unit (IN)
IWV	ImpulsWahlVerfahren (MODEM)
IXA	Integrated Xseries Adapter [= Integrated xSeries Adapter] (IBM)
IXC	IntereXchange Carrier (FCC, LATA)
IXI	International X.25 Infrastructure (COSINE, CORDIS)
IXP	Internet eXchange Point (Internet, IPP, ISP)
IXS	Integrated Xseries Server [= Integrated xSeries Server] (IBM)
IYD	in your dreams
IYKWIM	if you know what I mean
IYSS	if you say so
IYSWIM	If You See What I Mean (slang, Usenet, IRC)
IYSWIM	if you see what I mean
IZM	[Fraunhofer] Institut fuer Zuverlaessigkeit und Mikrointegration (org., Berlin, Germany)
J/K	just kidding
J2EE	Java 2 Enterprise Edition (Java, Sun)
J2ME	Java 2 Micro Edition (Java, Sun)
J2SE	Java 2 Standard Edition (Java, Sun)
JAAS	Java Authentication and Authorization Service (Java, API)
JACC	Java Authorization Contract for Containers (Java)
JACK	Java Application Component Kit (Java)
JACM	Journal of the Association for Computing Machinery (ACM)
JAD	Joint Application Development
JADE	Jasmine Application Development Environment (Jasmine, DB, CA)
JAE	Java Application Environment (Java, Sun, JDK)
JAIN	Java API for Integrated Networks (Java, API)
JAM	just a minute
JANET	Joint Academic NETwork (network, UK)
JAOO	Java and Object Orientation [conference]
JAP	Java Anon Proxy (Java)
JAPH	Just Another PERL Hacker (PERL)
JAR	Java ARchive (Java)
JARS	Java Applet Rating Service (Java, WWW)
JAS	just a second
JASS	Javascript-Accessable Style Sheets (HTML, WWW, JavaScript)
JASS	Jumpstart Architecture and Security Scripts (Sun, Solaris)
JAVAOS	Java Operating System (Java), "JavaOS"
JAX	Java API for XML (Java, API, XML)
JAX	[Konferenz fuer] Java, Apache, XML (conference, Java, Apache, XML)
JAXB	Java API for XML Binding (Java, API, XML)
JAXM	Java API for XML Messaging (Java, XML, API)
JAXP	Java API for XML Processing (Java, API, XML, JSR 206)
JAXR	Java API for XML Registries (Java, XML, API), "JAX-R"
JAXRPC	Java API for XML-based Remote Procedure Calls (Java, API, XML, RPC), "JAX-RPC"
JAXWS	Java API for XML-based Web Services (JAX-RPC, Java), "JAX-WS"
JB	Jelly Bean (Android, OS)
JBB	Java Business Benchmark (SPEC, Java)
JBC	J# Browser Controls (MS, .NET, Java)
JBI	Java Business Integration (Java, JSR 208)
JBIG	Joint Bi-level Image expert Group (org., JTC1)
JBOD	Just a Bunch Of Disks (HDD)
JBOF	Just a Bunch Of Flash
JCA	Java Cryptography Architecture (Java, API, cryptography)
JCALS	Joint Computer-Aided Logistics System (CAL)
JCB	Job Control Block (BS2000)
JCDW	Java Callable Data Wrapper (Java)
JCE	Java Cryptographic / Cryptography Extension (Java, JCA)
JCF	JESSI Common Framework
JCK	Java Compatibility Kit (Java, Sun)
JCL	Job Control Language (IBM, OS/360)
JCO	Java COnnector (SAP, R/3, Java, JNI)
JCP	Java Community Process (Java, Sun)
JCR	Java Content Repository (Java, API, JSR 170)
JCSS	??? (org.)
JCW	Java Callable Wrapper (MS, Java, VM, COM)
JDBC	Java standard DataBase Connectivity (DB, Java, Sun, Borland, ODBC, API)
JDK	Java Development Kit (Sun, Java)
JDO	Java Data Objects (Java, JSR 12)
JDOM	Java Document Object Model (Java)
JDS2	Java Desktop System 2 (Sun, Linux, Java)
JDT	Java Development Tooling (Java, Eclipse)
JDWP	Java Debug Wire Protocol (Java)
JECL	Jabber External Component Libraries (Jabber, API)
JED	Joomla! Extensions Directory (Joomla)
JEDEC	Joint Electronic Devices Engineering Council (org.)
JEE	Java Enterprise Edition (J2EE, Java, Sun)
JEIDA	Japan Electronics Industry Development Association (org., Japan)
JEITA	Japan Electronics and Information Technology industries Association (org. Japan)
JELD	Java Event List Daemon (Java)
JEM	Java Eclipse Modeling Framework Model (Java, EMF, Eclipse, WTP)
JEMS	Jboss Enterprise Middleware System
JES	Java Enterprise System (Sun, Java)
JES	Job Entry Subsystem (IBM)
JESS	Java Expert System Shell (Java, Shell)
JESSI	Joint European Submicron Silicon Initiative (Org, Europe)
JET	Java Emitter Templates (Java, EMF)
JET	Joint Engineering Team
JFC	Java Foundation Classes (Java, API, AWT)
JFET	Junction Field Effect Transistor (IC, FET)
JFFS	Journaling Flash File System (FS, Flash)
JFIF	JPEG File Interchange Format (JPEG)
JFK	John Fitzgerald Kennedy
JFS	Journaled File System (IBM, HP, FS)
JFS	Journalized File System
JFT	Job File Table (DOS)
JFTR	just for the record
JFYI	just for your information
JGI	just Google it
JGI	just got it
JHD	just hit delete
JIC	just in case
JICST	Japan Information Center of Science and Technology (org., Japan)
JIEO	Joint Interoperability Engineering Organization (org., DISA, mil., USA)
JIF	JPEG Interchange Format (JPEG)
JIG	Jabber Interest Group (Jabber)
JIPDEC	Japan Information Processing DEvelopment Center (org., Japan)
JIPS	JANET Internet Protocol Service (JANET)
JIS	Japanese Institute of Standards (org., Japan)
JISC	Japanese Industrial Standards Committee (org., Japan)
JIT	Just In Time [compiler]
JITC	Joint Interoperability Technology Center (org., DISA, mil.)
JJA	just joking around
JK	Just Kidding (telecommunication, Usenet, IRC)
JK	just kidding
JLCA	Java Language Conversion Assistant (MS, Java, .NET)
JM	Joint Model (AVC)
JMAPI	Java Management API (Java, API)
JMF	Java Media Format (Java)
JMI	Java Metadata Interface (Java)
JMM	Java Memory Model (Java)
JMO	just my opinion
JMS	Java Messages Service (Java, API)
JMSC	Japanese MIDI Standard Committee (org., Japan)
JMSWG	Joint Multi-TADIL Standards Working Group (org., mil., TADIL)
JMX	Java Management eXtensions (Java)
JND	Just Noticeable Difference (video)
JNDI	Java Naming and Directory Interface (JavaSoft, API, Java)
JNI	Java Native method Interface (Java, API)
JNSS	??? (org.)
JNT	Java Network Technology (Java, Informatec)
JODS	Jasmine Object Database Server (Jasmine, DB, CA)
JOHNNIAC	JOHN von Neumann Integrator and Automatic Computer
JOL	Journal of Online Law (WWW)
JOLT	Java OnLine Transactions (Java, Bea, OLTP)
JOOP	Journal of Object Orientated Programming (OOP)
JOSL	Jabber Open Source License (Jabber)
JOSS	JOHNNIAC Open Shop System (OS, JOHNNIAC)
JOSS	Joint Object Services Submission
JOTS	Joint Operational Tactical System (mil.)
JOVE	Jonathan's Own Version of EMACS (EMACS)
JOVIAL	Jules Own Version of the International Algorithmic Language
JPA	Java Persistence API (Java, API, JEE, EJB)
JPEG	Joint Photographics Expert Group (org., JTC1, RFC 1521, JPEG)
JPLDIS	Jet Propulsion Laboratory Display Information System
JPM	Java Package Manager (MS, Java, VM)
JPS	Java Print Service (Java)
JRE	Java Runtime Environment (Java)
JRMP	Java Remote Method Protocol (Java)
JRPG	Japanese Role Playing Game (RPG)
JSA	Japanese Standards Association (org., Japan)
JSA	Juristische StandardAntwort (slang, Usenet)
JSAI	Japanese Society for Artificial Intelligence (org., Japan)
JSAN	Joint Staff Automation of the Nineties (mil.)
JSD	Jackson System Development (JSP)
JSDK	Java Servlet Development Kit (Java, Sun)
JSF	JavaServer Faces (Java, J2EE)
JSME	Japan Society of Mechanical Engineering (org., Japan)
JSON	JavaScript Object Notation (JavaScript, JSON)
JSP	Jackson Structured Programming (JSD)
JSP	Java Server Pages (Java, Sun, JSP)
JSPA	Java Specification Participation Agreement (Java, JCP)
JSPE	Japan Society of Professional Engineers (org., Japan)
JSR	Java Specification Request (Java, JCP)
JSSA	Japan Society for System Audits (org., JIPDEC, Japan)
JSSE	Java Secure Socket Extension (Java, API)
JST	Japan Standard Time [+0900] (TZ)
JSTL	JSP Standard Tag Library (Java, JSP, WSDP)
JSYK	just so you know
JT	Java Time [+0730] (TZ)
JTA	Java Transaction API (Java, API)
JTA	Joint Technical Architecture (JIEO, mil.)
JTAG	Joint Test Action Group (org., IC)
JTB	Jump Trace Buffer (CPU)
JTBP	Job To Be Processed [block] (BS2000)
JTBPX	Job To Be Processed [block] eXtension (BS2000)
JTC1	Joint Technical Committee 1 (ISO, IEC, IT)
JTLYK	just to let you know
JTM	Job Transfer and Manipulation (ISO 8831/32)
JTMS	Justification based Truth Maintenance System (AI)
JTS	Java Transaction Services (Java, API)
JTSSG	Joint Telecommunications Standards Steering Group (mil.)
JTWI	Java Technology for Wireless Industry (Java, JSR-185)
JUGHEAD	Jonzy's Universal Gopher Hierarchy Excavation And Display
JUI	Joomla User Interface
JUMBO	Java Universal Molecular Browser for Objects (XML)
JUMP	JUelich MultiProcessor (IBM)
JUNET	Japan Unix NETwork (network, Unix)
JURIS	JURistisches InformationsSystem
JV	JobVariablen (BS2000)
JVC	J++ Visual Compiler (MS, Java)
JVET	Joint Video Exploration Team (org., ITU)
JVIDS	Joint Visually Integrated Display System (mil.)
JVM	Java Virtual Machine (Java)
JVMPI	Java Virtual Machine Profiling Interface (Java, JDK)
JVMTI	Java Virtual Machine Tool Interface (Java, JVM, J2SE)
JVT	Joint Video Team (ITU-T, ISO, IEC, MPEG)
JW	just wondering
JWE	JSON Web Encryption (JSON)
JWICS	Joint Worldwide Intelligence Communications System (mil.)
JWS	JSON Web Signature (JSON)
JWS	Java Web Services (Java)
JWS	Java Web Start (Java, IBM)
JWS	Javadoc extensions for Web Services (BEA, Java)
JWT	JSON Web Token (JSON)
KAISER	Kernel Address Isolation to have Side-channels Efficiently Removed
KAN	KriminalAktenNachweis (INPOL)
KARL	KAiserslautern Register transfer Language [version II/III] (HDL)
KARL	KArlsruhe Register transfer Language [version I] (HDL)
KASLR	Kernel Address Space Layout Randomization (OS)
KB	KiloByte
KBPS	KiloBits Per Second (BIT)
KBS	Knowledge-Based System
KCC	Knowledge Consistency Checker (AD)
KCCU	Keyboard Cursor Control Unit (Airbus, A380)
KCGI	Kyocera ??? (Kyocera)
KCGL	KyoCera Graphic Language (Kyocera)
KCMS	Kodak Color Management System (Kodak, DTP)
KDC	Kerberos Domain Controller (Kerberos)
KDC	Key Distribution Center (cryptography)
KDD	Kokusai Denshin Denwa (org., Japan)
KDE	K Destop Environment (Linux, KDE, GUI)
KDM	K Display Manager (KDE)
KDM	Key Delivery Message (DCI)
KDT	Keyboard Display Terminal
KERMIT	Kl-10 Error-free Reciprocal Micro Interconnect over Tty lines
KES	Key Escrow System (cryptography)
KFM	K File Manager (KDE)
KGEM	Kernel Generalized Event Management (CA, GPL, Linux)
KGRZ	Kommunales GebietsRechenzentrum Giessen (org.)
KHG	Kernel Hacking Guide (Linux)
KI	Kuenstliche Intelligenz
KIBI	KIloBInary [(2^10)^1] (IEC)
KIF	Konferenz der Informatik Fachschaften (Konferenz)
KIO	K Input / Output (KDE)
KIPI	KDE Image Plugin Interface (KDE)
KIPS	Kilo Instructions Per Second
KIR	Kyocera Image Refinement (Kyocera)
KISS	Keep It Simple, Stupid (slang, Usenet, IRC)
KISS	keep it simple, stupid
KIT	Kernel software for Intelligent Terminals (T-Online, DTAG, BTX)
KITA	kick in the ass
KK	KitKat (Android, OS)
KK	Konnectivity Koordination (DE-NIC)
KK	okay, okay
KLICK	Karlsruher LIChtleiter-Kommunikationsnetz (Uni Karlsruhe, Germany)
KLINE	kill line
KLIPS	Kernel IPSec (Linux, IPSEC)
KLIPS	Kilo Logical Inferences Per Second (AI, KI, XPS)
KLT	Karhunen Loeve Transformation
KLT	Kernel Latency Time
KM	Knowledge Management
KMA	keep me advised
KMA	keep moving ahead
KMA	kill me already
KMDF	Kernel-Mode Driver Framework (UMDF, MS, Windows, Vista)
KMDL	Knowledge Modeling and Description Language
KME	Kombinat Mikroelektronik Erfurt
KML	Keyhole Markup Language (XML, Google)
KMOS	Kernel of a Multiprocess Operating System (OS)
KMS	Key Management Server (AD)
KMS	Knowledge Management Systeme
KNF	kernel normal form
KNI	Katmai New Instructions (Intel, ISSE, predecessor)
KNN	Kuenstliche Neuronale Netze (neural nets)
KNOOM	KNowledge Orientated Office Model
KOLIBRI	KOpal LIBrary for Retrieval and Ingest (KOPAL), "koLibRi"
KOPAL	KoOPerativer Aufbau eines Langzeitarchivs
KORE	???
KOS	Kent On-Line System (OS)
KOS	kill on sight
KPCMS	Kodak Precision Color Management System (Kodak, DTP)
KPDL	Kyocera Page Description Language (Kyocera)
KPI	Kernel Programming Interface (Unix, API)
KPM	Kyocera PrintMonitor (Kyocera)
KPOP	Kerberized Post Office Protocol (POP3)
KPT	Kai's PowerTools (DTP)
KPTI	Kernel Page-Table Isolation (OS)
KQML	Knowledge Query Manipulation Language (AI)
KR	Knowledge Representation (AI)
KR	[brian] Kernighan & [dennis] Ritchie [c standard], "K&R"
KRA	Key Recovery Alliance (org., cryptography)
KRACK	Key Installation AttaCK (WPA, WLAN)
KSA	Kalman Saffran Associates (manufacturer)
KSA	KommunikationsStrukturAnalyse (OA, TUB)
KSDS	Key Sequenced Data Set (VSAM)
KSH	Key Strokes per Hour
KSH	Korn SHell (Unix, Shell)
KSIG	Khronos Special Interest Group
KSK	Key Signing Key (ZSK)
KSLNRC	Knowledge Systems Laboratory of the National Research Council (org., Canada, AI)
KSN	Kaspersky Security Network
KSOS	Kernelized Secure Operating System (OS)
KSPM	KeyStrokes Per Minute
KSR	Keyboard Send Receive
KSS	Kilo-Samples per Second
KTHX	okay, thanks
KTHXBAI	okay, thanks. Goodbye.
KUTGW	Keep Up The Good Work (slang, Usenet, IRC)
KV	KabelVerzweiger
KV	Karnaugh Veitch diagram
KVA	Kernel Virtual Address [space]
KVM	Kernel-based Virtual Machine (Linux, VM)
KVM	Keyboard, Video, Mouse
KVM	Kilobyte Virtual Machine (Java, Sun, MIDP)
KWIM	know what I mean?
KWM	K Window Manager (KDE)
L1	Level 1 [cache]
L2	Level 2 [cache]
L2F	Layer 2 Forwarding [protocol] (Shiva, Cisco, IP, IPX, LLC)
L2TP	Layer 2 Tunneling Protocol (PPP, VPN, IP, RFC 2661)
L3VPN	Layer 3 Virtual Private Network (VPN)
L8	late
L8R	later
LA	Limited Availability (IBM, OS/2)
LA	Location Area (MSC, GSM, mobile-systems)
LA	[MPEG] Licensing Administration (MPEG)
LAA	License Assisted Access (LTE)
LAC	Location Area Code (mobile-systems)
LAC	Lotus Authorized Consultants (Lotus)
LACNIC	Latin American and Caribbean Internet Addresses Registry (org., Internet)
LACP	Link Aggregation Control Protocol (IEEE 802.3ad, IEEE 802.1ax)
LADSPA	Linux Audio Developer's Simple Plug-in API (Linux, API)
LADT	Lexikon der Abkuerzungen in der Datentechnik und Telekommunikation (WWW)
LADT	Local Access Data Transport
LAEC	Lotus Authorized Education Center (Lotus)
LAG	Logical Address Group (ION)
LAM	Local Area Multicomputer (Parallel Computing)
LAME	LAME Ain't an MP3 Encoder (MP3)
LAMP	Linux, Apache, MySQL, PHP (Linux, Apache, PHP, DB, SQL)
LAMPP	Linux, Apache, MySQL, PHP and PERL (Linux, Apache, DB, SQL, PHP, PERL)
LAN	Local Area Network (LAN)
LANANA	Linux Assigned Names And Numbers Authority (Linux, org.)
LANCE	LAN Controller for Ethernet (LAN)
LANE	Local Area Network Emulation [over ATM specification] (ATM)
LANL	Los Alamos National Laboratory (org., USA)
LAP	LAN Access Profile (Bluetooth, SPP, LAN)
LAP	Link Access Procedure / Protocol (CCITT, X.25)
LAPACK	Linear Algebra PACKage (FORTRAN)
LAPB	Link Access Procedure - Balanced (CCITT, LAP, X.25)
LAPD	Link Access Procedure on the D channel (X.21, ISDN, TA)
LAPIC	Local Advanced Programmable Interrupt Controller (PIC)
LAPM	Link Access Procedure for Modem
LAPP	Linux, Apache, PostgreSQL, PHP (Linux, Apache, PHP, DB, SQL)
LAPS	LAN Adapter and Protocol Support
LART	luser attitude readjustment tool
LASER	Light Amplification by Stimulated Emission of Radiation
LASS	Local Area Signaling Service
LAT	Local Area Transport (DEC)
LATA	Local Access Transport Area
LATM	Local Asynchronous Transfer Mode
LAVAS	LAger- und VersandAbwicklungsSystem (MBAG)
LAVC	Local Area VAX Cluster (VAX, DEC)
LAW	Local Authority Workstation
LAWN	Local Area Wireless Network
LBA	Logical Block Addressing (EIDE)
LBAC	Label Based Access Control (DB2, Informix, DB)
LBCAST	Lateral Buried Charge Accumulator and Sensing Transistor array (Nikon, photo)
LBM	Local Bus Master
LBN	Logical Block Number (LBA)
LBNL	last but not least
LBR	Last Branch Recording (Intel, CPU, IC)
LBS	Location Based Service (mobile-systems)
LBT	Listen Before Talk (telecommunication), ieeesa
LBT	Local Bus Targets
LBX	Low-Band with X
LC	Linux Computer (Corel)
LC	Loopback Capability (UNI, ATM, OAM)
LCA	Logic Cell Array
LCA	[Sair] Linux [and GNU] Certified Administrator (Linux, GNU, Unix)
LCC	Local Control Center
LCCM	LAN Client Control Manager (IBM, LAN)
LCD	LISP Code Directory (EMACS)
LCD	Liquid-Crystal Display (LCD)
LCD	Loss of Cell Delineation (UNI, ATM)
LCF	Logic of Computable Functions
LCG	LHC Computing Grid [old term] (WLCG, CERN)
LCGI	Local Common Graphics Interface (CGI, WWW)
LCM	LEAF Creation Method (EES, cryptography)
LCN	Local Control Network (Issendorf)
LCN	Logical Channel Numbers
LCOS	Liquid Crystal On Silicon (LCD), "LCoS"
LCP	[PPP] Link Control Protocol (PPP, RFC 1570)
LCP	[Sair] Linux [and GNU] Certified Professional (Linux, GNU, Unix)
LCR	Least Cost Routing
LCS	Laboratory for Computer Science (MIT)
LCS	Linux Compatibility Standard (Linux)
LCS	Liquid Crystal Shutter
LCS	Lotus Communication Server
LCSS	Liquid Crystal Stereoscopic Shutter [display]
LCT	Last Compliance Time (GCRA)
LCU	LAN CID Utility (LAN, CID, IBM)
LCV	Line Coding Violation [error event] (DS1/E1, DS3/E3)
LD	LAN Destination (ATM)
LDA	Local Delivery Agent
LDAP	Lightweight Directory Access Protocol (RFC 1777, X.500, DS, AD, CORBA)
LDAPAPI	Lightweight Directory Access Protocol Application Program Interface (LDAP, RFC 1823, API), "LDAP API"
LDCM	LANDesk Client Manager
LDD	Lightly Doped Drain (IC, MOSFET)
LDDM	Longhorn Display Driver Model (MS, Windows, Vista)
LDID	Logical Disk IDentifier (MS)
LDP	Label Distribution Protocol (IETF, RFC 3036, MPLS)
LDP	Linux Documentation Project (Linux)
LDP	Loader Debugger Protocol (RFC 909)
LDPC	Low Density Parity Check Codes (WIMAX, 802.16e)
LDR	Light Detect Resistor
LDS		Lightweight Directory Services (AD, MS)
LDT	Lightning Data Transfer [bus] (AMD)
LDT	Local Descriptor Table (CPU, Intel)
LDTR	Load Descriptor Table Register (CPU, Intel, assembler, IC)
LDTRC	Local Descriptor Table Register Cache (LDT, Intel, CPU)
LDVA	LaenderDatenVerareitungsAnlage
LDW	Lane Departure Warning (car)
LE	LAN Emulation (LANE, ATM)
LEA	Law Enforcement Agency (ETSI, ETSI 201 671)
LEAF	Law Enforcement Access Field (EES, cryptography)
LEAP	Lightweight Extensible Authentication Protocol (Cisco, EAP, cryptography, WLAN)
LEARP	LAN Emulation Address Resolution Protocol (LANE, ARP, ATM), "LE-ARP"
LEAS	LATA Equal Access System
LEC	LAN Emulation Client (LANE, ATM)
LEC	Layered Error Correction (CD)
LEC	Local Exchange Carrier (FCC, LATA, IEC)
LECID	LAN Emulation Client IDentifier (LANE, ATM, LEC)
LECS	Local area network Emulation Configuration Server (ATM, LANE, LEC)
LED	Light-Emitting Diode
LEDBAT	Low Extra Delay BAckground Transport
LEI	Lotus Enterprise Integrator (Lotus)
LEL	Link, Embed and Launch (UNIX)
LELA	Linksys EasyLink Advisor
LELR	Low Energy Low Range (Bluetooth)
LEMP	Lightning ElectroMagnetic Pulse
LEN	Loi pour la confiance dans l'Economie Numerique (France)
LEN	Low Entry Networking (IBM, SNA, PU)
LENS	Laser Engineered Net-Shaping
LEO	LeitungsEndgeraet, Optisch Mil., Germany
LEO	Link Everything Online (WWW, TUM)
LER	Last Exception Record (MSR, Intel, CPU)
LES	LAN Emulation Server (LANE, ATM)
LES	Line Errored Seconds (DS1/E1, DS3/E3)
LF	Line Feed (ASCII)
LF	Login Facility (DCE)
LFA	Leitzentrum Fuer Anwendungsforschung (GDR), "LfA"
LFA	Link Field Address (Forth)
LFA	Local Feature Analysis
LFAP	Light-weight Flow Admission Protocol (Cabletron, RFC 2124)
LFB	Linear Frame Buffer (CPU, VESA)
LFCC	Linux Federation for Commercial Customers (Linux)
LFE	Low Frequency Effect (audio)
LFG	Looking For Group (MMORPG, slang, GLF)
LFN	Long File Names
LFNBK	Long File Name BacKup (MS)
LFO	Low Frequency Oscillator
LFS	Linux From Scratch (Linux, org.)
LFS	Log-Structured File System (FS)
LFS	Loopback File System
LFSR	Linear Feedback Shift Register (IC)
LFT	Layer Four Traceroute (IP, TCP, UDP)
LFU	Least Frequently Used
LG	Liebe Gruesse (slang, Usenet, IRC)
LGMR	Laser Guided Magnetic Recording
LGPL	Lesser General Public License (GPL, GNU)
LGPO	Local Group Policy Object (AD, GPO)
LGTM	looks good to me
LGX	Linux/GNU/X [distribution] (Yggdrasil, Linux, GNU)
LHS	Left Hand Side (NGSCB, MS, Palladium)
LI	Lawful Interception (ETSI)
LIB	Linear Incremental Backoff (CSMA/CD, BEB)
LIC	Licensed Internal Code
LICCC	Licensed Internal Code Configuration Control (IBM)
LID	Local IDentifier (Infiniband)
LIDO	LInux cluster DOrtmund, "LiDO"
LIF	Low Insertion Force (IC)
LIFD	Last In First Drop
LIFE	Laboratory for International Fuzzy Engineering [research] (MITI)
LIFE	Logistics Interface For manufacturing Environment
LIFI	Light Fidelity (OWC), "Li-Fi"
LIFO	Last In First Out
LIJP	Leaf Initiated Join Parameter
LIKS	Lietuvos kompiuterininko Sajunga (org., Litauen)
LILO	LInux [boot] LOader (Linux)
LIM	Lotus - Intel - Microsoft (manufacturer)
LIMAD	Linear MAgnetic Drive [technology]
LIMDOW	Laser / Light Intensity Modulation, Direct OverWrite (MOD)
LIMEMS	Lotus - Intel - Microsoft Expanded Memory Specification (Lotus, Intel, MS, EMS), "LIM EMS"
LIMS	Lawful Interception Management System (Utimaco)
LIN	Local Interconnect Network [bus]
LINC	Laboratory INstrument Computer
LINCAT	LINux Compatibility Assurance Toolkit (Linux, Sun, Solaris)
LINQ	Language INtegrated Query (MS, VB, C#)
LIP	Language Interface Pack (MS, Windows)
LIP	Large Internet Packet
LIP	Loop Initialization Primitive (SCSI)
LIPKEY	Low Infrastructure Public KEY [meachanism]
LIPS	Logical Inferences Per Second (AI, KI, XPS)
LIR	Link Incident Report (Cisco)
LIR	Local Internet Registry (Internet)
LIRC	Linux Infrared Remote Control (Linux)
LIS	Logical IP Subnet (RFC 1577, ION)
LISA	Linux Installation & System Administration (Linux, LST)
LISA	Localization Industry Standards Association (org.)
LISP	LISt Processor (LISP)
LISP	Lots of Isolated Silly Parentheses (LISP, slang)
LISUAF	[thueringer] LandesInformationsSystem Umwelt, Agrar und Forst (UIS), "LIS-UAF"
LITA	Library and Information Technology Association (org., USA)
LITTA	Latvijas Informacijas Tehnologiju un Telekomunikaciju Asociacija (org., Lettland)
LIU	Line Interface Unit
LIV	Link Integrity Verification
LIVE	LInux VErband (Linux, org.)
LIVID	Language Identification and Voice IDentification
LIW	Long Instruction Word (CPU)
LJBF	let's just be friends
LKDDB	Linux Kernel Driver DataBase (Linux), "LKDDb"
LKI	Labor fuer Kuenstliche Intelligenz (org., KI, Hamburg, Germany)
LLAP	Localtalk Link Access Protocol (AppleTalk, LAP)
LLATMI	Lower Layer ATM Interface (ATM)
LLB	Local Location Broker (NCS)
LLC	Logical Link Control (IEEE 802.2, ISO, OSI)
LLCSNAP	Logical Link Control/SubNetwork Access Protocol (LLC, SNAP), "LLC/SNAP"
LLE	Low Latency Ethernet (DCE)
LLMNR	Link-Local Multicast Name Resolution (IP, TCP, UDP)
LLN	Line Link Network
LLNL	Lawrence Livermore National Laboratory (org., USA)
LLP	Link Level Protocol (BTX)
LLP64	Long [32 bit], Long [32 bit], Pointer 64 [bit] (BIT)
LLVM	Low Level Virtual Machine [old term] (GCC)
LMAO	Laughing My Ass Off (slang, Usenet, IRC)
LMAO	laughing my ass off
LMC	let me check
LMDE	Linux Mint Debian Edition
LMDS	Local Multi-point Distribution System
LME	Large Memory Enabled [devices and drivers] (DAC)
LME	Layer Management Entity (OSI)
LMFAO	Laughing My Fucking Ass Off (Usenet, IRC, slang)
LMGTFY	let me google that for you
LMHO	laughing my head off
LMI	Layer Management Interface (ATM)
LMK	let me know
LMML	Learning Material Markup Language
LMNO	laughing my nuts off
LMQ	Load Miss Queue (Power4, IBM, CPU)
LMS	Library Maintenance System (BS2000)
LMSO	laughing my socks off
LMU	LAN Manager for Unix (Unix), "LM/U" 
LMX	LAN Manager for uniX (LAN, Unix, MS), "LM/X"
LNA	Low Noise Amplifier (GPS)
LNB	Line Number Block
LNN	Lotus Notes Network (Lotus)
LOC	LAN Operations Center (LAN)
LOC	Lines Of Code
LOC	Loss of Cell delineation (UNI, ATM)
LOCIS	Library Of Congress Information System (Internet)
LOCT	Layered Open Crypto Toolkit (RSA, cryptography)
LOD	Level Of Detail (3D)
LOF	Loss of Frame (UNI, ATM, DS3/E3)
LOIC	low orbit ion cannon
LOL	Laughing Out Loud (slang, Usenet, IRC)
LOL	laughing out loud
LOLITA	Language for the On-Line Investigation and Transformation of Abstractions
LOM	LAN On Motherboard (LAN)
LOM	Laminated Object Manufacturing
LON	Local Operation Network
LOOPS	LISP Object Oriented Programming System (Xerox, OOP, LISP)
LOP	Language Orientated Programming
LOP	Loss of Pointer (UNI)
LOPEC	Large-area, Organic & Printed Electronics Convention, "LOPE-C"
LORAWAN	Longe Range Wide Area Network (WAN, LP-WAN, IoT), "LoRaWAN"
LOS	Line Of Sight (WIMAX, NLOS)
LOS	Local Operating System
LOS	Loss of Signal (UNI, ATM)
LOSP	LOw SPeed channel connector (Cray, I/O)
LOV	List Of Values (DB, Oracle, Java)
LOVIS	LagerOrtVerwaltungs- und InformationsSystem (MBAG)
LP	Language Pack (MS, Windows)
LP	Line Printer (Unix)
LP	Linear Programming
LP	Logical Partition (LVM)
LP	long playing [record]
LP32	Long and Pointer 32 [bit] (BIT)
LPAE	Large Physical Address Extension
LPAM	Low Power Active Mode (Fujitsu)
LPAN	Logical Processing Area Network
LPAR	[conference on] Logic for Programming, Artificial intelligence and Reasoning (AI, conference)
LPB	[S3] Local Peripheral Bus
LPC	Linear Predictive Coding (voice processing)
LPC	Low Pin Count [interface] (ICH)
LPD	Line Printer DAEMON
LPDA	Link Problem Determination Aid
LPDP	Line Printer DAEMON Protocol (RFC 1179)
LPDU	Link Protocol Data Unit
LPEX	Live Parsing eXtensible Editor (IBM, OS/2)
LPF	League for Programming Freedom (org.)
LPI	Lines Per Inch
LPI	Linux Professional Institute (Linux, org.)
LPP	Licensed Program Product (IBM)
LPPB	Land Pre Pit level Before [recording] (DVD-R)
LPPL	Latex Project Public License
LPR	Line Printer Remote / Request (printing)
LPR	Low Priority Request (VUMA)
LPS	Lines Per Second
LPS	Lotus Professional Services (Lotus)
LPT	Line PrinTer
LPWAN	Low Power Wide Area Network (IoT, WAN), "LP-WAN"
LPX	Lean Packet eXchange (Ximeta, IDE, LAN)
LPX	Low Profile eXtended [motherboard/form factor]
LQ	Letter Quality
LQM	Link Quality Monitoring (PPP)
LR	Location Register (LA, GSM, mobile-systems)
LRBNI	Larrabee New Instructions (Intel)
LRC	Longitudinal Redundancy Check
LRDIMM	Load-Reduced-DIMM (DIMM, IC), "LR-DIMM"
LRH	Local Route Header (Infiniband)
LRPC	Lightweight Remote Procedure Calls (OLE)
LRQ	Load Reorder Queue (Power4, IBM, CPU)
LRS	Line Repeater Station
LRU	Least Recently Used
LRZ	Leibniz RechenZentrum (org., BADW)
LS	LAN Server (IBM)
LSA	Link State Advertisement (OSPF)
LSA	Local Security Authority (Samba)
LSA	Lotus Solution Architecture (Lotus)
LSAPI	Licensed Services Application Program Interface (MS, API)
LSASS	Local Security Authority Subsystem Service (MS, Windows)
LSB	Least Significant Bit (BIT)
LSB	Linux Standard Base (Linux, FSG)
LSD	Loop Stream Detector (IDQ, Intel, CPU)
LSDU	Link Service Data Unit
LSE	Linux Scalability Effort (Linux)
LSE	Local Subscriber Environment
LSF	Load Sharing Facility
LSI	Large Scale Integration
LSI	Latent Semantic Indexing
LSL	Link Support Layer (ODI)
LSM	Linux Security Modules (Linux)
LSM	Linux Software Map (Linux)
LSN	Logical Sector Numbers (OS-9)
LSO	Linux Standards Organization (org., Linux)
LSP	Label Switched Path
LSP	Layered Service Provider (MS, Windows, TCP, UDP, NetBIOS)
LSPP	Labeled Security Protection Profile (CC, SELinux)
LSR	Leaf Setup Request
LST	Linux Support Team [distribution] (Linux)
LSTM	Long-Short-Term-Memory
LSU	LAN Service Unit (LAN)
LSU	Load/Store Unit (Power4, IBM, CPU)
LT	Lagrande Technology (Intel, Pentium, CPU)
LT	Line Termination (ADSL)
LT	Logical Terminal (IBM)
LT	Lower Tester (ISO 9646-1)
LTC	Line Termination Coordinator
LTC	Linux Technology Center (Linux, Unix, IBM)
LTC	Longitudinal Time Code (video)
LTE	Line Terminating Equipment (SONET)
LTE	Long Term Evolution (mobile-systems)
LTEA	Long Term Evolution Advanced (LTE, mobile-systems), "LTE-A"
LTEAP	Long Term Evolution Advanced Pro (LTE, mobile-systems), "LTE-AP"
LTERM	Logical TERMinal (IBM), "LTerm"
LTEU	LTE Unlicensed (LTE), "LTE-U"
LTID	Logical Terminal IDentifier (IBM)
LTNS	long time no see
LTO	Linear Tape Open (Streamer, IBM, HP, Seagate)
LTO	Link Time Optimization
LTPS	Low Temperature PolySilicon (LCD)
LTPSTFT	Low Temperature PolySilicon Thin Film Transistor (TFT, LCD)
LTS	Long Time Support
LTSB	Long Term Service Branch (MS, Windows)
LTSC	Long-Term Servicing Channel (MS, Windows)
LTSS	Lawrence TimeSharing System (OS, LLNL)
LU	Logical Unit (NAU)
LU62	Logical Unit 6.2 (IBM), "LU6.2"
LUA	Least-priviledged User Account [old term] (MS, Windows, Vista, UAP)
LUG	Local Users Group
LUN	Logical Unit Number (SCSI)
LUNA	Leuchtendatei fuer UnfallfluchtNAchforschungen (INPOL)
LUNI	LANE User Network Interface (LANE, ATM)
LUP	Language UPgrade (MS)
LUT	Look-Up Table (RAMDAC, FPGA, RL)
LV	Logical Volume (LVM)
LV	Low Voltage
LVD	Low Voltage Differential [technology] (SCSI, Symbois Logic)
LVDS	Low Voltage Differential Signal (TI, NSC)
LVE	Live Video Extension (video)
LVI	Load Value Injection (CPU)
LVM	Logical Volume Manager (AIX, HP/UX, OSF/1, HDD)
LVN	LandesVerwaltungsNetz (Baden-Wuerttemberg)
LVS	Layout Versus Schematic [check] (DRC, IC)
LVTI	Local Variable Type Inference
LVTTL	Low Voltage Transistor Transistor Level (IC)
LW	Living Worlds (VRML)
LWA	LTE Wi-Fi Aggregation (LTE, WLAN)
LWC	Last Working Configuration (ESCD, PNP, BIOS)
LWE	LinuxWorld Conference & Expo (Linux, Europe)
LWL	LichtWellenLeiter (cable)
LWP	Library for WWW in PERL (PERL, WWW)
LWP	Light Weight Process (Sun, OS)
LWYL	laugh with you later
LX	Linear eXecutable (OS/2)
LZS	Lempel-Ziv-Stac [compression]
LZSDCP	[PPP] Lempel-Ziv-Stac - Data Compression Protocol (PPP, RFC 1967), "LZS-DCP"
LZW	Lempel-Ziv-Welch [compression]
M2C	Model To Code (M2M, MDSD)
M2M	Machine To Machine [protocol]
M2M	Model To Model (M2C, MDSD)
M8	mate
MAC	Mandatory Access Control (MLS, DAC)
MAC	Media Access Control (ISO, OSI, LAN, , WLAN, ...)
MAC	Membership Advisory Committee (ICANN)
MAC	Message Authentication Code (SSL, SRT, cryptography)
MACH	Multilayer ACtuator Head
MACID	Media Access Control IDentifier, "MAC-ID"
MACOS	MACintosh Operating System (Apple, OS), "MacOS"
MACS	MODEM Access Control System (MODEM, DES, cryptography), "M.A.C.S."
MACS	Manufacturing Application Control System (SNI)
MACSBUG	Motorola Advanced Computer Symbolic deBUGger (Motorola)
MAD	Memory Address Driver strength (BIOS)
MAD	Message Address Directory
MAD	Militaerischer AbschirmDienst (mil., org.)
MAD	mutually assured destruction
MADCAP	Multicast Address Dynamic Client Allocation Protocol (RFC 2730, Multicast)
MADE	Multimedia Application Development Environment (CWI)
MADK	Microsoft Activex Development Kit (ActiveX, MS)
MADT	Multiple APIC Description Table (ACPI, APIC)
MAE	Macintosh Application Environment (Apple, Sun, HPUX)
MAE	Metropolitan Area Exchange (Internet)
MAEC	Malware Attribute Enumeration and Characterization
MAINSAIL	MAchine INdependent SAIL (SAIL)
MAJC	Microprocessor Architecture for Java Computing [pronounced 'magic'] (Sun, Java)
MAJOUR	Modular Application for JOURnals (EWS, SGML)
MAM	Multi Access Module
MAME	Multiple Arcade Machine Emulator, "M.A.M.E."
MAMP	Mac, Apache, MySQL, PHP (Mac, Apache, PHP, DB, SQL)
MAN	Metropolitan Area Network
MANET	Mobile Ad-hoc NETwork (Internet)
MAP	Maintenance Analysis Procedure (IBM)
MAP	Manufacturing Automation Protocol (General Motors)
MAP	Microsoft Academic Program (MS)
MAP	Mobile Application Part (MSC, GSM, mobile-systems, SS7)
MAP27	Mobile Access Protocol [for MPT 1327] (MPT 1327), "MAP 27"
MAPASE	Mobile Application Part - Application Service Elements (MAP, MSC, GSM, mobile-systems), "MAP-ASE"
MAPEC	Multimedia APplications in Education Conference, "MApEC"
MAPI	Messaging Application Program Interface (MS, WOSA, API)
MAPOS	Multiple Access Protocol over SONET/SDH (SONET, SDH, RFC 2171)
MAPP	Mac, Apache, PostgreSQL, PHP (Mac, Apache, PHP, DB, SQL)
MAPP	Microsoft Active Protections Program (MS)
MAPS	Microsoft Active Protection System (MS, MSE)
MAPS	Multiple Airflow Pass-through Structure (Scythe), M.A.P.S.
MAPTOP	Manufacturing Automation Protocol/Technical Office Protocol, "MAP/TOP" 
MAR	Microprogram Address Register (IC)
MAR	Microsoft Authorized Refurbisher [program] (MS)
MARC	MAchine Readable Cataloging [record]
MARID	MTA Authorization Records in DNS (MTA, DNS, SPAM, IETF, WG)
MAS	Multi Agent Systems (AI)
MAS90	Mittelstands-Anwendungs-System 90 (IBM)
MASC	Multicast Address-Set Claim [protocol] (RFC 2909, Multicast)
MASCAT	MicroArchitectural Side-Channel Attack
MASE	Message Administration Service Element
MASM	Microsoft ASseMbler (MS, assembler)
MASS	Message Authentication Signature Standards (MTA, SPAM, WG)
MAT	[Dolby] Metadata-enhanced Audio Transmission
MAU	Medium Access Unit
MAU	Medium Attachment Unit (IEEE 802.3, Transceiver)
MAU	Multistation Access Unit (Token Ring, Hub)
MAUS	Muensters Apple User Service (BBS, network), "M.A.U.S."
MAW	Microsoft At Work
MAWI	MAterialWIrtschaft
MAX	MAssively parallel uniX (Cray, OS, MIMD, MPP, Unix)
MAX	Media Access Exchange (Ascend)
MAX	Multimodaler AssemblierungseXperte (VR, Uni Bielefield)
MB	MailBox
MB	MegaByte
MBA	Memory Bus Adapter
MBA	Mobile Bitstream Access (mobile-systems)
MBA	master of business administration
MBAAS	Mobile Backend As A Service (BAAS)
MBAG	Mercedes-Benz AktienGesellschaft (user)
MBB	Mobile BroadBand (3GPP)
MBC	Multi Bit Cell (IC, PCMCIA, Flash, AMD, BIT)
MBCMS	Mercedes-Benz-Computer-Mikrofilm-System (MBAG), "MB-CMS"
MBE	Molecular Beam Epitaxy (IC; MOSFET)
MBIT	Mega Binary digIT (BIT), "MBit"
MBM	Media Bandwidth Management (DSL, Zyxel)
MBOA	MultiBand OFDM Alliance (org., OFDM)
MBPS	MegaBits Per Second (BIT)
MBR	Master Boot Record
MBS	Maximum Burst Size
MBSA	Microsoft Baseline Security Analyzer (MS, Windows)
MBSA	Microsoft Business and Services Agreement (MS)
MBUS	Module BUS [standard] (Sun, SPARC), "MBus"
MC2UC	MultiCast 2 UniCast (WLAN)
MCA	Micro Channel Architecture (IBM, PS/2)
MCA	Mission Critical Applications
MCA	Model Centric Architecture (Skynamics)
MCAD	Mechanical CAD (carCAD, CAD)
MCAV	Modified Constant Angular Velocity
MCB	Memory Control Block (DOS, TPA)
MCBF	Mean Cycle Between Failure
MCC	Manchester Code Converter
MCC	Manchester Computing Centre (Linux)
MCC	Mitteldeutsches Communication Center (Leipzig)
MCC	Mobile Country Code (mobile-systems)
MCC	Monitor and Control Center (Bundeswehr)
MCC	Multichannel Communication Controller (SCC, FCC)
MCD	Mini Client Driver (MS, Windows NT)
MCD	Multimedia Cartridge Drive (Nomai)
MCE	Machine Check Exception (Intel, CPU)
MCE	Media Center Edition (MS, Windows, XP, OEM)
MCEB	Military Communications-Electronics Board (org., mil., USA)
MCERT	Mittelstand Computer Emergency Response Team Germany
MCF	MOM Connector Framework (MS, MOM)
MCF	Meta Content Framework / Format (Apple, WWW)
MCGA	Multi Color Graphics Adapter (IBM, PS/2)
MCH	Memory Controller Hub [aka Northbridge] (Intel)
MCI	Measurement Layer Interface (UMA)
MCI	Media Control Interface
MCI	Microwave Communications Incorporated
MCL	Media Communication Lab (org., Uni Boston, USA)
MCM	Multi Carrier Modulation
MCM	MultiChip Module (CPU)
MCN	Metropolitan Campus Network
MCNE	Master Certified Netware Engineer (Novell, Netware)
MCNS	Multimedia Cable Network System (org.)
MCP	Master Control Program (OS)
MCP	Media and Communications Processor (IC)
MCP	Merlin Convenience Pack (IDB, OS/2)
MCP	Multiple-Chip Product (Intel)
MCP	Multiport / Multiprotocol Communication Processor
MCPAS	Master Control Program/Advanced System, "MCP/AS" 
MCPC	Multi Channel Per Carrier
MCPS	Microsoft Certified Product Specialist (MS, ATEC)
MCR	Minimum Cell Rate (UNI, ATM, PCR, ABR)
MCS	Material Control System
MCS	Message Conversion System
MCS	Modulation and Coding Scheme (EGPRS, mobile-systems)
MCS	Multi-Category Security (SELinux)
MCS	MultiCast Server
MCS	Multichannel Communications System (Mac)
MCS	Multivender Customer Services (DEC)
MCSD	Microsoft Certified Solution Developer (MS, ATEC)
MCSE	Microsoft Certified System Engineer (MS, ATEC)
MCSMP	Message Conversion System Message Processor (MCS)
MCSS	Mitac Computer Security System (Mitac)
MCT	Media Creation Tool (MS, Windows)
MCT	Microsoft Certified Trainer (MS, ATEC)
MCTD	Mean Cell Transfer Delay (UNI, ATM)
MCTS	Multiple Console Time Sharing System (OS, CAD)
MCU	Management & Cascade Unit (Hub)
MCU	Master Control Unit (Nokia, OS)
MCU	Micro Controller Unit (SIA, RL)
MCU	Mirco Code Update
MCU	Multipoint Controller Unit (VoiP)
MCVA	Modified Constant Angular Velocity (Optical Disk)
MD	Make Directory (DOS, OS/2)
MD	Management Domain
MD	Mini Disk (Sony)
MD2	Message Digest [algorithm] 2 (RFC 1115/1319)
MD4	Message Digest [algorithm] 4 (RFC 1320)
MD5	Message Digest [algorithm] 5 (RFC 1321)
MDA	Mail Delivery Agent
MDA	Medicated Digest Authentication (HTTP)
MDA	Mobile Digital Assistant (T-Mobile, PDA)
MDA	Model Driven Architecture (CASE, OMG)
MDA	Monochrome Display Adapter [720x350] (IBM, PC)
MDAC	Microsoft Data Access Components (MS)
MDBMS	Multidimensional DataBase Management System (DBMS, DB)
MDBS	Micro Data Base System (DB)
MDC	Message conversion system Directory Component (MCS)
MDC	Meta Data Coalition
MDC	Mozilla Developer Center
MDCT	Modified Discrete Cosine Transformation
MDD	Model Driven Design (MDS)
MDDB	MultiDimensional DataBase (DB)
MDE	Mobile DatenErfassung, "mDE"
MDEF	Menu DEfinition Functions (Apple, CDEF)
MDI	Medium Dependent Interface (ethernet)
MDI	Mobile Data Initiative (org., GSM, mobile-systems)
MDI	Multiple Document Interface (MS, Windows)
MDI	Multiplex Device Interface
MDIS	MetaData Interchange Specification
MDIX	Medium Dependent Interface - crossed (MDI), "MDI-X"
MDK	MODEM Developers Kit (MODEM, MS)
MDL	Microstation Development Language (CAD)
MDM	Master Data Management
MDM	MicroDiskModule
MDM	Mobile Device Management (CA, Unicenter, MS)
MDN	Mozilla Developer Network
MDNS	Multicast - Domain Name System (DNS), "mDNS"
MDOP	Microsoft Desktop Optimization Pack (MS, Windows)
MDRAM	Multibank Dynamic Random Access Memory (RAM, DRAM, IC)
MDRC	Manufacturing Design Rule Checker
MDS	Manufacturing Design System
MDS	Microsoft Deployment Solution (MS, Windows, Vista)
MDSD	Model Driven Software Development
MDSE	Message Delivery Service Element
MDSP	Mobile Device Sync Protocol (Lotus)
MDT	Mechanical DeskTop (SGI)
MDT	Message Distribution Terminal
MDT	Microsoft Deployment Toolkit (MS)
MDT	Mittlere DatenTechnik
MDT	Mountain Daylight Time [-0600] (TZ, MST, USA)
ME	Management Engine (Intel, AMT, BIOS, UEFI)
ME	Mapping Entity
ME	Millennium Edition (MS, Windows)
MEBI	MEgaBInary [(2^10)^2] (IEC)
MEC	Memory Expansion Card
MEC	Microsoft Exchange Conference (MS)
MEF	Managed Extensibility Framework (MS)
MEG	Mega Evil Grin (slang, Usenet, IRC)
MEGA	MessdatenErfassung und Graphische Auswertung
MEI	Matsushita Electronics Incorporated (manufacturer, Japan)
MEL	Maya Embedded Language (Maya)
MEMS	Micro-ElectroMechanical System
MERS	Most Economic Route Selection
MERT	Multiple Environment, Real Time (OS)
MES	Manufacturing Execution System
MES	Menue-EntwicklungsSystem (Sinix, SNI)
MES	Minimum European Set (UTF, ISO 10646)
MESA	MetaEmailSearchAgent (WWW, Internet)
MESCH	Multi-WAIS Engine for Searching Commercial Hosts (WAIS, WWW)
MESFET	MEtal Semiconductor Field Effect Transistor (IC, FET)
MESH	Macintosh Enhanced SCSI Hardware (Apple, SCSI)
MESI	Modified - Exclusive - Shared - Invalid (SMP)
MESN	Media Event Status Notification
MESZ	MittelEuropaeische SommerZeit [+0200] (TZ)
MET	Memory Enhancement Technology (HP), "MEt"
MET	Micro Exposure Tool (Intel, EuropeV)
MET	Middle European Time [+0100] (TZ, CET, METDST, MEZ)
METAL	Machine Evaluation and Translation Language (Siemens)
METAL	Macro Expansion Template Attribute Language (TAL, ZPT, ZOPE)
METDST	Middle European Time Daylight Saving Time [+0200] (TZ, MET, MEZ)
MEU	Multiformat Engine Unit (LCD, Sony)
MEWDE	My EMACS Web Development Environment (EMACS, WWW)
MEZ	MittelEuropaeische [sommer] Zeit [+0200] (TZ)
MF	Multi Frequency
MFAST	Mwave Folded Array Signal Transform [DSP] (IBM, DSP)
MFC	Memory Flow Controller (SPE, Cell, IBM)
MFC	Microsoft Foundation Classes (MS)
MFC	Music Feature Card (IBM, Yamaha, MIDI)
MFD	Multi-Functional Display (Airbus, A380)
MFENET	Magnetic Fusion Energy NETwork
MFG	Mit Freundlichen Gruessen [= best wishes]
MFG	Multi-Function Gateway
MFI	MainFrame Interactive (IBM)
MFII	Multi-Functional [keyboard] II (IBM)
MFIP	Multi-Function Interoperability Processor
MFKS	MultiFunktionales KonferenzSystem
MFLOPS	Million FLoating-point Operations Per Second (CPU)
MFM	Modified Frequency Modulation
MFP	MultiFunction Product (HP)
MFS	MOSIX File System (MOSIX, DFSA)
MFS	Macintosh File System (Apple)
MFS	Message Format Service (IBM, IMS)
MFS	Mobile File Sync (IBM)
MFT	Master File Table (NTFS)
MFT	Multiprogramming with a Fixed number of Tasks (IBM, OS, OS/MFT, OS/MVT)
MFV	MehrFrequenzwahlVerfahren
MFW	my face when
MGA	Matrox Graphics Adapter (Matrox)
MGA	Monochrome Graphics Adapter
MGCP	Media Gateway Control Protocol (VoIP, RFC 2705)
MGI	Multi-Function Interpreter
MGM	Memory Grant Manager (Informix, DB)
MH	Mobile Host (MHP)
MH	Modified Huffman (Fax)
MHDL	MIMIC Hardware Description Language
MHEG	Multimedia and Hypermedia information coding Expert Group (JTC1, ISO)
MHL	Mobile High-definition Link
MHP	Multimedia Home Platform (ETSI)
MHP	[columbia] Mobile Host Protocol
MHPCC	Maui High Performance Computing Center (org., USA)
MHS	Message Handling System (GOSIP, X.400, Novell, SPX, IPX)
MHTML	MIME [e-mail encapsulation of aggregate documents, such as] HTML (MIME, HTML, RFC 2110)
MHTML	Messaging HyperText Markup Language (HTML)
MI	Management Interface
MIA	Missing In Action (telecommunication, Usenet, IRC)
MIA	missing in action
MIAW	Movie In A Window
MIB	Management Information Base (OSI, SNMP)
MIC	Machine Identification Code
MIC	Media Interface Connector (FDDI, PMD)
MIC	Memory Interface Controller (IBM, Cell)
MIC	Memory in Cassette (Seagate, EEPROM, Streamer, AIT)
MIC	Message Integrity Check / Code
MIC	Model-Integrated Computing
MIC	Multiple Interface Connection (Kyocera)
MICA	MODEM ISDN Channel Integration (Telebit, MODEM, ISDN)
MICE	Modular Integrated Communications Environment
MICO	MICO Is CORBA (ORB, CORBA, Uni Frankfurt)
MID	Message IDentifier (ATM)
MID	Mobile Information Device
MID	Multiple Interface Declaration (OLSR)
MIDI	Musical Instruments Digital Interface (MIDI)
MIDL	Microsoft Interface Definition Language (NT)
MIDP	Mobile Information Device Profile (J2ME, Java, JSR-118)
MIDPEG	Mobile Information Device Profile Expert Group (Sun, AOL, Motorola, NEC, Nokia, Palm, Samsung, Sharp, ...)
MIF	Module Interconnection Facility (Proteus)
MIG	Mach Interface Generator (Mach, IDL)
MII	Media Independent Interface
MIIS	Microsoft Identity Integration Server (MS)
MIKEY	Multimedia Internet KEYing (cryptography, VoIP)
MIL	Matrox Imaging Library
MILNET	MILitary NETwork (USA, mil., network)
MILOS	Maschinelle Indizierung auf Linguistischer Grundlage fuer OPAC Systeme (OPAC)
MILSTAR	Military Strategic TActical Relay (mil., USA)
MILSTD	Military STandarD (mil., USA), "MIL-STD"
MIMD	Multiple Instruction [stream], Multiple Data [stream] (CPU)
MIME	Multipurpose Internet Mail Extensions (RFC 2045/2046/2047/2048/2049, IETF)
MIMO	Multiple Input, Multiple Output (Agere-Systems, WLAN, Bell)
MIMO	Multiple Input, Multiple Output (WLAN)
MIMOLA	Machine Independent MicrOprogramming LAnguage (HDL)
MIN	Multistage Interconnection Networks
MINC	Multilingual Internet Names Consortium (org., Internet)
MINISTREL	Models for INformatIon STorage and REtrievaL (OA, BIS, ESPRIT)
MINT	Mint is Not TOS (Atari), "MiNT"
MINT	Multimedia-kommunikation aif Integrierten Netzen und Terminals
MINX	Multimedia Information Network eXchange
MIO	Memory Input/Output (Motorola)
MIO	Modular Input/Output [architecture] (HP)
MIP	Main Information Packet (CD-MRW)
MIP	Multimission Interactive Picture
MIP	Multum In Parvo (3D, SAT)
MIPS	Microprocessor without Interlocked Piped Stages
MIPS	Million Instructions Per Second (CPU)
MIPV6	Mobile IP V6 (IP), "MIPv6"
MIR	Maximum Information Rate
MIR	Micro-Instruction Register (IC)
MIS	Management Information System
MIS	Mega Iterations per Second
MIS	Micro Instruction Sequencer (Intel, CPU)
MIS	Mounting Interface Standard (VESA)
MISD	Multiple Instruction [stream], Single Data [stream] (CPU)
MISO	Multiple Input, Single Output (WLAN)
MISRA	Motor Industry Software Reliability Association (UK)
MISS	Mecklenburg Internet Service System (ISP)
MISSI	Multilevel Information System Security Initiative (org.)
MISX	Metered Services Information eXchange (Internet)
MIT	Management Information Tree
MIT	Massachusetts Institute of Technology (org., USA)
MIT	Mobile Internet Toolkit (MS, .NET)
MITM	Man In The Middle [attack]
MJ	Modular Jack
MKS	Mortice Kern Systems (manufacturer)
MKT	Multifunktionelles KartenTerminal (CT, ICC)
ML	Machine Learning
ML	Mail List
ML	Maintenance Lead (JCP)
ML	Meta Language
ML2	MaskLess Lithography
MLA	Mail List Agent
MLA	Micro Lens Array
MLC	Multi Level Cell (IC, PCMCIA, Flash, Intel, SLC)
MLD	Multicast Listener Discovery [protocol] (IPV6, Multicast, RFC 2710)
MLE	MultiLine Entry field (IBM, OS/2)
MLI	Measurement Layer Interface (UMA)
MLI	Multiple Link Interface (ODI)
MLIA	[symposium on] Machine Learning in Information Access (AAAI, AI, conference)
MLID	Multiple Link Interface Driver (ODI, LAN)
MLM	Mailing List Manager [software]
MLMA	Multi-Level Multi-Access (MAC)
MLP	Meridian Lossless Packaging (DVD, audio)
MLP	Mozilla Localization Project (Mozilla)
MLP	MultiLink Point-to-Point Protocol (PPP)
MLR	Multi-channel Linear Recording [technology] (Tandberg, Streamer)
MLS	Messaging Layer Security (IETF)
MLS	MultiLevel Secure [operating systems / platforms] (SELinux)
MLT	Master Lower Tester (ISO 9646-3, TTCN)
MLT3	MuLTilevel-3 [encoding] (Schneider & Koch, FDDI), "MLT-3"
MM	Media Manager (Novell, Netware, SMS)
MM	Military Message (mil.)
MM	Mobile Management (RR, CM, GSM, mobile-systems)
MMA	MIDI Manufacturer Association (org., IMA)
MMA	Microcomputer Managers Association (org., USA)
MMAPI	Mobile Media API (Java, Sun, JMF, API, JSR-135)
MMB	message me back
MMC	MIDI Machine Control
MMC	Microsoft Management Console (MS, Windows NT, XP)
MMC	MultiMedia Commands (SAM)
MMC	MultiMediaCard
MMCA	MultiMediaCard Association (org.)
MMCD	MultiMedia Compact Disk (Sony, Philips, CD)
MMCDE	MultiMedia Compact Disk - Erasable (Sony, Philips, CD), "MMCD-E"
MMCF	MultiMedia Communications Forum (org.)
MMDO	Magnetic Modulation Direct Overwrite
MMDS	Multi-channel, Multi-point Distribution System
MMF	Make Money Fast (Usenet, ECP, EMP)
MMF	Memory Mapped File (Windows 95, Windows NT)
MMF	Multimode Fiberoptic cable (SMF)
MMFS	Manufacturing Message Format Standard (MAP)
MMHID	MultiMedia Human Interface Device
MMHS	Military Message Handling System (mil., MHS)
MMI	Mixed Mode Interpreter (JIT, IBM, Java)
MMIO	Memory Mapped I/O (I/O)
MML	Maker Markup Language (FrameMaker)
MMOG	Massive Multiplayer Online Games
MMORPG	Massive Multiplayer Online RolePlaying Games
MMOS	Massive Multiplayer Online Science (MMO)
MMP	Multilink Multichasis PPP (PPP)
MMPM2	MultiMedia Presentation Manager /2 (IBM, OS/2), "MMPM/2"
MMR	Modified Modified Read (Fax)
MMRSG	Mobile Multi-hop Relay Study Group (IEEE), "MMR SG"
MMS	Manufacturing Message Specifications / Standard (MAP, EIA, RS-511, ISO, DIS 9506)
MMS	Maximum Message Size
MMS	Microsoft Media Server [protocol] (MS, Internet)
MMS	Module Making System (VMS)
MMS	Multilevel Mail Server
MMS	Multimedia Messaging Service (mobile-systems)
MMTC	Massive Machine-Type Communication (MTC, 3GPP), "M-MTC"
MMU	Mass Memory Unit
MMU	Memory Management Unit
MMVF	MultiMedia Video File [disk] (NEC, DVD)
MMWM	MultiMedia Window Manager (X-Windows)
MMX	Mobile Module PCI eXpress [specificiation] (Nvidia, PCIe)
MMX	MultiMedia eXtensions (Intel, CPU)
MNC	Mobiles Network Codes (mobile-systems)
MNG	Multiple-image Network Graphics [format]
MNOS	Metal Nitride Oxide Semiconductor (IC)
MNP	Microcom Networking Protocol
MO	Machine Object (PO)
MO	Management Object (OSI)
MO	modus operandi
MOB	Memory Ordering Buffer (Intel, CPU)
MOBA	Multiplayer Online Battle Arena (ARTS, RTS)
MOBI	Mobility Open Blockchain Initiative (org.)
MOCS	Microsoft Official Curriculum Seminar (MS, ATEC, MCSD)
MOD	Magneto-Optical Disk (OD)
MODACOM	MObile DAta COMmunication
MODCA	Mixed Object Document Content Architecture (IBM), "MO:DCA"
MODEM	MOdulator DEModulator
MODI	Microsoft Office Document Imaging (MS)
MOE	Measure of Effectiveness
MOES	Molekulare Optisch-Elektrische Schaltungstraeger
MOESI	Modified - Owned - Exclusive - Shared - Invalid (AMD)
MOF	Managed Object Format (CIM, DMTF)
MOF	Meta Object Facility (OMG, UML)
MOF	Microsoft Operations Framework (MS)
MOLAP	Multidimensional OnLine Analytical Processing (OLAP)
MOLED	Molecule Organic Light Emitting Display (OLED)
MOLI	Microsoft OnLine Institute (MS)
MOLO	Mobile Other Licensed Operator (mobile-systems, MVNO)
MOLP	Microsoft Open Licence Pack (MS)
MOM	Message Orientated Middleware (IBM)
MOM	Microsoft Operations Manager (MS, SMS)
MONALISA	MOdelling NAturaL Images for Synthesis and Animation, "MONA LISA"
MONET	high data rate MObile interNET (network)
MOO	MUD Object Orientated (Internet, OOP, MUD)
MOOC	Massive Open Online Course (Internet)
MOP	Maintenance Operations Protocol (DEC)
MOP	Meta Object Protocol (CLOS)
MOP	Multiple Original Prints
MOPRIA	MObile PRinting Alliance (org., Canon, HP, Samsung, Xerox), "Mopria"
MOPS	Million Operations Per Second
MOR	Mining Object Repository (OP, Oracle, DB)
MOS	Master Operating System (OS, Varian)
MOS	Metal Oxide Semiconductor (IC)
MOS	Minimum Operating System (OS, UNIVAC 9200, UNIVAC 9300)
MOS	Multiprogramming Operating System (OS, NCR)
MOSA	Microsoft Online Subscription Agreement (MS)
MOSA	Multiplayer Online Survival Arena
MOSES	Major Open Systems Environment Standards
MOSFET	Metal Oxide Semiconductor Field Effect Transistor (IC, FET)
MOSIX	Multicomputer Operating System for UnIX (Unix, Cluster, MOSIX)
MOSP	Microsoft Online Services Partnership (MSN)
MOSPF	Multicast [extensions to ] Open Shortest Path First [routing] (IP, OSPF, RFC 1584)
MOSRO	MObiles-Sicherheits-ROboter-System
MOST	Media Orientated Systems Transport
MOST	Mobile Open Systems Technologies (UK, Uni Lancaster)
MOT	Means of Test
MOTAS	member of the appropriate sex
MOTIS	Message-Orientated Text Interchange System (ISO 10021, JTC1)
MOTOS	member of the opposite sex
MOTSS	More Of The Sameold Sameold (Usenet)
MOTSS	member of the same sex
MOU	Memorandum Of Understanding (IPOC, TLD, Internet)
MOUS	Microsoft Office User Specialist (MS, Windows)
MOVE	Microsoft Overlay Virtual Environment (MS)
MOVI	[projekt] MObile VIsualisierung (DFG)
MOWORM	Magneto-Optical Write Once Read Many, "MO-WORM" 
MP	Management Pack (MS, MOM)
MP	MegaPIXEL (PIXEL, photo)
MP	Multi Processor
MP	MultiProtocol
MP	[PPP] Multilink Protocol (MPPP, RFC 1990)
MP3	MPEG audio layer 3 (MPEG, audio, IIS, ISO)
MPC	MPOA Client (MPOA, ATM)
MPC	Modular Port Concentrator
MPC	Multimedia Personal Computer
MPD	Message Preparation Directory
MPDA	MultiPlatform DiskArray
MPDU	Message Protocol Data Unit (PDU)
MPE	Multi Protocol Encapsulation (DVB)
MPE	Multi-Programming Executive (OS, HP, HP 3000)
MPEG	Motion Picture Expert Group [old term] (MPEG)
MPEG	Moving Picture Expert Group (org., ISO 11172-1, JTC1)
MPEGTS	Moving Picture Expert Group - Transport Stream (MPEG, TS), MPEG-TS
MPEV	Multiple Programming Executive/V (HP), "MPE/V"
MPEXL	Multiple Programming Executive/XL (HP), "MPE/XL"
MPF1	MikroProFessor 1, "MPF 1"
MPI	Message Passing Interface (SMP, Cluster)
MPI	Multiprocessor Interconnect Bus
MPIF	Message Passing Interface Forum (manufacturer)
MPL	Mozilla Public License (Netscape)
MPLS	Multi-Protocol Label Switching (RFC 3031)
MPM	Metra Potential Method
MPM	Multi Processing Modul (Apache)
MPM	Multi-user ??? Program for Microcomputers (CP/M, OS, DR), "MP/M"
MPM2	MultiMedia Presentation Manager/2 (OS/2, IBM), "MPM/2"
MPML	Main Profile @@ Main Level (MPEG), "MP@@ML"
MPNET	Multi-user ??? Program / NETwork (MP/M, CP/NET, OS), "MP/NET"
MPNOS	Multi-user ??? Program / ??? (MP/NET, CP/NOS, OS), "MP/NOS"
MPOA	Multi-Protocol Over ATM (ATM)
MPOW	Multiple Purpose Operator Workstation
MPP	Massive Parallel Processor / Processing (MPP)
MPP	Message Posting Protocol (RFC 1204)
MPP	Message Processing Program
MPPC	Microsoft Point-to-Point Compression (MS, RFC 2118)
MPPD	Multi Purpose Peripheral Device
MPPE	Microsoft Point to Point Encryption (MS, cryptography, RFC 3078)
MPPP	Multilink Point-to-Point Protocol (PPP, RFC 1990, MP, Ascend)
MPR	Maet- och Provningsradet [National Board for Measurement and Testing] (org., Sweden, SWEDAC)
MPR	MultiPoint Relay (OLSR)
MPRT	Moving Picture Response Time
MPS	MPOA Server (MPOA, ATM)
MPS	Megabytes Per Second
MPS	Multi Processor Specification (BIOS, HT, MS, Windows)
MPS	MultiPage Signal (Fax)
MPS	MultiProcessor Specification (SMP, Intel)
MPSA	Microsoft Products and Services Agreement (MS)
MPSX	Mathematical Programming System eXtended (IBM)
MPT	Memory Performance Technology (BIOS, MSI)
MPT	Ministery of Post and Telecommunications (org., Japan)
MPT	MultiPort Transceiver
MPT1327	[British] Ministry of Post and Telecommunications [standard] 1327
MPTA	Multi Protocol Transport Architecture (IBM, SNA)
MPTCP	MultiPath TCP (TCP)
MPTN	Multi Protocol Transport Networking (IBM)
MPTS	Multi Protocol Transport Services (IBM, MPTN)
MPTS2	Multi Protocol Transport Services / 2 (IBM, OS/2), "MPTN/2" 
MPU	MicroProcessor Unit (SIA, RL)
MPU401	MIDI Processing Unit 401 (Roland, MIDI), "MPU 401"
MPW	Macintosh Programmers Workshop (Apple)
MPX	MultiProgramming eXecutive (IBM, OS, IBM 1800)
MPX	MultiProgramming eXecutive (OS)
MQA	Master Quality Authenticated (audio)
MQI	Message Queueing Interface (IBM)
MQT	Materialized Query Table (IBM, DB)
MQTT	Message Queuing Telemetry Transport
MQUIPS	Million QUality Improvements Per Second
MR	MODEM Ready (MODEM)
MR	Magneto - Resistive (HDD)
MR	Modified Read (Fax)
MRA	Multi Resolutions Analysis
MRAM	Magnetoresistive Random Access Memory (IC, RAM)
MRB	Method Request Broker (OMG)
MRBC	Multiple Resolution Bitmap Compiler (MS, Windows)
MRC	MOSIX Research the Clouds (MOSIX)
MRCF	Microsoft Realtime Compression Format (MS)
MRCI	Microsoft Realtime Compression Interface (MS)
MRCS	Multi-Rate Circuit Switching
MRH	Memory Repeater Hub (Intel)
MRIB	Multicast RPF Routing Information Base (RPF, Multicast, PIM, MSDP)
MRJ	Macintosh / MacOS Runtime for Java (Java, Apple)
MRJSDK	Macintosh Runtime for Java Software Developer Kit (Apple, Java), "MRJ SDK"
MRM	Multi Resolution Meshes (Intel, 3D)
MRML	Multimedia Retrieval Markup Language (Multimedia, Internet, XML)
MRNET	Minnesota Regional NETwork (network, USA)
MRO	Mandatory Router Option [flag] (CATNIP)
MROC	Multicommand Required Operational Capability
MROM	Macrocode Mask Read Only Memory (ROM)
MROM	Mask Read Only Memory (ROM)
MROMB	Modular RAID On MotherBoard (Intel, RAID, ZCR), "MRO MB"
MRP	Material / Manufacturing Resource Planning
MRP	Material Requirement Planning (PPS, CIM)
MRS	Media Recognition System (DAT)
MRSE	Message Retrieval Service Element
MRTD	Machine Readable Travel Document(s)
MRTG	Multi Router Traffic Grapher
MRU	Maximum Receive Unit [size] (SLIP, PPP)
MRU	Most Recently Used
MRX	MagnetoResistive eXtended [technology] (HDD)
MS	Memory Stick
MS	Message Store
MS	Meta Signaling (ATM, ???)
MS	MicroSoft (manufacturer, MS)
MS	Mobile Station (GSM, mobile-systems)
MSA	Management Service Architecture
MSA	MicroService Architecture (SOA)
MSA	MultiSource Assignment
MSAN	Multi-Server Access Node
MSAP	Management Service Access Point (OSI, OSI/RM, SAP)
MSAP	Mini Slotted Alternating Priorities (MAC)
MSATA	Mini Serial Advanced Technology Attachment (SATA), "mSATA"
MSB	Most Significant Bit (BIT)
MSBA	Microsoft Baseline Security Analyzer (MS)
MSC	MicroSoft C
MSC	Microprocessor Standardization Committee (Oerg., IEEE)
MSC	Mobile services Switching Center (PLMN, GSM, GPRS, mobile-systems)
MSCDEX	MicroSoft Compact Disk EXtensions (CD)
MSCHAP	MicroSoft Challenge Handshake Authentication Protocol (MS), "MS-CHAP"
MSCM	Multiple Slots on Continuation Mechanism (DQDB)
MSCP	Mass Storage Control Protocol
MSCS	MicroSoft Cluster Server [Wolfpack] (MS, Cluster)
MSCT	Microsoft Shared Computer Toolkit (MS)
MSD	Most Significant Digit
MSDE	MicroSoft Data Engine (MS, DB)
MSDE	Microsoft SQL server Desktop Engine / Environment (MS, SQL)
MSDL	MicroSoft Download Library (MS)
MSDN	Macintosh Software Distribution Network (FidoNet, Apple)
MSDN	MicroSoft Developer Network (MS)
MSDNAA	MicroSoft Developer Network Academic Alliance (MS)
MSDOS	MicroSoft Disk Operating System (MS, OS, PC)
MSDP	Multicast Source Discovery Protocol (Internet, PIM-SM, Multicast, RFC 3618)
MSE	Mean Squared Error
MSE	Media Source Extensions (W3C, HTML, Javascript)
MSE	MicroSoft Exchange server (MS)
MSE	Microsoft Security Essentials (MS)
MSE	Multimedia Software Engineering (Multimedia)
MSEN	Media Status Event Notification
MSFIS	MicroSoft Fax Information Service (MS)
MSFP	Management Service Focal Point (IBM)
MSFTEU	Maximum Surprise For The End User (slang, Cygwin)
MSH	Microsoft SHell (MS)
MSI	Medium Scale Integration
MSI	Micro-Star International (manufacturer, Taiwan)
MSI	MicroSoft Installer (MS, WIndows)
MSIE	MicroSoft Internet Explorer (MS, WWW, MSIE)
MSIL	MicroSoft Intermediate Language (MS, .NET, CLI)
MSISDN	Mobile Station ISDN Number (PLMN, GSM, mobile-systems), "MS-ISDN"
MSIX	Metered Services Information eXchange [protocol] (Internet, ISP)
MSJVM	MicroSoft Java Virtual Machine (MS, Java)
MSL	Master Security Lock (mobile-systems)
MSL	Maximum Segment Lifetime (TCP/IP)
MSL	Microsoft Software Library (Internet, MS)
MSL	Mirrored Server Link
MSM	Media Support Module (ODI)
MSM	Metal Semiconductor Metal (IC)
MSMQ	MicroSoft Message Queue [server / services] (MS)
MSN	Microsoft Support Network (Internet, MS)
MSN	Monitoring cell Sequence Number (UNI, ATM)
MSN	Multiple Subscriber Number (Euro-, ISDN)
MSNF	Multiple Systems Networking Facility (IBM)
MSOS	Mass storage Operating System (OS, CDC)
MSP	Media Signal Processor (Samsung, MMX, ARM)
MSP	Message Security Protocol
MSP	Message Send Protocol (RFC 1159)
MSP	Multitasking System Program (OS, Hemenway)
MSP7	Modular System Program /7 (OS, IBM), "MSP/7"
MSPI	M&T Software Partner International [gmbh]
MSPL	MicroSoft Public License (MS, Ms-RL), "Ms-PL"
MSR	Machine Specific Register (IC)
MSR	Mess-, Steuer- und Regelungssysteme
MSR	Mobile Support Router (MHP)
MSR	Model Specific Register (Intel, Pentium, IC)
MSRC	Microsoft Security Response Center (MS)
MSRL	MicroSoft Reciprocal License (MS, Ms-PL), "Ms-RL"
MSRN	Mobile Station Roaming Number (MM, HLR, MS-ISDN, GSM, mobile-systems)
MSRPC	MicroSoft Remote Procedure Call (MS, DCOM), "MS-RPC"
MSRT	Malicious Software Removal Tool (MS)
MSS	MIMOLA Software System (MIMOLA)
MSS	Maximum Segment Size (TCP, ADSL)
MSS	Microsoft Speech Server (MS)
MSS	Mobile Synchronisation Services (mobile-systems)
MSSE	Message Submission Service Element
MST	Mountain Standard Time [-0700] (TZ, MDT, USA)
MST	Multi-Stream Transport
MSTP	Multiple Spanning Tree Protocol (STP, VLAN, IEEE 802.1s)
MSTSC	MicroSoft Terminal Services Client (MS)
MSU	Millions of Service Unit (IBM, TC)
MSVC	Meta-Signaling Virtual Channel (ATM)
MSVC	MicroSoft Visual C++ (MS)
MSW	Machine Status Word
MSXML	Microsoft XML core services (MS, COM, XML,)
MT	Machine [assisted] Translation
MT	Mannesmann Tally [gmbh] (manufacturer)
MT	Message Transfer / Type
MT	Mobile Termination (GSM, mobile-systems)
MT	Moluccas Time [+0830] (TZ)
MTA	Mail Transport Agent (SMTP)
MTA	Main Table Area (CD-MRW)
MTA	Message Transfer Agent (MTS, OSI, X.400)
MTBF	Mean Time Between Failure (HDD, ...)
MTBRP	Mean-Time-Between-Parts-Replacement
MTC	MIDI Time Code (MIDI)
MTC	Machine-Type Communication (3GPP)
MTC	Master Test Component (ISO 9646-3, TTCN)
MTD	Memory Technology Driver (IBM, PC-DOS)
MTDA	Mean Time Data Availability
MTDS	Magnetic Tape Operating System (OS)
MTE	MuTating Engine (Viren), "MtE"
MTEC	Motorola Training and Education Center (org., Chicago)
MTF	Message Text Formats
MTF	Microsoft Tape Format (MS)
MTF	Modulation Transfer Function
MTF	more to follow
MTH	Memory Translator Hub (Intel)
MTI	MIPS Technologies Inc. (manufacturer, SGI)
MTJ	Magnetic Tunnel Junction (MRAM)
MTOS	Magnetic Tape Operating System (OS, Datapoint)
MTP	Media Transfer Protocol (Windows, MCE)
MTP	Memory Translation and Protection (Infiniband)
MTP	Message Transfer Part (ISDN, GSM, mobile-systems, SS7)
MTR	Mining Table Repository (OP, Oracle, DB)
MTRJ	Mechanical Transfer Registered Jack
MTRR	Memory Type Range Register (CPU, Pentium Pro, IC)
MTS	Magnetic Tape System (OS, HP, HP 2100)
MTS	Message Transfer System (MHS)
MTS	Michigan Terminal System (OS)
MTS	Microsoft Transaction Server (MS, DB, WSH, COM)
MTT	MailTrusT (cryptography)
MTT	Multiple Transaction Translator
MTTF	Mean Time To Failure
MTTFF	Mean Time To First Failure
MTTR	Mean Time Trouble Repair
MTTR	Mean Time to Recovery / Repair / React
MTU	Maximum Transmission Unit (SLIP, PPP, IP, PPPoE)
MTU	Message Transfer Unit
MUA	Mail User Agent
MUBIS	MUltimediales BueroInformationsSystem (OA, BIS, TU Braunschweig), "MuBIS"c
MUCK	Multi-User Chat Kingdom (MUD)
MUD	Multi-User Dungeon (MUD)
MUEW	eW MonopolUEbertragungsWeg, "MueW"
MUGD	MUMPS User Group Deutschland (MUMPS, user group, Org), "MUG-D"
MUI	Management User Interface (OMF, UI)
MUI	Multimedia User Interface (SGI, UI)
MULDEM	MULtiplexer-DEMultiplexer
MULE	MULtilingual Enhancement of GNU EMACS (EMACS, GNU)
MULTICS	MULTiplexed Information and Computing Service (OS, MIT, Bell)
MULTOS	MULtimedia Office Server (OA, BIS, ESPRIT)
MUMIMO	Multi User Multiple Input Multiple Output (WLAN), "MU-MIMO"
MUMPS	MUMPS Development Committee (org., MUMPS)
MUMPS	Massachusetts general hospital Utility Multi-Programming System
MUMPS	Multi-User Multi-Programming System ??? (OS, DEC)
MUPAD	Multi Processing Algebra Data [tool] (Uni Paderborn, Germany, CAS), "MuPAD"
MUSH	Multi-User Shared Hallucination (MUD)
MUSICAM	Masking-pattern adapted Universal Subband Integrated Coding And Multiplexing (MPEG, Digital audio)
MUT	Master Upper Tester (ISO 9646-3, TTCN)
MUTIOI	???, "MuTIOI"
MUTOS	MultiUser-/multitasking Timesharing Operating System (GDR, OS)
MUX	MUltipleXer
MVA	Multi Vendor Architecture
MVA	Multidomain Vertical Alignment [technology] (LCD, Fujitsu)
MVC	Model View Controller (Smalltalk, GUI)
MVC	Multi-View-CODEC (Blu-ray, 3D)
MVCC	MultiVersion Concurrency Control [system] (PostgeSQL, DB)
MVI	Motion Video Instructions (DEC, CPU, Alpha)
MVIF	Multi-Vendor Interacting Forum (org., IN)
MVNO	Mobile Virtual Network Operator (mobile-systems, MOLO)
MVP	Most Valuable Professional [bonus program] (MS)
MVP	minimum viable product
MVP	most valuable player
MVRCA	Magnalink Variable Resource Compression Algorithm (PPP, RFC 1975)
MVS	Multiple Virtual Storage (IBM, OS, OS/MVS)
MVS	Multiple Virtual System (OS)
MVSESA	Multiple Virtual Storage/Extended System Architecture (IBM), "MVS/ESA"
MVSESASP	Multiple Virtual Storage/Extended System Architecture System Product (IBM), "MVS/ESA SP"
MVSSP	Multiple Virtual Storage/System Product, "MVS/SP" 
MVSTSO	Multiple Virtual Storage/Time Sharing Option (IBM), "MVS/TSO"
MVSXA	Multiple Virtual Storage/eXtended Architecture, "MVS/XA" 
MVT	Multiprogramming with a Variable number of Tasks (IBM, OS/MVT, OS)
MWC	Mobile World Congress (mobile-systems, conference)
MWCM	Molecular Wire Crossbar Memory (RAM, IC, HP)
MWI	Media Wearout Indicator (SSD)
MWS	Management WorkStation
MWS	Matsushita White Skipping (Fax)
MX	Mail eXchange (Unix)
MXB	Multimedia eXension Board (SNI)
MXC	Multimedia eXtension Connector
MXM	Mobile PCI eXpress Module (Nvidia, PCI)
MXML	Macromedia Flex Markup Language (Macromedia, XML)
MYDP	MobilitY DisplayPort, "MyDP"
MYOB	mind your own business
MZ	Mark Zbikowski (MS-DOS, MCB)
MZAP	Multicast-scope Zone Announcement Protocol (RFC 2776, Multicast)
N/A	not {applicable,available}
N/M	never mind
NAARS	National Automated Accounting Research System (USA)
NAAS	Network As A Service
NAB	National Association of Broadcasters (org., USA)
NAB	Netware Asynchronous Board (Novell, Netware)
NABTS	North American Broadcast Teletext Standard (USA)
NAC	Network Administration Center
NAC	Network Admission Control (Cisco)
NAC	Networks and Communications
NAC	Null Attached Concentrator (FDDI)
NACLP	North American Conference on Logic Programming (USA)
NACM	Networks And Communications Marketing
NACS	National Advisory Committee on Semiconductors (org., USA)
NACS	Netware Asynchronous Communication Server (Novell, Netware)
NACS	Network Access Control System (Netware, DES, cryptography)
NACSIS	National Academic Center for Science Information Systems (org., USA)
NACT	Neural Adaptive Control Technology [project] (NN)
NAD	Network Access Device
NADB	National Archaeological DataBase (DB, USA)
NAEC	Novell Authorized Education Center (Novell, Netware)
NAFAIK	not as far as I know
NAG	National Algorithms Group [ltd] (UK, org., predecessor), "NAg"
NAG	Network Architecture Group (org.)
NAG	Numerical Algorithms Group (UK, org.), "NAg"
NAI	Netzwerk Arbeitswelt Informatik (manufacturer)
NAIIN	No Abuse In InterNet (org.)
NAL	Netware Application Launcher (Novell, Netware, NAM)
NALIS	Nevada Academic Libraries Information System
NAM	Netware Application Manager (Novell, Netware, NAL)
NAMP	Netware, Apache, MySQL, PHP (Novell, Netware, Apache, PHP, DB)
NAMS	National Association of Multimedia Shareware (org., USA)
NAP	Network Access Point (IN)
NAP	Network Access Protection (MS, Windows, Vista)
NAPLPS	North American Presentation Level Protocol Syntax (BBS)
NAPT	Network Address and Protocol Translator (IP)
NAPTR	Naming Authority PoinTeR (Enum, DNS)
NARP	Non-Broadcast Multiple Access Address Resolution Protocol (RFC 1735)
NAS	Netware Access Services (Novell, Netware)
NAS	Network Application Services (DEC)
NAS	Network Application Support
NAS	Network Attached Storage (NFS, CIFS, HDD)
NASI	Netware Asynchronous Service Interface (Novell, Netware)
NAT	[IP] Network Address Translator (RFC 1631, IP)
NATOA	National Association of Telecommunications Officers & Advisors (org., USA)
NAU	Network Addressable Unit (IBM, SNA, OSI)
NAU	Network Attachment Unit (GigaB, IP-router)
NAUN	Nearest Active Upstream Neighbour (MAC)
NAVNET	NAVy NETwork (mil., USA, network)
NB	Nota bene (slang, Usenet, IRC)
NB	nota bene
NBAR	Network-Based Application Recognition
NBCD	Natural Binary Coded Decimal
NBD	no big deal
NBDD	NetBIOS Datagram Distribution [server] (NETBIOS)
NBE	Not-Below-or-Equal
NBFCE	NETBIOS Frames Control Program (NETBIOS)
NBFCP	[PPP] NETBIOS Frames Control Protocol (PPP, NETBIOS, RFC 2097)
NBFM	Narrow Band Frequency Modulation
NBIC	Nano-Bio-Info-Cogno [initiative] (USA)
NBIS	Network Based Information Systems, "NBiS"
NBMA	Non-Broadcast Multiple Access (UNI, ATM)
NBN	National Broadband Network (Australia)
NBNS	NetBIOS Name Server (NETBIOS)
NBP	Name Binding Protocol (AppleTalk)
NBS	Narrow Band Socket (Intel, Nokia)
NBS	National Bureau of Standards (org., predecessor, NIST)
NBT	NETBIOS on TCPIP (MS)
NC	Network Channel / Connect / Control
NC	Network Co-ordinator (FidoNet)
NC	Network Computer [reference profile] (Apple, IBM, Netscape, Oracle, Sun, Internet)
NC	Norton Commander (Symantec)
NC	Numerical Control
NCA	Network Communications Adapter
NCA	Network Computing Architecture (Oracle, Apollo)
NCA	Network Control Analysis
NCA	Nexus Computing Agent (MS, Palladium)
NCA	Nexus Computing Agent (NGSCB, MS, Palladium)
NCA	Novell Certification Alliance (Novell, Netware)
NCAIR	National Center for Automated Information Research (org., USA)
NCAM	National Center for Accessible Media (org., USA)
NCB	Network Control Block (LAN)
NCC	Network Control / Coordination Center
NCC	Network Control Computer
NCCF	Network Communications Control Facility (IBM)
NCCS	NASA Center for Computational Sciences (org., NASA)
NCD	Network Computing Devices (manufacturer)
NCD	Norton Change Directory (DOS)
NCDMA	Narrowband - Code Division Multiple Access (telecommunication, mobile-systems, CDMA), "N-CDMA"
NCE	Nomadic Computing Environment (Tadpole)
NCGA	National Computer Graphics Association (org., USA)
NCHPC	National Consortium for High Performance Computing (org., HPC, USA)
NCI	Network Channel Interface
NCI	Non Coded Information
NCIA	Native Client Interface Architecture (IOS)
NCIJT	National Cyber Investigative Joint Taskforce (FBI)
NCIP	Novell Certified Internet Professional (Novell, WWW, CNA)
NCIRC	NATO Computer Incident Response Capability
NCITS	National Committee for Information Technology Standards (org., USA)
NCL	Null Convention Logic (CPU)
NCLP	Novell Certified Linux Professional (Noell, Linux)
NCMOS	N-channel [Silicon Gate Reversed] CMOS
NCN	Nixdorf Communications Network
NCOHPCC	National Coordination Office for High Performance Computing and Communications (org., USA, HPC), "NCO/HPCC"
NCOS	Network Computer Operating System (OS, Oracle, Internet)
NCOS	Non-Concurrent Operating System (OS, UNIVAC 9200, UNIVAC 9300)
NCP	Netware Core Protocol (Novell, IPX)
NCP	Network Control Processor
NCP	Network Control Program (BBN, ARPANET)
NCP	Network Control Program / Point (IBM)
NCP	Non-Carbon Paper
NCP	Not Copy-Protected
NCPE	Netware Core Protocol Extension (NCP, Netware, IPX)
NCPIE	National Council on Patient Information and Education (org., USA)
NCR	National Cash Registers (manufacturer, AT&T)
NCS	National Communications System (USA)
NCS	Network Computing System (HP, Apollo)
NCS	Network Control System
NCSA	National Center for Supercomputing Applications (org., USA)
NCSC	National Computer Security Center (org., USA)
NCSC	National Cyber Security Centre (org., UK)
NCSC	North Carolina Supercomputing Center (org., USA)
NCSD	National Cyber Security Division
NCSI	Network Communications Service Interface (NMP)
NCSL	National Computer Systems Laboratory (NIST, org., USA)
NCSL	National Conference of Standards Laboratories (org., USA)
NCSNDR	Network Computing System Network Data Representation (HP, Apollo), "NCS NDR"
NCSS	Non Commentary Sources Statements (LOC)
NCSS	Number Crunching Statistical System
NCSTRL	Networked Computer Science Technical Reference Library (WWW)
NCT	Network Control and Timing
NCTA	National Cable & Telecommunications Association (org., USA)
NCTE	Network Channel-Terminating Equipment
NCTL	National Computer and Telecommunications Laboratory (org., USA)
NCU	Non-Cacheable Units
ND	Navigation Display (Airbus, A380)
NDA	Network Delivery Access
NDA	Network Display Adapter
NDA	Non-Disclosure Agreement
NDA	Norddeutsche DatenAutobahn (network)
NDAS	Network Direct Attached Storage (HDD)
NDBMS	Network DataBase Management System (DB)
NDBS	Non-standard DataBase System (DB)
NDC	National Destination Code (MS-ISDN, GSM, mobile-systems)
NDC	Network Data Collection
NDC	Node Data Controller (Zenith)
NDCC	Network Data Collection Center
NDD	Norton Disk Doctor [software]
NDDL	Neutral Data Definition Language (DDL)
NDE	NeWS Development Environment
NDEF	NFC Data Exchange Format (NFC)
NDI	Network Distributed ISDN [for windows NT] (AVM, ISDN, Windows NT)
NDIS	Network Driver Interface Specification (3COM, MS)
NDK	Native Developpment Kit (Android)
NDL	Network Database Language (DB, 4GL)
NDM	Normal Disconnected Mode (IRDA, IRLAP, NRM)
NDMP	Network Data Management Protocol
NDMS	Netware Distributed Management Services (Novell, Netware)
NDP	Neighbor Discovery Protocol (RFC 2462)
NDP	Numeric Data Processor
NDPA	Network Problem Determination Application
NDR	Network Data Representation (NCS, DCE, Apollo)
NDR	Network Data Representation service (DCE/RPC)
NDR	Non-Delivery Report (SMTP)
NDR	Non-Destructive Read
NDRO	Non-Destructive ReadOut
NDS	Netware Directory Services (Novell, Netware)
NDS	Network Data System
NDT	Net Data Throughput
NDT	Newfoundland Daylight Time (TZ, NFT)
NDT	Non-Destructive Testing
NDU	Network Device Utility
NDV	Non DSL Village (WIMAX, DSL)
NE	Network Element
NE	Netzebene (DTAG)
NE1	anyone
NEA	Network Endpoint Assessment
NEA	[Siemens] NEtzwerkArchitektur (NEA, Siemens)
NEAB	NEA Benutzerebenenprotokoll (NEA, Siemens)
NEAN	NEA Netzwerkebenenprotokoll (NEA, Siemens)
NEAR	National Electronic Accounting and Reporting
NEARNET	New England Academic and Research NETwork (USA, network), "NEARnet"
NEAT	New Enhanced Advanced Technology (AT)
NEAT	Novell Easy Administration Tool (Novell, Netware)
NEATE	NEA Transportebenenprotokoll (NEA, Siemens)
NEBS	Network Equipment Building System
NEC	National Electrical Code (USA)
NEC	Nippon Electronic Corporation (manufacturer)
NED	NASA Extragalactic Database (DB)
NEDM	not even Doom music
NEDO	New Energy and industrial technology Development Organization (org., Japan)
NEFS	Network Extensible File System, "NeFS" 
NEII	National Engineering Information Initiative (org., USA)
NEM	No-Eviction Mode (Intel, HT, CPU)
NEM	Nothing Else Matters (slang, Usenet, IRC)
NEMS	Nanoelektromechanische Speicher (IC, RAM)
NEP	Never-Ending Program
NEREN	NEbraska Research and Education Network (USA, network)
NERO	Neuro-Evolving Robotic Operatives [project]
NES	News Electronic Service
NES	Nintendo Entertainment System
NESC	National E-Science Centre (org., UK), "NeSC"
NESPINN	NEurocomputer fuer Spikende Neuronale Netze (TUB)
NEST	Netware Embedded Systems Technology (Novell, Netware)
NET	Network Entity Title
NETBEUI	NETBIOS Extended User Interface (UI)
NETBIOS	NETwork Basic Input Output System (IBM, RFC 1001/1002), "NetBIOS"
NETBLT	NETwork BLock Transfer (IP)
NETBT	NetBIOS over TCP/IP (NETBIOS, TCP/IP), "NetBT"
NETCDF	NETwork Common Data Format, "NetCDF"
NETDA	NETwork Design and Analysis
NETPARS	NETwork Performing Analysis Reporting System
NETSS	National Electronic Telecommunication Surveillance System (USA)
NEWS	Netware Early Warning System (Novell, Netware)
NEWS	Networked Extensible Windowing System (Sun), "NeWS" 
NEWT	NeWS Terminal, "NeWT" 
NEXT	NEw eXtended Technology, "NeXT" 
NFA	Name Field Address (Forth)
NFA	Non-determistic Finite-state Automation
NFA	no flaming allowed
NFAIS	National Federation of Abstracting and Information Services (org., USA)
NFAS	Non Facilities-Associated Signaling (ISDN, PRI)
NFC	Near Field Communication (Bluetooth)
NFC	Normalization Form C(ompostion) (Unicode)
NFC	no functional change
NFGM	Nano-Floating Gate Memory (RAM, IC)
NFM	No Further Message (slang, Usenet)
NFR	Near Field Recording [technology]
NFS	Network Facilities Services
NFS	Network File System (Sun, Unix, RFC 1094/1813/3010)
NFSP	Netware File Service Protocol (Novell, Netware)
NFT	Network File Transfer (DNA, DEC)
NFT	NewFoundland Time [-0330] (TZ, NDT)
NG	NewsGroup (slang, Usenet)
NGDD	New Generation Desktop Design (Mitsubishi)
NGE	Not-Greater-or-Equal
NGFF	Next Generation Form Factor (Intel)
NGI	Nederlands Genootschap for Informatica (org., Netherlands)
NGIO	Next Generation Input / Output (I/O, Intel)
NGPP	Next Generation Print Path [old term] (MS, Windows, Vista, XPS)
NGPT	Next Generation POSIX Threading (POSIX, IBM)
NGS	Non-Government Standard (USA)
NGSB	Non-Government Standards Body
NGSBC	Next Generation Secure Computing Base (MS, Windows, XP)
NGSCB	Next Generation Secure Computing Base (MS, Palladium)
NGSFF	Next Generation Small Form Factor (Samsung, SSD)
NHRP	[NBMA] Next Hop Resolution Protocol (X.25, ATM, NBMA, IETF)
NHSE	National HPCC Software Exchange (USA)
NI	Network Interconnect / Interface
NI	Normenausschuss Informationstechnik (Din, org.)
NI	Normenausschuss Informationsverarbeitungssysteme [1987-1995] (DIN, predecessor, NI)
NIA	Network Information Access
NIAC	National Infrastructure Advisory Council (org., USA)
NIAHGB	Normenausschuss Informationstechnik - Ad-Hoc Gruppe Biometrie (NI, DIN), "NI-AHGB"
NIAP	National Information Assurance Partnership (org., NIST, NSA)
NIAS	Netware Internet Access Server (Novell, Netware)
NIC	Network Information Center (Internet, org.)
NIC	Network Interface Card / Controller
NIC	Numeric Intensive Computing
NICAM	Near-Instantaneously Companded Audio Multiplex (audio)
NICD	NIckel CaDmium [batterie], "NiCd" 
NICE	Network Information and Control Exchange (DECNET)
NICOL	Network Information Center On-Line
NICOLAS	Network Information Center On-Line Aid System
NID	Namespace IDentifier (URN)
NID	Network ID (ID, mobile-systems)
NIDL	Network Interface Definition Language (Apollo, DOMAIN, NCA)
NIDOS	NIxdorf Disk Operating System (OS, SNI)
NIDR	Network Information Discover and Retrieval
NIDX	Network Intrusion Detection eXpert system (BELLCORE, XPS)
NIE	Newton Internet Enabler (Apple, PDA)
NIFOC	naked in front of computer
NIFTP	Network Independent File Transfer Program (FTP)
NIH	not invented here
NIHCL	National Institute of Health [c++] Class Library (PD)
NII	National Information Infrastructure [program] (USA, org.)
NIIT	National Information Infrastructure Testbed (ISH, USA)
NILFS	New Implementation of a Log-structured File System (FS, NTT)
NIMBY	not in my backyard
NIMH	NIckel Metal Hydride [battery], "NiMH" 
NIMT	National Institute for Management Technology (org., Irland)
NIPC	National Infrastructure Protection Center (org., USA)
NIPT	[international symposium on] New Information Processing Technologies (conference, MITI)
NIR	Network Information Registry / Retrieval
NIS	Network Information Service (NSF)
NIS	Network Information System (Unix)
NISC	Network Information and Support Center
NISCC	National Infrastructure Security Coordination Centre (org., UK)
NISDN	Narrowband Integrated-Services Digital Network (ISDN), "N-ISDN"
NISI	Network Information Services Infrastructure
NISO	National Information Standards Organization (org., USA)
NISS	National Information on Software and Services (USA)
NISSPAC	NISS Public Access Collections (NISS)
NIST	National Institute of Standards and Technology (org., USA)
NISYP	Network Information System / Yellow Pages, "NIS/yp" 
NIT	Network Information Tabel (DVB)
NITF	National Imagery Transmission Format
NITOL	Norway-net with IT for Open Learning (network)
NITS	Network Independent Transport Service
NIU	Network Interface Unit
NIU	North american ISDN Users (USA, ISDN)
NIUF	North american ISDN Users Forum (USA, user group, ISDN, org.)
NJC	Nordic Journal of Computing (Finland)
NJE	Network Job Entry
NJE	Network Job Entry (BITNET, RSCS)
NJSZT	Neumann Janos SZamitogep-tudomanyi Tarsasag (org., Ungarn)
NKS	Network Knowledge Server
NKSR	Non-Kernel Security Related (Unix)
NKZ	NetzKontrollZentrum (Bundeswehr)
NL	Network Layer (ISO, OSI)
NL	New Line (ASCII)
NL	Number Lines (Unix)
NLA	Network Location Awareness (MS, Windows)
NLB	Network Load Balancing (MS, Windows)
NLDM	Network Logical Data Manager (IBM)
NLE	Not-Less-or-Equal
NLKD	Novell Linux Kernel Debugger (Novell, Linux)
NLM	Netware Loadable Module (Novell, Netware)
NLOS	Non Line Of Sight (WIMAX, LOS)
NLP	Natural Language Processing
NLP	Non-Linear Programming
NLP	Normal Link Pulse (ethernet, LAN)
NLPID	Network Layer Protocol IDentifier (ATM, OSI)
NLQ	Near Letter Quality
NLRI	Network Layer Reachability Information
NLRP	Natural Language Retrieval Processing
NLS	Native Language Support (HP)
NLS	Native Language System (OSF)
NLS	Network License Server
NLS	oNLine System
NLSP	Netware Link Services Protocol (Novell, Netware, IPX)
NLSP	Network Layer Security Protocol (ISO, IEC, ISO/IEC 11557)
NLUUG	NetherLand Unix User Group (org., user group)
NLV	National Language Version (IBM, OS/2, ...)
NM	Native Mode (PARISC, CM)
NM	Network Management
NM	never mind
NMA	Network Management Architecture (SNA)
NMAA	National Multimedia Association of America (org., USA)
NMAS	Novell Modular Authentication Services (Novell, Netware)
NMC	Network Management Center
NMCP	Network Management Communication Protocol
NMCS	National Military Command System (mil., USA)
NMEA	National Marine Electronics Association [protocol] (org., USA, GPS)
NMEO	NetWorker Module for EMC Symmetrix for Oracle (Oracle, EMC, DB)
NMF	Network Management Forum
NMF	not my fault
NMI	Non-Maskable Interrupt
NML	National Media Laboratory (org., USA)
NML	Natural Mapping Language (XPP, MPP)
NML	Network Management Layer (TMN)
NMM	Netzwerk-integrierte Multimedia Middleware
NMOS	Negative-channel Metal-Oxide Semiconductor (IC)
NMP	Network MODEM Program
NMP	not my problem
NMPF	Network Management Productivity Facility (IBM)
NMPL	Netscape/Mozilla Public License (Netscape), "N/MPL"
NMS	Network Management Station / System (Novell, Netware)
NMS	Network Monitoring Station
NMSU	New Mexico State University (org.)
NMT	Nordic Mobile Telephone (mobile-systems)
NMU	Non-Maintainer Upload (Linux, Debian)
NMU	not much, you?
NMVT	Network Management Vector Transport
NN	Neural Network (NN)
NNAPI	Neural Network API (API)
NNI	Network Node Interface (ATM)
NNI	Network to Network Interface
NNS	Netware Named Services (Novel, Netware)
NNSC	NSF Network Service Center (org., NSF)
NNTP	Network News Transfer Protocol (Internet, RFC 977, Usenet)
NNTPS	Network News Transfer Protocol - Secured ??? (NNTP, Internet, Usenet)
NNTR	No Need To Reply (slang, Cygwin)
NNX	Network Numbering eXchange
NOA	Net On Air (Internet)
NOC	Network Operations Center
NOCS	Network Operations Center System
NOD	Nemocnica na Okraji Disku
NODIS	NSSDC Online Data and Information Service (NSSDC)
NOI	Node Operator Interface
NOKOS	NOKia Open Source license (Nokia)
NOM	no offence meant
NOMA	National Online Media Association (org., USA)
NOOB	newbie
NOOBS	New Out Of the Box Software
NORGEN	Network Operations Report GENerator
NORMA	NO Remote Memory Access (OSF/1, Multi-Server)
NORP	normal ordinary {respectable,responsible} person
NOS	Network Operating System
NOSA	Netlabs Open Source Archive
NOSAC	Netlabs Open Source Archive Client (NOSA)
NOSQL	Not Only SQL (SQL), "NoSQL"
NOTA	None Of The Above (slang, Usenet, IRC)
NOTIS	Network Operator Trouble Information System
NOW	Network Of Workstations (Cluster)
NOYB	none of your business
NP	Network Performance
NP	No Problem (telecommunication, Usenet, IRC)
NP	no problem
NPA	Network Performance Analyzer
NPA	Network Printer Alliance (IEEE 1284, IBM, Lexmark, Xerox)
NPA	Network Professional Association (org., USA)
NPA	Numbering Plan Area
NPAC	Northeast Parallel Architectures Center (org., USA, HPC)
NPAPI	Netscape Plugin Application Programming Interface (WWW, API)
NPC	Network Parameter Control
NPC	Non-Player Character (MMORPG)
NPC	non-player character
NPD	Network Products Division (Toshiba)
NPDA	Network Problem Determination Application (IBM)
NPES	National Printing Equipment Association (org., USA)
NPH	Non Parse Headers (HTTPD, CGI)
NPI	Network Printer Interface
NPL	Netscape Public License (Netscape)
NPL	Non-Procedural Language
NPM	Network Performance Monitor
NPM	Node Package Manager
NPMS	Named Pipes / Mail Slots (MS)
NPSI	NCP Packet Switching Interface (IBM, NCP)
NPSI	Network Protocol Service Interface
NPSS	NASA Packet Switch System (NASA)
NPT	Nested Page Table
NPTL	Native POSIX Thread Library (POSIX)
NPTN	National Public Telecomputing Network (network, USA)
NPV	Net Present Value
NQS	Network Queuing System
NRC	National Research Council (org., USA)
NRCLSE	National Resource for Computers in Life Science Education (USA)
NREN	National Research and Education Network (USA, network)
NRFD	Not Ready for Data
NRFPT	not ready for prime time
NRIP	Novell Routing Information Protocol (Novell, Netware), "nRIP"
NRM	Network Resource Management
NRM	Normal Response Mode (IRDA, IRLAP, NDM)
NRN	National Research Network (USA, network)
NRN	No Reply Necessary (slang, Usenet)
NRN	no reply necessary
NRN	not right now
NROFF	New Run-OFF (Unix)
NRPC	Notes Remote Procedure Call (Lotus)
NRPE	Nagios Remote Plug-in Executor (Nagios)
NRPE	Nagios Remote Plugin Executor
NRPT	Name Resolution Policy Table
NRS	Name Registration System
NRS	Novell Replication Services (Novell, Netware)
NRT	Non-Requesting Terminal
NRTVBR	Non-RealTime Variable Bit Rate (VBR, ATM, BIT), "nrt-VBR"
NRZ	Non-Return-to-Zero [recording]
NRZI	Non-Return-to-Zero, Invert to ones [encoding]
NS	Name Server (DNS, Unix)
NS	National Standard
NSA	National Security Agency (org., USA)
NSAI	National Standards Authority of Ireland (org., Irland)
NSAP	Network Service Access Point (OSI, OSI/RM, SAP)
NSAPA	Network Service Access Point Address (OSI, NSAP)
NSAPI	Netscape Server Application Programmer's Interface (Netscape, WWW, C/S, API)
NSB	National Science Board (USA, org.)
NSBD	Not-So-Bad Distribution (Bell)
NSC	National Security Council (org., USA)
NSC	National SemiConductor (manufacturer)
NSC	Network Service Center
NSC	Network Storage Corporation
NSCA	Nagios Service Check Acceptor (Nagios)
NSCA	National institute for Supercomputing Applications
NSD	National Security Directive (USA)
NSD	Network Shared Disk (GPFS, HDD)
NSE	Network Support Encyclopedia (Novell)
NSEC	Network Switching Engineering Center
NSERC	Natural Sciences and Research Council (org., USA)
NSF	National Science Foundation (org., USA)
NSF	Norges StandardiseringsForbund (org., Norway)
NSF	Notes Storage Facility (Lotus)
NSFIP	NextStep Fuer IntelProzessoren, "NSfIP" 
NSFNET	National Science Foundation NETwork (network, USA, Internet), "NSFnet"
NSFW	Not Safe For Work (slang, WWW)
NSFW	not suitable for work
NSG	Network Services Group
NSI	NASA Science Internet (NASA, network)
NSI	Name Service Independent (DCE/RPC, CDS)
NSI	Network Store Interface (MS, Windows)
NSIS	National Schengen Information System (SIS, Europe)
NSIS	Next Steps In Signaling (RFC 4080)
NSIS	Nullsoft Scriptable Install System
NSN	NASA Science Network (USA, network)
NSP	Name Service Protocol (DNS)
NSP	Native Signal Processing (Intel, CPU)
NSP	Network Service Point
NSP	Network Service Provider
NSP	Network Services Protocol (DNA)
NSPMP	Network Switching Performance Measurement Plan
NSPR	NetScape Portable Runtime (Netscape, API)
NSR	Non-Source Routed
NSRD	National Software Reuse Directory (USA)
NSS	Namespace Specific String (URN)
NSS	Network Security Services (Mozilla, Internet)
NSS	Network Server System (Airbus, A380)
NSS	Network Storage Solutions (manufacturer)
NSS	Nodal Switching Subsystem (NSFNET)
NSS	Novell Storage System (Novell, Netware, FS)
NSSA	Not So Stubby Area (OSPF, RFC 1587)
NSSDC	National Space Science Data Center (org., USA)
NST	Network Security Toolkit
NST	Newfoundland Standard Time (TZ)
NST	North Sumatra Time [+0630] (TZ)
NSTAN	NebenSTellenANlagen (DTAG, CBX), "NStAn"
NSTC	National Science and Technology Council (org., USA)
NSTL	National Software Testing Lab (org., USA)
NSTS	National Secure Telephone System
NSTX	Name Server Tunnel Exchange [protocol]
NSW	National Software Works (OS)
NT	Netzwerk Terminator, Network Terminator (ISDN)
NT	Nome Time [-1100] (TZ)
NT	[Windows] New Technology (MS, OS, Windows)
NT1	Network Termination [unit] 1 (ISDN)
NTAS	NT Advanced Server (MS, Windows NT)
NTBA	Network Termination for Basic Access (ISDN)
NTBBA	Netzwerk-Terminationspunkt BreitBandAngebot (DTAG, DSL)
NTC	National Telecommunications Conference (conference, USA)
NTCIP	National Transportation Communications for ITS Protocol (IST)
NTDS	[Windows] NT Directory Services (MS, Windows NT, DS)
NTE	Network Terminal Equipment
NTFS	[windows] New Technology File System
NTI	Network Termination Interface
NTIA	National Telecommunications and Information Administration / Agency (org., USA)
NTK	Need-To-Know (slang, Usenet, IRC)
NTK	Newton ToolKit (Apple)
NTLM	[Windows] NT LAN Manager (MS, Windows NT, LAN, SMB)
NTN	National Telecommunications Network
NTN	no thanks needed
NTO	Network Terminal Option
NTP	Network Time Protocol (Internet, RFC 1119/1305)
NTS	Network Technical Support
NTS	Network Test System
NTS	New Typesetting System (TeX, DANTE)
NTS2	Network Transport Services /2 (IBM), "NTS/2"
NTSA	Netware Telephony Services Architecture
NTSC	National Television Standards Committee (org., USA)
NTSC	Never The Same Color (slang)
NTSE	[Windows] NT Server / Enterprise edition (MS, Windows NT), "NTS/E"
NTT	Nippon Telephone & Telegraph (org., Japan)
NUA	Network User Address
NUC	Next Unit of Computing (Intel)
NUI	Network User Identification (Datex-P)
NUISSH	Natur- und UmweltInformationsSystem Schleswig-Holstein (UIS), "NUIS-SH"
NUMA	Non Uniform Memory Access (SMP)
NUNP	no users, no problems
NURB	Non Uniform Rational B-spline
NURBS	Non-Uniform Rational B-Spline (CAD, Animation)
NUS	National University of Singapore (org.)
NUTEK	[National Board for Industrial and Technical Development] (org., Sweden)
NVD	National Vulnerability Database (NIST, USA)
NVDIMM	Non-Volatile Dual In-line Memory Module (DIMM, IC)
NVDM2	NetView Distribution Manager /2 (OS/2, IBM), "NVDM/2"
NVM	never mind
NVME	Non-Volatile Memory Express (SSD, PCI), "NVMe"
NVMEOF	Non-Volatile Memory Express Over Fabrics (SSD), "NVMeoF"
NVMFS	Non-Volatile Memory File System (SanDisk)
NVMHCI	Non-Volatile Memory Host Controller Interface
NVMM	NetBSD Virtual Machine Monitor
NVN	National Videotex Network (USA, network)
NVP	Network Voice Protocol
NVR	Network Video Recorder (Internet)
NVRAM	Non-Volatile Random Access Memory (RAM, IC)
NVS	NachrichtenVermittlungsSystem (INPOL)
NVSG	NVidia SceneGraph [SDK] (Nvidia, SDK)
NVT	Network Virtual Terminal (Telnet, Internet)
NW	no way
NWCS	Netware Workstation Compatible Service (Netware, Windows NT)
NWIP	NetWare Internet Protocol (Novell, Netware)
NWNET	NorthWestern states NETwork (network, USA), "NWNet"
NWO	NetWork Operator (ETSI, ETSI 201 671)
NWP	Numeric Weather Modelling
NX	No eXecute (AMD, Athlon)
NXT	next
NYPA	not your personal army
NYSERNET	New York State Education and Research NETwork (network, USA), "NYSERNet"
NZCS	New Zealand Computer Society (org., Neuseeland)
NZT	New Zealand Time [+1130] (TZ)
NZUSUGI	New Zealand Unix System User Group, Inc. (org., Unix, user group)
O2W	off to work
OA	Object Adapter (ORB, IDL)
OA	Office Automation
OA	Open Access (SPI, DB)
OAA	Open Arcade Architecture (Intel)
OACIS	Oregon Advanced Computing InStitute (org.)
OAD	Open Architecture Driver (Iomega)
OADG	Open Architecture Development Group (org.)
OAG	Online Airline Guide (CIS)
OAG	Open Application Group (org., USA)
OAGIS	Open Applications Group Interoperability Standard
OAI	Open Applications Interface
OAI	Open Archives Initiative (org.)
OAIS	Open Archival Information System (ISO 14721)
OAK	Object Application Kernel (Java, predecessor, Sun)
OAM	Object Attribute Memory (Gameboy)
OAM	Operations, Administration and Management [cell] (ATM)
OAO	over and out
OARNET	Ohio Academic Resources NETwork (network, USA), "OARnet"
OAS	Office Automation System
OASF	Office Automation System Facilities (OA)
OASIS	Online Application System Interactive Software
OASIS	Open And Secure Information Systems (Eureka)
OASIS	Organization for the Advancement of Structured Information Standards (org.)
OASYS	Office Automation SYStem
OATS	Office Automation Technology and Services (OA)
OAW	Optically Assisted Winchester (HDD, Seagate)
OBAK	OBjektAbbildungskatalog (ATKIS)
OBB	Opaque Binary Blobs
OBD	On-Board Diagnostics
OBD	Online Bugs Database (Sun, DB)
OBDH	On-Board Data Handling (ESA, Venus-Express)
OBDR	One Button Disaster Recovery (HP, Streamer)
OBEX	OBject EXchange (WordPerfect)
OBGA	Organic Ball Grid Array (BGA, IC, CPU)
OBI	Open Buying on the Internet (Internet, WWW)
OBM	Original Brand Manufacturer
OBS	Online Book Store (Internet, WWW)
OBS	Open Broadcaster Software
OBS	Opensuse Build Service (openSUSE, Linux)
OBST	OBject management system of STONE (STONE)
OBTWIAVBP	OBligatory The World Is A Very Big Place (telecommunication, Usenet, IRC), "ObTWIAVBP"
OBU	On-Board-Unit
OBV	obviously
OBVS	obviously
OC	Object Class (OOP)
OC	Over-Clocked
OC1	Optical Carrier level 1 [51,48 Mbps] (SONET), "OC-1"
OC12	Optical Carrier level 12 [622,08 Mbps] (SONET, STM-4), "OC-12"
OC18	Optical Carrier level 18 [933,12 Mbps] (SONET, STM-6), "OC-18"
OC24	Optical Carrier level 24 [1244,16 Mbps] (SONET, STM-8), "OC-24"
OC3	Optical Carrier level 3 [155,52 Mbps] (SONET, STM-1), "OC-3"
OC36	Optical Carrier level 36 [1866,24 Mbps] (SONET, STM-12), "OC-36"
OC48	Optical Carrier level 48 [2488,32 Mbps] (SONET, STM-16), "OC-48"
OC768	Optical Carrier level 768 [39813,12 Mbps] (SONET, STM-256), "OC-768"
OC9	Optical Carrier level 9 [466,56 Mbps] (SONET, STM-3), "OC-9"
OC96	Optical Carrier level 96 [4976,64 Mbps] (SONET, STM-32), "OC-96"
OCAML	Objective Categorical Abstract Machine Language, "OCaml"
OCAP	Open Crypto Audit Project
OCAT	Open Capture and Analytics Tool (AMD)
OCC	Operations Control Center
OCC	Other Common Carrier
OCCA	Open Cooperative Computing Architecture
OCD	Off-Chip-Driver [calibration]
OCD	Out-of-Cell Delineation (UNI)
OCE	Open Collaborative Environment (Apple)
OCE	Optimized Connectivity Experience (WFA)
OCEO	Offensive Cyber Effects Operations
OCF	Open Clustering Framework
OCF	Open Computing Facility
OCF	Open Connectivity Foundation (org.)
OCFS	Oracle Cluster File System (Oracle, DB)
OCG	OEstereichische Computer Gesellschaft (org., Austria)
OCI	Open Container Initiative (org.)
OCL	OS/2 inside Class Library (OS/2)
OCL	Object Constraint Language (DB, OO, UML, CASE)
OCL	Open Content License (OPL)
OCL	Operation Control Language
OCLC	Online Computer Library Center (org., Internet, USA)
OCO	Object Code Only (OOP)
OCP	Open Compute Project (org.)
OCPA	Open Content Platform Association (org., Amiga, Sharp, JVC, Kyocera, ...)
OCR	Optical Character Recognition
OCS	Object Compatibility Standard (Motorola)
OCS	Object Container Streaming
OCS	Open Cabling System
OCSP	Online Certificate Status [revocation] Protocol (cryptography, RFC 6990)
OCX	OLE Control eXtensions (MS)
OD	Optical Disk
ODA	Office Document Architecture [protocol] (RFC 1197, ISO 8613, JTC1, ECMA)
ODA	Open Document Architecture (CCITT T.410)
ODAPI	Open Database Application Programming Interface (Borland, DB, API), "Odapi"
ODBC	Open DataBase Connectivity (WOSA, DB, API)
ODBMS	Object orientated Database Management System (DBMS, DB)
ODC	Optical Disc Corporation (manufacturer)
ODD	Operator Distance-Dialing
ODE	Object Database and Environment (AT&T, DB)
ODE	Online Data Entry
ODE	Open Dynamics Engine
ODETTE	Organization for Data Exchange by Tele-Transmission in Europe (org., Europe)
ODF	Open Document Format [for Office Applications] (OASIS, ISO/IEC 26300)
ODF	Opendoc Development Framework (Apple, OpenDoc)
ODF	Opendoc Part Framework (OpenDoc)
ODI	Open Data link Interface (Novell)
ODI	Open Device Interconnect
ODIA	OpenDoc Internet Adapter (Apple, ALOE, predecessor)
ODIF	Office Document Interchange Format (ISO 8613, ASN.1, ODA)
ODIN	Optimale Datenmodelle und algorithmen fuer Ingenieur- und Naturwissenschaften [auf hochleistungsrechnern] (Uni Karlsruhe, Germany, SNI)
ODINSUP	Open Data link Interface - Network driver interface specification SUPport (ODI, NDIS)
ODISS	Optical Digital Image Storage System
ODK	Office Development Kit
ODL	Object Description Language
ODL	Open Document Language (ODA, SGML)
ODLI	Open Data Link Interface
ODM	Object Database Manager (AIX, IBM)
ODM	Original Design Manufacturer (OEM)
ODMA	Open Document Management API (API)
ODMG	Object Database Management Group (org., DB)
ODP	Octal-Die-Package
ODP	Open Directory Project (WWW, Netscape)
ODP	Open Distributed Processing (ISO)
ODP	OverDrive Processor (Intel)
ODPR	OverDrive Processor Replacement (Intel)
ODR	Octal Data Rate (SDR, GDR, QDR)
ODR	Ontrack Data Recovery (Ontrack, Software, Netware)
ODR	Optimized Dynamic Routing (SNI)
ODS	Offenes Deutsches Schulnetz (network)
ODS	Office Dialog System (OA)
ODS	Open Data Services
ODS	Optical Data Systems [inc.] (manufacturer)
ODS	Output Delivery Database
ODS	Overhead Data Stream
ODSI	Open Directory Service Interfaces (MS, Windows NT)
ODSPE	Optical-based Digital Signal Processing Engine (DSP)
ODT	On-Die-Termination
ODT	Online Debugging Technique
ODT	Open DeskTop (SCO, GUI)
ODTW	others do the work (cf. "otdw source")
ODVA	Open DeviceNet Vendor Association (org.)
OE	Outlook Express (MS, Internet)
OEA	Organic and printed Electronics Association (org.), "OE-A"
OEB	Open eBook [standard] (MS, NuvoMedia, ...)
OECOS	Organizational Engineering for Communications and Organizational Systems (SNI, OA)
OEM	Original Equipment Manufacturer (ODM)
OEP	Operand Execution Pipelines (Motorola, CPU)
OES	Olivetti EntsorgungsService (Olivetti)
OES	Open Enterprise Server (Novell, Linux)
OF	Overflow Flag (assembler)
OFA	Optimal Flexible Architecture (Oracle)
OFC	Open Financial Connectivity (MS, banking)
OFC	of course
OFDM	Orthogonal Frequency Division Multiplexing (FDM, DVB-T, WIMAX)
OFDMA	Orthogonal Frequency Division Multiple Access (WIMAX)
OFET	Organic Field Effect Transistor
OFFIS	Oldenburg Forschungsinstitut Fuer Informatikwerkzeuge und -Systeme (org., Uni Oldenburg)
OFFSAP	Oracle Fusion For SAP (Oracle, SAP)
OFL	[SIL] Open Font License
OFS	Object File System
OFS	Old/Original File System (Amiga, FS)
OFS	Output Field Separator (AWK)
OFTA	OFfice of the Telecommunications Authority (org., Hongkong)
OFTP	ODETTE File Transfer Protocol (ODETTE)
OFX	Open Financial eXchange (banking, Intuit, MS, Checkfree, USA)
OGB	Opensolaris Governing Board (Solaris)
OGC	Office of Government Commerce (org., UK)
OGC	Open Geospatial Consortium (org., OWS)
OGM	Ogg Media Streams (DivX, video)
OGRAN	OpenGate - Router Access Node ??? (RND), "OG-RAN"
OGSA	Open Grid Services Architecture (grid, GGF)
OGSADAI	Open Grid Services Architecture - Database Access and Integration (OGSA, grid, IBM, Oracle), "OGSA-DAI"
OGSI	Open Grid Service Infrastructure (OGSA, GGF, WG, grid)
OH	Off-Hook (MODEM)
OH	other half
OHA	Open Handset Alliance (org., Android)
OHCI	Open Host Controller Interface (USB, Compaq, OPTI, Apple, UHCI)
OHKO	One Hit Knock Out (slang)
OIA	Operator Information Area (IBM)
OIC	Oh, I See (telecommunication, Usenet, IRC)
OIC	oh, I see
OID	Object IDentifier (OSI)
OIDL	Object Interface Definition Language
OIDP	Oracle Internet Development Pack (Oracle, Internet)
OIF	Outgoing InterFace (PIM, IIF, Multicast)
OII	Operations-Intelligence Interface (mil.)
OIIC	Optically Interconnected Integrated Circuits [project] (ESPRIT)
OIL	Operator Identification Language (ELI)
OIM	Open Information Model
OIP	Open Internet Platform (Caldera, Linux, SCO)
OIT	Onboard Information Terminal (Airbus, A380)
OIW	OSI Implementors Workshop (OSI)
OIW	Open Information Warehouse (SAP, R/3)
OLAP	OnLine Analytical Processing (DB)
OLE	Object Linking and Embedding
OLED	Organic Light Emitting Display (OLED, LED)
OLEDB	Object Linking and Embedding - DataBase (DB, OLE, MS), "OLE DB"
OLEDS	Object Linking and Embedding Directory Services (ODSI, MS), "OLE DS"
OLEO	Open Linking and Embedding of Objects (OLE, OpenDoc)
OLEP	Organic Light-Emitting Polymer [display]
OLI	Originating Line Information
OLIS	Oxford Library Information System
OLIT	OpenLook Interface Toolkit (OpenLook)
OLIVR	OnLine Interactive Virtual Reality, "OLiVR"
OLLI	OnLine Library Information
OLM	OnLine Monitor
OLMC	Output Logic Macro Cell (GAL)
OLOCA	Official List of Cygwin Acronyms (Cygwin)
OLPS	OnLine Programming System
OLRT	OnLine Real-Time
OLS	Online Library System
OLSR	Optimized Link State Routing (MANET, OLSR, RFC 3626)
OLT	Optical Line Terminal (EPON)
OLTEP	OnLine Test Executive Program
OLTM	Optical Line Terminating Multiplexer, "O-LTM" 
OLTP	OnLine Transaction Processing
OLWM	OpenLook Window Manager (OpenLook)
OM1	Open MPEG consortium 1 (org., MPEG), "OM-1"
OMA	Object Management Architecture (OMG)
OMA	Open Mobile Alliance (org., mobile-systems)
OMA	Outlock Mobile Access (mobile-systems, PDA, WAP)
OMADM	Open Mobile Alliance Device Management (OMA), "OMA DM"
OMADS	Open Mobile Alliance Data Sync (OMA), "OMA DS"
OMAP	Open Multimedia Application Platform (TI)
OMAP	Operations, Maintenance and Administration Part (SS7)
OMC	Operation and Maintenance Center (PLMN, GSM, mobile-systems)
OME	Open Messaging Environment (Novell)
OMEMO	OMEMO Multi-End Message and Object encryption (XMPP, PEP)
OMF	Object Management Framework (DME)
OMF	Object Module Format (IBM, MS)
OMF	Open Media Framework (org.)
OMFI	Open Media Framework Interchange (OMF)
OMG	Object Management Group (IBM, HP, DEC, Tandem, Sun, org.)
OMG	Oh My G-d (slang, Usenet, IRC)
OMG	oh my God
OMI	Open Messaging Interface
OMISTN	Optical Mode Interface SuperTwisted Nematic (LCD), "OMI-STN" 
OMN	Open Network Management
OMR	Optical Mark Reader (Fax)
OMR	Optical Mark Recognition
OMS	Object Management System
OMS	Onboard Maintenance System (Airbus, A380)
OMS	Open Music System (MIDI, Opcode Systems)
OMT	Object Management Technique (Westmount, CASE)
OMT	Object Modelling Technique (CASE)
OMTP	Off Main Thread Painting (Firefox)
OMW	On My Way (MMORPG, slang)
OMW	on my way
ON	Ordinary Node (Kazaa, P2P)
ONA	Open Network Architecture
ONAC	Operations Network Administration Center
ONAL	Off Network Access Line
ONC	Open Network Computing (Sun)
ONCXDR	Open Network Computing eXternal Data Representation (Sun), "ONC XDR" 
ONE	Omnifunctional Networking Environment (Panasonic)
ONE	Open Network Environment (Netscape)
ONF	Open Networking Foundation (org.)
ONFI	Open NAND Flash Interface (Flash), "ONFi"
ONI	OpenNet Initiative (org.)
ONI	Operator Number Identification
ONIX	ONline Information eXchange [guidelines]
ONMS	Open-Network Management System
ONNA	oh no, not again
ONNTA	oh no, not this again
ONS	Object Numbering System (EPC)
ONU	Optical Network Unit
ONVIF	Open Network Video Interface Forum (org.)
OO	Object Orientated
OOA	Object Orientated [system] Analysis (OOP)
OOAD	Object Orientated Analysis and Design (OOP)
OOB	Out Of Band (S-ATA), "OoB"
OOB	out of bounds
OOC	Object-Oriented Code
OOC	Optical Orthogonal Code [modulation]
OOC	out of curiosity
OOCTG	Object Orientated COBOL Task Group (CODASYL, org., OOP)
OOD	Object-Oriented Design
OODB	Object Oriented Data Base (OOP, DB)
OODBMS	Object Orientated Database Management System (DBMS, DB)
OODL	Object Orientated Dynamic Language (OOP)
OOF	Office of The Future (OA)
OOF	Out of Frame (DS3/E3)
OOI	out of interest
OOK	On-Off Keying
OOL	Object-Oriented Language (OOP)
OOL	Open Objects Library (OS/2)
OOM	Object Orientated Modelling (OO)
OOM	Object-Oriented Methodology (OOP)
OOM	Out Of Memory
OONI	Open Observatory of Network Interference (Org,, Internet)
OOO	Out Of Order [execution] (Intel, Pentium, CPU)
OOP	Object Orientated Programming (OOP)
OOPL	Object-Oriented Programming Language (OOP)
OOPS	Object Oriented Program Support (OOP)
OOPS	Object-Oriented Programming System (OOP)
OOPSLA	[conference on] Object Orientated Programming Systems, Languages and Applications (ACM, OOP, conference)
OOPSTAD	Object Orientated Programming for SmallTalk Application Development association (org., OOP)
OOS	Object-Oriented Systems
OOS	Out-Of-Sequence
OOSA	Object Orientated System Analysis (OOP)
OOSH	Object-Oriented SHell (OOP, Shell)
OOSOOM	out of sight, out of mind
OOT	Object-Oriented Technology (OOP)
OOTB	Out Of The Box (slang, Cygwin)
OOUI	Object Orientated User Interface (UI, OO, WPS)
OOXML	Office Open XML (MS, XML)
OP	Oracle9iAS Personalization (Oracle, DB)
OP	Original Poster (slang, Usenet)
OPA	Open Publishing Architecture
OPAC	Online Public Access Catalogue (Internet)
OPC	OLE for Process Control (OLE, HMI, SCADA)
OPC	Open Platform Communications
OPC	OpenGL Performance Characterization [project group] (OpenGL, org.)
OPC	Optical Proximity Correction [lithography]
OPC	Organic Photo Conductor
OPC	Overall Performance Category
OPCCA	Open Platform Communications - Classic Architecture (OPC), "OPC-CA"
OPCOS	OPerating COuntrieS
OPCR	Original Program Clock Reference
OPCUA	OLE for Process Control Unified Architecture (OPC, OLE), "OPC UA"
OPCUA	Open Platform Communications - Unified Architecture (OPC), "OPC-UA"
OPDU	Operation Protocol Data Units
OPDV	Ordnungsmaessigkeit und Pruefung der DatenVerarbeitung (GoBS, banking)
OPEN	Open Protocol Enhanced Networks
OPEN	[You-R] OPerating ENvironment (Infineon, RFID)
OPENBFS	Open Be File System (BeOS, FS), "OpenBFS"
OPENELEC	OPEN Embedded Linux Entertainment Center (Linux), "OpenELEC"
OPENEXR	OPEN EXtended Range ??? (HDR), "OpenEXR"
OPENGL	OPEN Graphics Language (OpenGL), "OpenGL"
OPENHAB	OPEN Home Automation Bus, "OpenHAB"
OPENHCI	OPEN Host Controller Interface (USB), "OpenHCI"
OPENIL	OPEN Image Library [old term] (DevIL), "OpenIL"
OPENPMF	Open Policy Management Framework (CORBA, COACH), "OpenPMF"
OPERA	Open PLC European Research Alliance (org., PLC, Europe)
OPES	Open Pluggable Edge Services
OPI	Open Prepress Interface (DTP)
OPIE	Open Palmtop Integrated Environment (Linux, PIM)
OPK	OEM Pre-installation Kit (MS, Windows, OEM)
OPL	Open Publication License (OCL)
OPL	Organizer Programming Language (Psion, PDA)
OPM	Operations-Per-Minute
OPM	Optimized Power Management (AMD, Opteron)
OPML	Outline Processor Markup Language (XML, RSS)
OPP	Object Push Profile (Bluetooth)
OPQ	Optimal Picture Quality [mode] (CRT, Iiyama)
OPREMA	OPtik-REchenMAschine
OPS	Operations Per Second (CPU)
OPS	Oracle Parallel Server (Oracle)
OPS	Outbreak Prevention Service (Firewall, TrendMicro)
OPS	operator status
OPS	operators
OPSEC	Open Platform for Secure Enterprise Connectivity (org., manufacturer, IDS)
OPT	Open Protocol Technology
OQL	Object Query Language (ODMG)
OR	Observation Report (CC)
OR	Originator / Recipient (X.400, MOTIS), "O/R"
ORAIS	Opportunities and Risks of Artificial Intelligent Systems (conference, GI)
ORB	Object Request Broker (OMA, OMG, CORBA, ORB)
ORCA	Online Resource Control Aid
ORDB	Open Relay DataBase (SPAM)
ORDBMS	Object Relational Database Management System (DBMS, DB)
ORITE	oh, right
ORK	Office Resource Kit (MS, Windows)
ORM	Object Role Modeling (OO, DB)
ORM	Object/Releational Mapper
ORM	Optical Remote Module
OROM	Optical Read Only Memory (ROM), "O-ROM" 
ORS	Output Record Separator (AWK)
ORT	Ongoing Reliability Test
OS	Operating System
OS2	Operating System /2 (IBM, OS), "OS/2"
OS200	Operating System 200 (Honeywell), "OS/200"
OS2000	Operating System 2000 (Honeywell), "OS/2000"
OS3	Oregon State Open Shop Operating System (OS, CDC 3300), "OS-3"
OS32MT	Operating System /32 - Multitasking Time (OS, Interdata), "OS/32-MT"
OS32ST	Operating System /32 - Serial Time (OS, Interdata), "OS/32-ST"
OS360	Operating System /360 (IBM, OS), "OS/360"
OS4	Operating System /4 (OS, UNIVAC 9700), "OS/4"
OS400	Operating System /400 (IBM, OS), "OS/400"
OS7	Operating System /7 (OS, UNIVAC 9700), "OS/7"
OS700	Operating System /700 (OS, Honeywell), "OS/700"
OS8	Operating System /8 (OS, DEC, PDP 8), "OS/8"
OS9	Operating System - 9 (Microware, OS), "OS-9"
OSA	Object System Adaptor (SOM)
OSA	Office Systems Administrator (OA)
OSA	Open Scripting Architecture (Apple, OS/2)
OSAC	Operator Services Assistance Center
OSADL	Open Source Automation Development Lab (org., OSS)
OSAIA	Open Source And Industry Alliance (org.)
OSAK	Open Systems Application Kernel
OSAM	Overflow Sequential Access Method (SAM)
OSAR	Optical Storage and Retrieval
OSBAR	Open Source Business AwaRd
OSBC	Open Source Business Conference
OSC	Ohio Supercomputer Center (org., USA)
OSCA	Only Specifically Cygwin-list Acronyms (OLOCA, Cygwin)
OSCAR	OnScreen Configuration & Activity Reporting (Apex)
OSCRL	Operating System Command Response Language
OSD	Object-based Storage Device
OSD	OnScreen Display
OSD	Open Software Description [manifest / standard] (MS, Marimba, XML, DU, DUP, MSIE)
OSDB	Open Source DataBase benchmark (benchmark)
OSDL	Open Source Development Lab (org., OSS)
OSDN	Open Source Development Network (OSS, Network)
OSDS	Operating System for Distributed Switching
OSE	Open Software / System Environment
OSEIA	Open System Environment profile for Imminent Acquisitions (OSE), "OSE/IA"
OSES	OperationsSystem/Einheitliches System (OS, ESER, GDR), "OS/ES"
OSF	OWS Service Framework (OGC, OWS)
OSF	Open Software Foundation (HP, DEC, IBM, org.)
OSF	Open Source Firmware (OCP)
OSF	Operations System Function (IN)
OSF	Oppose Sun Forever [ aka Open Software Foundation] (slang, org.)
OSF1	Open Software Foundation [system] /1 (OSF, OS, DEC), "OSF/1"
OSG	Open Systems Group (org., SPEC)
OSGI	Open Services Gateway Initiative (org., Motorola, Sun, DTAG, Siemens, Toshiba, ...), "OSGi"
OSI	Open Source Initiative (org., OSS)
OSI	Open Systems Interconnection (ISO 9646-1)
OSICS	OSI Communication Systems (OSI)
OSID	Origination Signaling IDentifier
OSINLCP	[PPP] OSI Network Layer Control Protocol (OSI, PPP, RFC 1377)
OSIRM	Open Systems Interconnection/Reference Model (ISO), "OSI/RM" 
OSKA	ObjektSchluesselKAtalog (ATKIS)
OSL	Open Shading Language (Sony)
OSL	Open Subscription License
OSM	Operating system Service Module (I2O)
OSM	Optical Storage Manager (ARMS)
OSMC	Open Source Media Center
OSME	Open Systems Message Exchange
OSMFT	Operating System / Multiprogramming with a Fixed number of Tasks (OS, IBM S/360), "OS/MFT"
OSMVS	Operating System / Multiple Virtual Space (OS, IBM, S/370, OS/MVT, successorr, OS/VS-2), "OS/MVS"
OSMVT	Operating System / Multiprogramming with a Variable number of Tasks (OS, IBM, S/360, S/370), "OS/MVT"
OSN	Office System Node (IBM, DIA, OA)
OSN	Open Systems Network
OSNR	Optical Signal-to-Noise Relation (FO)
OSO	OverScan Operation (VXA, Streamer)
OSP	Optical Storage Processor
OSP	OrganisationStrukturPlan
OSPCP	Operating System / Primary Control Program (IBM, OS, OS/360, predecessor), "OS/PCP"
OSPF	Open Shortest Path First [protocol / routing] (Internet, IGP, RFC 1583)
OSPM	Operating System directed [configuration and] Power Management
OSQL	Object-Structured Query Language (DB, SQL, OODBMS)
OSR	Optical Scanning Recognition
OSRT	Operating System / Real Time (OS, Destek Group), "OS/RT"
OSS	Open Sound System (Linux, audio)
OSS	Open Source Software (OSS)
OSS	Operator Service System
OSSIM	Open Source Security Information Management (OSS, SIM)
OSSVS	Operating System / Single Virtual Space (OS, IBM, S/370, OS/VS2), "OS/SVS"
OST	Open System Toolkit (Apollo)
OSTA	Optical Storage Technology Association (org.)
OSTC	Open System Test Consortium (org., OSTC)
OSTP	Office of Science and Technology Policy (org., USA)
OSVS1	Operating System / Virtual System - 1 (OS, IBM, S/370), "OS/VS-1"
OSVS2	(IBM, MVS), "OS/VS2"
OSVS2	Operating System / Virtual System - 2 (OS, IBM, S/370), "OS/VS-2"
OSWL2	OS-9 Windows / Level 2, "OSW/L2" 
OSWS	Operating System Work Station
OT	Object Technology
OT	Oblivious Transfer
OT	Off Topic (slang, Usenet)
OT	Open Transport (Apple)
OT	off topic
OTA	Office of Technology Assessment (org., IBM, HP, AEG, AT&T, SNI, ...)
OTA	Over-The-Air [update]
OTDR	Optical Time Domain Reflectometer (cable)
OTES	Outside Thermal Exhaust System (Abit)
OTFT	Organic Thin-Film Transistor (TFT)
OTG	[USB] On-The-Go (USB)
OTI	Object Technology International (IBM)
OTL	out to lunch
OTM	Object Transaction Monitor (COM, MTS)
OTN	Oracle Technology Network (Oracle)
OTOH	On The Other Hand (slang, Usenet, IRC)
OTOH	on the other hand
OTP	One Time Password
OTP	One Time Programmable [chip] (IC)
OTP	One Time Programs
OTP	Open Telecom Platform
OTP	one true pairing
OTPPP	Open Transport/Point-to-Point Protocol (Apple, OT, PPP), "OT/PPP"
OTPROM	One Time Programmable Read Only Memory (ROM, IC)
OTR	Off-The-Record (XMPP)
OTS	Object Transaction Service (CORBA)
OTS	Office TeleSystem (OA)
OTS	off the shelf
OTT	over the top
OTTOMH	off the top of my head
OU	Organizational Unit (MS, Windows NT, AD)
OUCL	Oxford University Computing Laboratory
OUG	Occam User Group (org., user group)
OUI	Organization Unique Identifier (IEEE)
OUI	Organizational Unit Identifier
OUM	Ovonic Unified Memory (ECD)
OUTWATS	OUTward Wide Area Telephone Service
OVAL	Open Vulnerability and Assessment Language (XML)
OVDC	Oracle Virtual Desktop Client (Oracle)
OVID	Object, View, and Interaction Design
OVMF	Open Virtual Machine Firmware (UEFI, QEMU)
OVPI	Open View Performance Insights (HP)
OVST	OrtsVermittlungsSTelle (DTAG)
OWA	Outlook Web Access / App (MS, WWW)
OWAMP	One Way Active Measurement Protocol (RFC 3763)
OWASP	Open Web Application Security Project (org., WWW)
OWB	Oracle Warehouse Builder (Oracle, DWH)
OWC	Optical Wireless Communication
OWE	Opportunistic Wireless Encryption (IEEE)
OWF	Object World Frankfurt (fair)
OWG	Optical WaveGuide (LWL)
OWL	Object Windows Library (Borland, API)
OWL	Ontology Web Language (WWW, W3C)
OWL	Open Windows Library (API)
OWLDL	Ontology Web Language Description Logic (OWL), "OWL DL"
OWORM	Optical Write Once Read Many, "O-WORM" 
OWS	OpenGIS Web Service (OGC, Internet)
OWTTE	or words to that effect
P2CC2P	PCI to CPU / CPU tp PCI [concurrency] (BIOS, PC, PCI, CPU), "P2C/C2P"
P2P	Peer to Peer [network]
P3P	Platform for Privacy Preferences (WWW)
P5P	PERL 5 Porters (PERL)
P64	Pointer 64 [bit] (BIT)
PA	Precision Architecture (HP)
PAAS	Platform As A Service
PABD	Pure Audio Blu-ray Disk (BD, audio)
PABX	Private Automatic Branch eXchange
PAC	PCI AGP Controller (Intel, IC, PCI, AGP)
PAC	Privilege Attribute Certificate (DCE)
PAC	Proxy Auto-Config (WWW, Mozilla)
PACE	Priority Access Control Enabled (3Com, ethernet)
PACER	Public Access to Court Electronic Records
PACS	Picture Archiving and Communications Systems
PACS	Public-Access Computing Systems
PACT	Partnership in Advanced Computing Technologies (org. UK)
PACT	Personal Air Communications Technology, "pACT"
PACT	Production Analyses Control Technique
PACX	Private Automatic Computer eXchange
PAD	Packet Assembling Disassembling (CCITT, X.3, X.28, X.29, PSDN)
PADES	PDF Advanced Electronic Signature (PDF), "PAdES"
PADI	PPPoED Active Discovery Initiation (PPPoED)
PADS	Programmer's Advanced Debugging System
PAE	Physical Address Extension (Intel, Pentium, PAE)
PAEB	Pan American EDIFACT Board (UN/EDIFACT)
PAEB	Pan American EDIFACT Board (org., EDIFACT), "PA/EB"
PAGP	Port AGgregation Protocol (Cisco, EtherChannel), "PAgP"
PAI	Process After Input (R/3)
PAKE	Password Authenticated Key Exchange (cryptography)
PAL	Paradox Application Language (Borland, DB)
PAL	Phase Alternating Line
PAL	Privileged Architecture Library (DEC, Alpha)
PAL	Processor Abstraction Layer
PAL	Programmable Array Logic
PALCD	Plasma Addressable Liquid Crystal Display (LCD)
PALD	Phase Alternating Line - Digital [768x576], "PAL-D"
PAM	Paging Area Memory
PAM	Pluggable Authentication Module (Linux, LISA)
PAM	Primary Access Method (BS2000)
PAM	Programmable Attribute Maps (DRAM, PCI)
PAM	Pulse Amplification Modulation
PAML	Publicly Accessible Mailing Lists (Internet, BBS)
PAN	Personal Account Number
PAN	Personal Area Network (IBM, Bluetooth)
PAN	Personal Area Networking [profile] (Bluetooth)
PANDORA	Preserving and Accessing Networked Documentary Resources of Australia
PANIX	Public Access internet/uNIX [system] (Unix, Internet, network)
PAP	Password Authentication Protocol (RFC 1334)
PAP	Printer Access Protocol (AppleTalk)
PAP	ProgrammAblaufPlan (DIN 66001)
PAPI	PC voice API (API, PC)
PAR	Portal ARchive (SAP, EP)
PAR	Positive Acknowledgement with Retransmission [protocols]
PAR	Project Authorization Request (IEEE)
PARC	Palo Alto Research Center (org., USA, Xerox)
PARISC	Precision Architecture, Reduced Instruction Set Computing (RISC, HP), "PA-RISC"
PARLE	[conference on] Parallel ARchitecture and Languages Europe (ECRC, conference)
PARTS	Parts Assembly and Reuse Tool Set (Visual Smalltalk)
PAS	Publicly Available Specifications (ISO)
PAS2	Personal Application System /2 (IBM, DB2/2), "PAS/2"
PASC	Portable Application Standards Committee (org., IEEE)
PASM	Parrot ASseMbly language (PERL)
PAT	Performance Acceleration Technique (Intel, MCH)
PAT	Port and Address Translation (IOS, Cisco, LAN, IP)
PAT	Program Association Table (DVB)
PAUSE	PERL Authors Upload SErver (PERL, CPAN)
PAUSE	Perl Authors Upload Server (PERL, CPAN)
PAWS	Protection Against Wrapped Sequence space (TCP, satellite)
PAX	Penny Arcade eXpo
PAX	Pixel Addressing eXtensions (Intel, RISC, CPU)
PAX	Portable Archive eXchange (SCO, Unix)
PAX	Private Automatic eXchange
PB	Pipeline Burst [cache]
PBAP	Phone Book Access Profile (Bluetooth)
PBC	Peripheral Bus Computer
PBE	Prompt By Example
PBI	Pacific Bell Internet (ISP)
PBI	Phone Based Interface
PBM	Play By Mail [game]
PBO	Precision Boost Overdrive (AMD, CPU)
PBO	Process Before Output (R/3)
PBR	Physically Based Rendering
PBS	Portable Batch System (Unix)
PBX	Private Branch eXchange
PC	Personal Computer
PC	Printed Circuit (IC)
PC	Priority Control
PC	Protocol Control
PC	Punched Card
PC	player character
PC	politically correct
PC97	Personal Computer 97 (MS), "PC 97"
PCA	Policy Certification Authority (DFN, PGP, cryptography)
PCA	Power Calibration Area (CD)
PCAT	Personal Computer - Advanced Technology, "PC-AT"
PCB	Printed Circuit Board
PCB	Process Control Block (BS2000)
PCB	Program Communication Block (IBM)
PCB	Protocol Control Block (TCP)
PCB	polychlorinated biphenyl(s)
PCC	Portable C Compiler
PCCA	Personal Computer Communications Associations (org., USA)
PCD	Photo CD (Kodak, CD)
PCD	Portal Content Directory (SAP, EP)
PCD	Process Control Device
PCDA	Program Controlled Data Acquisition
PCDATA	Parsed Character DATA (DTD, CDATA)
PCDOS	Personal Computer DOS (OS, DOS, IBM, PC), "PC-DOS" 
PCELS	Policy Core Extension lightweight directory access protocol Schema (LDAP, RFC 3703/4104)
PCERT	Purdue Computer Emergency Response Team
PCF	Point Coordination Function (MAC, 802.11a, WLAN)
PCF	Portable Compiled Font
PCH	Paging CHannel (GSM, CCCH, mobile-systems)
PCH	Pre-Compiled Headers
PCI	Peripheral Component Interconnect (PCI)
PCI	Protocol Control Information (OSI, ETSI)
PCIA	Personal Communications Industry Association (org., USA, SMS)
PCIAS	Peripheral Component Interconnect Advanced Switching (PCI, PCIe, ASI), "PCI AS"
PCIC	PC card I/O Card (PCMCIA, I/O)
PCID	Process-Context Identifier (CPU)
PCIE	Peripheral Component Interconnect Express, "PCIe"
PCIE	Permis de Conduire Informatique Europeen (ECDL)
PCIEAS	PCI Express Advanced Switching (PCI, ASI-SIG), "PCI-EAS"
PCIPM	PCI Power Management [specification] (PCI), "PCI PM"
PCIS	Portable Common Interface Set
PCISIG	Peripheral Component Interconnect - Special Interest Group (org., PCI, SIG), "PCI-SIG"
PCIX	Peripheral Component Interconnect - eXtended (PCI), "PCI-X"
PCIX	Personal Computer / unIX (IBM, PC), "PC/IX"
PCIXF	Personal Computer Integrated eXchange Format (OS/2), "PC/IXF"
PCL	Portable Common LOOPS (CLOS)
PCL	Printer Control Language (HP, PJL)
PCL	Programmable Command Language (CMU, DEC, TOPS)
PCLOB	Privacy and Civil Liberties Oversight Board (org., USA)
PCM	Personal Computer Manufacturer
PCM	Physical Connection Management (FDDI, SMT)
PCM	Plug Compatible Machine
PCM	Pulse Coded Modulation
PCMCIA	People Can't Memorize Computer Industries Acronyms (slang)
PCMCIA	Personal Computer Memory Card International Association (org.)
PCMS	Project & Configuration Management System
PCMT	Personal Computer Message Terminal
PCN	Personal Communications Network
PCN	Public Communications Network (mobile-systems)
PCNFS	Personal Computer Network File System
PCNOS	Personal Computer / Network Operating System (OS, MS-DOS, CP/M), "PC/NOS"
PCO	Point of Control and Observation (ISO 9646-1, IUT)
PCOIP	Personal Computer Over Internet Protocol (PC, IP), "PCoIP"
PCP	Primary Control Program (IBM, OS, OS/PCP)
PCP	Printer Control Protocol
PCPC	Personal Computers Peripheral Corporation (manufacturer)
PCR	Peak Cell Rate (UNI, ATM, SCR)
PCR	Platform Configuration Register (TPM)
PCR	Processor Configuration Register (Motorola, CPU)
PCR	Program Clock Reference
PCRAM	Phase-Change Random Access Memory (RAM, IC), "PC-RAM"
PCRE	Perl Compatible Regular Expression [library] (PERL)
PCRW	Phase Change ReWritable (DVD, EMCA), "PC-RW"
PCS	Personal Communication System (Sony, Panasonic, Motorola)
PCS	Personal Communications Services
PCS	Physical Coding Sublayer (PMA, PHY)
PCS	Programmable Communications Subsystem
PCS	Punched Card System (PC)
PCSA	Personal Computing Systems Architecture [= Pathworks] (DEC, NOS)
PCSC	Personal Computer / Smard Card (PC, PCMCIA), "PC/SC"
PCSD	Printer Control Sequence Description
PCSI	Pacific Communication Sciences, Inc. (manufacturer)
PCSS	Percentage-Closer Soft Shadows (Nvidia)
PCT	Parrot Compiler Tools
PCT	Private Communication Technology (Internet, MS, Visa)
PCT	Probe Control Table (FFST/2)
PCTCP	Personal Computer/Transmission Control Protocol, "PC/TCP" 
PCTE	Portable Common Tool Environment (CASE, ESPRIT)
PCTS	POSIX Compliance Test Suite (POSIX)
PCV	P-bit Coding Violation [error event] (DS3/E3, BIT)
PCV	Path Coding Violation [error event] (DS1/E1)
PCXT	Personal Computer - eXtended Technology, "PC-XT"
PD	Packetization Delay
PD	Plug & Display [standard] (LCD, VESA), "P&D"
PD	Public Domain
PD	police department
PDA	Personal Digital Assistant
PDA	public display of affection
PDB	Per-Domain Behaviour (Domain, Internet)
PDB	Professional Disk for Broadcast (Sony, BD)
PDC	PROLOG Development Center (manufacturer, Denmark, PROLOG)
PDC	Personal Digital Cellular [network] (GSM)
PDC	Power Disk Cartridge (ECMA)
PDC	Primary Domain Controller (MS, Windows NT, BDC)
PDD	PERL Design Document (PERL)
PDD	Professional Disk for Data (Sony, BD)
PDE	Partial Differential Equation
PDE	Personal Digital Entertainment
PDE	Plug-in Development Environment (Eclipse)
PDES	Product Data / Definition Exchange Standards (USA, STEP, CIM)
PDF	Portable Document Format (Adobe)
PDF	Program Development Facility (IBM)
PDFX	Portable Document Format / eXchange (PDF, CGATS, DTP), "PDF/X"
PDH	Plesiochronous Digital Hierarchy (ATM)
PDI	Power and Data Interface
PDK	Patterns Development Kit (WWW, IBM)
PDK	Peripheral Developers Kit (MS)
PDK	Portal Development Kit (SAP, EP)
PDL	PERL Data Language (PERL)
PDL	Page Description Language (printing)
PDL	Program Design Language
PDL	Program Development Language
PDLT	Process Dispatch Latency Time
PDM	Physical Data Model (DB, CDM, Powerdesigner)
PDM	Program Development Manager (IBM, ADT)
PDN	Programmer's Distribution Network (Fido)
PDN	Public Data Network (mobile-systems)
PDO	Portable Distributed Objects (NeXT)
PDOP	Positional Dilution Of Precision (GPS)
PDOS	Parallel and Distributed Operating System (OS, MIT)
PDP	Parallel Distributed Processing (AI)
PDP	Peripheral Data Processing
PDP	Plasma Display Panel
PDP	Programmable Data Processor (DEC)
PDQ	Parallel Data Query (Informix, DB)
PDQ	pretty darn quick
PDS	Partitioned Data Set
PDS	Portable Display Shell (Shell)
PDS	Processor Direct Slot / Socket (Motorola, Apple)
PDS	Professional Development System (MS)
PDS	Public Domain Software (PD)
PDS	please don't shout
PDSP	Peripheral Data Storage Processor
PDSS	Post Development and Software Support
PDT	Pacific Daylight Time [-0700] (TZ, PST, USA)
PDTB	Protected Digital Talking Book specification (DAISY)
PDTR	Proposed Draft Technical Report
PDU	Packet Data Unit
PDU	Product Development Unit
PDU	Protocol Data Unit (OSI)
PDV	Photorealistic Data Visualization
PDV	ProzessDatenVerarbeitung
PDW	Parallel Data Warehouse
PE	Phase Encoding
PE	Portable eXecutable (Win32, Java)
PE	Preinstallation Environment (MS, Windows, XP)
PE	Processing Element (MPP)
PEA	Pocket Ethernet Adapter (LAN, ethernet)
PEAK	Python Enterprise Application Kit (Python)
PEAP	Protected Extensible Authentication Protocol (EAP, WPA, WLAN)
PEAR	PHP Extension and Application Repository (PHP)
PEARL	Process and Experiment Automation Realtime Language
PEBCAK	Problem Exists Between Chair And Keyboard (slang)
PEBCAK	problem exists between chair and keyboard
PEBI	PEtaBInary [(2^10)^5] (IEC)
PEBKAC	Problem Exists Between Keyboard And Chair (telecommunication, Usenet, IRC)
PEBKAC	problem exists between keyboard and chair
PEBS	Precise Event Based Sampling (Intel, CPU)
PEC	Program Execution Control (IBM, OS/2)
PECI	Platform Environmental Control Interface (Intel)
PECL	PHP Extension Code Library (PHP, PEAR)
PED	Personen-Erkenntnis-Datei (police)
PEDS	Planning, programming, budget, and execution Electronic Delivery System
PEEK	Partners Early Experience Kit (Taligent)
PEF	Preferred Executable Format (CFM, Apple)
PEG	PCI Express for Graphics (PCIe, Intel)
PEG	Platform European Grid [conference] (grid)
PEL	Picture ELement
PEM	Privacy Enhanced Mail (PSRG, RFC 1421/1422/1423/1424)
PEM	Proton Exchange Membrane fuel cell
PEN	Public Education Network
PEP	Packetized Ensemble Protocol (Telebit)
PEP	Personal Employee Portal (IBM)
PEP	Personal Eventing Protocol (XMPP)
PEP	Personal Exam Prep (MS, ATEC)
PEP	Polymer Electronic Printing
PEP	Python Enhancement Proposal (Python)
PEP	Python Enhancement Proposal (Python)
PER	Packed Encoding Rules (ASN.1)
PER	Program Event Recording
PERCS	Productive, Easy-to use, Reliable Comouting Systems (IBM)
PERL	Pathologically Eclectic Rubbish Lister (slang)
PERL	Practical Extraction and Report Language (PERL), "Perl"
PERM	Pre-Embossed Rigid Magnetic (Sony, HDD)
PERM	Programmgesteuerte Elektronische Rechenmaschine Muenchen
PERMIS	PERManentes InventurabwicklungsSystem (MBAG)
PEROM	Programmable Erasable Read Only Memory (IC)
PERPOS	PERpetual Processing Operating System (OS, Unix)
PERT	Program Evaluation / Evolution and Review Technique
PES	P-bit Errored Seconds (DS3/E3, BIT)
PES	Packetized Elementary Stream (DVB, ISO, IEC 13818-2/13818-3)
PES	Photo-Electric Scanning (DTP)
PES	Programmed Electrical Stimulation
PES	Proposed Encryption Standard (cryptography)
PEST	Parameter Estimation by Sequential Testing
PET	Personal Electronic Translator
PET	Print Enhancement Technology (Compaq)
PET	Privacy Enhancement Technology
PET	Progressive Educational Technology
PEX	PHIGS Extension for X (X-Windows, PHIGS)
PFA	Parameter Field Address (Forth)
PFA	Predictive Failure Analysis (HDD)
PFC	Power Factor Correction
PFC	Priority-based Flow Control (IEEE 802.1Qbb, DCB)
PFC	Protocol Field Compression (PPP)
PFD	Primary Flight Display (Airbus, A380)
PFE	Page Fault Error (Windows, MS)
PFI	pay for inclusion
PFK	Program Function Key
PFM	Printer Font Metrics (Adobe)
PFN	Page Frame Number (Linux, VPFN)
PFPU	Processor Frame Power Unit
PFR	Portable Font Resource (Netscape)
PFRAM	Polymeric Ferroelectric Random Access Memory (RAM, IC)
PFS	Perfect Forward Secrecy (FS, cryptography)
PFS	Professional File System (Amiga, FS)
PFWG	[WAI] Protocols and Formats Working Group (WAI)
PFY	pimply faced youth
PGA	Patches Gratefully Accepted (slang, Cygwin, PTC)
PGA	Pin Grid Array (IC, CPU)
PGA	Professional Graphics Adapter (IBM)
PGC	ProGram Chain (DVD)
PGC	Professional Graphics Controller
PGD	Page Global Directory
PGFNA	Prince George Free-Net Association (org., USA)
PGI	Parameter Group Identifier (SPDU)
PGM	Practical General Multicast (Cisco, Multicast)
PGM	Pragmatic General Multicast (MS, Multicast)
PGML	Precision Graphics Markup Language (XML, IBM, Netscape, Sun, Adobe, SVG)
PGO	Profile Guided Optimization (Intel)
PGP	Pretty Good Privacy
PGS	Program Generation System
PHB	PCI Host Bridge (Power4, IBM)
PHB	pointy haired boss
PHBT	Pseudomorphic Heterojunction Bipolar Transistor
PHIGS	Programmer's Hierarchical Interactive Graphics System
PHIGSPLUS	PHIGS Plus Lumiere and Surfaces (PHIGS), "PHIGS-PLUS"
PHIPS	Professional High-Resolution Image Processing System (CA)
PHLAK	Professional Hackers Linux Assault Kit (Linux)
PHOTON	paneuropean PHOtonic Transport Overlay Network (ACTS)
PHP	PHP Hypertext Preprocessor (PHP/FI, HTML, CGI, successorr)
PHPFI	Personal Home Page [construction kit]/Form Interpreter (HTML, CGI, PHP, predecessor), "PHP/FI"
PHUN	Phreakers and Hackers Underground Network (network)
PHY	PHYsical Layer Control (FDDI)
PI	Placement and Interconnect [system] (VLSI, MIT)
PI	Portable Interceptor (CORBA)
PIA	Peripheral Interface Adapter
PIA	Plug-In Administrator
PIA	Primary Interop Assembly (VSTO, MS)
PIC	Personal Intelligent Communicator
PIC	Point in Call (IN)
PIC	Position Independent Code (DLL)
PIC	Primary Independent Carrier
PIC	Priority Interrupt Controller (IC)
PIC	Programmable Interrupt Controller (PIC)
PICC	Proximity Integrated Circuit Card (RFID)
PICG	PCTE Interface Control Group (org., PCTE)
PICMG	PCI Industrial Computer Manufacturers Group (org., PCI)
PICS	Platform for Internet Content Selection (org., Internet, POWDER)
PICS	Plug-in Inventory Control System
PICS	Protocol Implementation Conformance Statements
PICSDCPR	PICS Detailed Continuing Property Record, "PICS/DCPR"
PICU	Priority Interrupt Control Unit
PID	Packet IDentification (DVB)
PID	Process IDentification number (Unix)
PID	Protocol IDentifier [governing connection types]
PIE	Personal Interactive Electronics [division] (Apple)
PIE	Position Independent Executable
PIF	Parity Inner Failure (DVD)
PIFS	Point Coordination Function - InterFrame Space (MAC, 802.11a, PCF, IFS, WLAN)
PIG	Psion Interest Group (Psion)
PIIX	PCI IDE/ISA eXcelerator (Intel, IC, PCI, IDE, ISA)
PIKT	Problem Informant/Killer Tool (GNU, Linux)
PIL	Python Imaging Library (Python)
PILOT	Programmed Inquiry, Language Or Teaching (IBM)
PIM	Parallel Inference Machine (FGCS, AI)
PIM	Personal Information Manager / Management
PIM	Platform Independent Model (MDA)
PIM	Protocol Independent Multicast (ACM, Multicast)
PIMA	Photographic & Imaging Manufacturers Association (org., predecessor, I3C)
PIMB	PCTE Interface Management Board (org., PCTE)
PIMDM	Protocol Independent Multicast-Dense Mode [protocol] (PIM, ACM, Multicast), "PIM-DM"
PIMF	Paar [kabel] In MetallFolie (VDE, STP), "PiMF"
PIMS	Project Information Management System
PIMSM	Protocol Independent Multicast-Sparse Mode [protocol] (RFC 2117/2362, PIM, ACM, SM, Multicast), "PIM-SM"
PIN	Personal Identification Number (banking, ICC)
PIN	Personal Internet Name (RFC 3042)
PIN	Processor Independent Netware (Novell, HP, DEC, Apple, Sun)
PIN	personal identification number
PINE	Program for Internet News and Email / PINE Is No longer ELM
PINET	Physicians Information NETwork (network, USA)
PING	Packet InterNet Groper (ICMP, TCP/IP)
PINT	PSTN INTernet Interworking [group] (PSTN, IETF)
PIO	Parallel / Programmed Input/Output
PIOS	Personen, Institutionen, Objekte, Sachen (INPOL)
PIP	Packet Interface Port
PIP	Paper Impact Printing
PIP	Peripheral Interchange Program
PIP	Personal Information Processor
PIP	Picture In Picture (video)
PIP	Plug-In Protocol (ZOC)
PIPS	Parallel Information Processing System (GNU)
PIPS	Pattern Information Processing Systems
PIRA	Printing Industries Research Association (org.)
PIRQ	Peripheral Component Interconnect Interrupt ReQuest (PCI, IRQ)
PISA	Portable InformationsSystem Architecture (DB, infodas, PISA)
PISABG	PISA/Business Graphics (PISA), "PISA/BG"
PISADB	PISA/Data Base (PISA, DB), "PISA/DB"
PISADD	PISA/Data Dictionary (PISA), "PISA/DD"
PISADK	PISA/ ??? (PISA), "PISA/DK"
PISAMP	PISA/Menue Processor (PISA), "PISA/MP"
PISANT	PISA/ ??? (PISA), "PISA/NT"
PISAPPS	PISA/ProduktionsPlanung und -Steuerungssystem (PISA), "PISA/PPS"
PISAQL	PISA/Query Language (PISA), "PISA/QL"
PISARG	PISA/Report Generator (PISA), "PISA/RG"
PISN	Private Integrated Services Network (ECMA)
PISW	Process Interrupt Status Word (CPU, assembler)
PIT	Partition Information Table (Android)
PIT	Point In Time (DB)
PIT	Programmable Interval Timer
PITA	Pain In The Anatomy / Ass (slang, Usenet, IRC)
PITA	pain in the ass
PITR	{parent,parents} in the room
PIU	Path Information Unit (IBM, SNA)
PIU	Plug-In Unit
PIXEL	PIcture ELement
PIXEL	Pi Improved Xwindows Environment, Lightweight (Raspbian)
PIXIT	Protocol Implementation eXtra Information for Testing
PJL	Print Job Language (HP, PCL, printing)
PK	Public Key (cryptography)
PKARC	Phil Katz ARC
PKCS	Public Key Cryptography Standards (org., USA, cryptography)
PKI	Public Key Infrastructure (cryptography, Internet, ITU, PKI)
PKIX	Public Key Infrastructure X.509 (PKI, cryptography)
PKS	Polizeiliche KriminalStatistik (INPOL)
PKS	Public Key Server (PGP, GPG, SKS, HKS)
PKSP	pound keys and spew profanity
PKT	Partition Knowledge Table
PKWARE	Phil Katz softWARE (manufacturer)
PL	Physical Layer (ISO, OSI)
PLA	Program License Agreement (IBM)
PLA	Programmable Logic Array
PLATO	Programmed Logic for Automated Teaching Operations
PLB	Picture Level Benchmark (GPC)
PLBSI	Picture Level Benchmark Sample Implementation (GPC)
PLC	PowerLine Communications [adapter]
PLC	Programmable Logic Controller (IC)
PLCC	Plastic Leaded [/ Leadless] Chip Carrier
PLCP	Physical Layer Convergence Procedure / Protocol (UNI, DS-3)
PLD	Programmable Logic Device (IC, RL)
PLDA	Private Loop Direct Attach
PLDM	Power Line Disturbance Monitor
PLE	Personal Learning Edition (Maya)
PLE	Property List Editor (Apple, Macintosh)
PLED	Polymer Light Emitting Display (LED)
PLEX	Pilot License EXtension (MMORPG)
PLI	Programming Language One (DEC), "PL/I"
PLIP	Parallel Line Internet Protocol (IP), "PL/IP" 
PLL	Phase Locked Loop
PLM	Programming Language for Microcomputers
PLMN	Public Land Mobile Network (mobile-systems, GSM)
PLONK	Please Leave Our Newsgroup, Kid (Usenet, slang)
PLOU	Physical Layer Overhead Unit (UNI), "PL-OU"
PLP	Packet Layer Protocol (X.25)
PLP	Party Line Protocol
PLP	Presentation Level Protocol
PLRS	Power Line Remote Switch
PLS	Personal Library Systems (manufacturer)
PLS	PhysicaL Signaling
PLS	Programmable Logic Sequencer
PLT	Procedure Linkage Table
PLV	Presentation Level Video (DVI, Intel)
PM	Performance Management
PM	Peripheral Module
PM	Personal Message (BBS)
PM	Physical Medium
PM	Port Multiplier (SATA)
PM	Presentation Manager (OS/2)
PM	Privileged Mode (HP, MPE)
PM	Protected Mode (Intel, CPU)
PM	post meridiem
PMA	Physical Medium Attachment (PCS, PHY)
PMA	Policy Management Architecture (Netmanage, Internet)
PMA	Program Memory Area (CD)
PMAC	Packet Media Access Control (FDDI), "P-MAC"
PMAC	Peripheral Module Access Controller
PMBR	PIM Multicast Border Router (PIM, Multicast)
PMC	Print Management Console (MS, Windows, Vista)
PMC	Pseudo-Machine Code
PMC	[Zen] Portable Media Center
PMD	Page Middle Directory
PMD	Physical layer, Medium Dependant [sub-layer] (FDDI, UNI)
PMDRAM	Page Mode Dynamic Random Access Memory (RAM, DRAM, IC), "PM-DRAM"
PME	Pattern Matching Engine
PME	Power Management Event (BIOS)
PMFI	problem magically fixed itself
PMFJI	pardon me for jumping in
PMI	Product Manufacturing Information
PMIC	Power Management IC (IC, RDIMM)
PMJI	Pardon Me for Jumping In (slang)
PMK	Pairwise Master Key (RSN, cryptography)
PMMU	Paged Memory Management Unit
PMO	Program Management Office (Sun, JCP)
PMOS	Positive-channel Metal Oxide Semiconductor (IC)
PMP	Point to MultiPoint (UNI)
PMP	Preventive Maintenance Package (AIX, IBM)
PMPO	Peak Music Power Output
PMR	Poor Man's Routing
PMR	Problem Management Report (IBM)
PMS	Personal Mailing System
PMS	Processor Memory Switch
PMS	Project Management System
PMS	Public Message System
PMSL	pissing myself laughing
PMSP	Preliminary Message Security Protocol
PMT	Program Map Table (DVB)
PMT	Program Map Table (DVB, PAT)
PMTU	Path MTU Recovery (MTU, TCP/IP)
PMU	PowerMeter Unit
PMW	Project Manager Workbench
PMX	Packet MultipleXer (MUX)
PMX	Presentation Manager for the X window system, "PM/X" 
PNA	Personal Navigation Assistant (GPS, PDA)
PNG	Portable Network Graphics [format] (RFC 2083)
PNG	persona non grata
PNI	Prescott New Instruction set (Intel, Pentium)
PNNI	Private Network to Network Interface (ATM), "P-NNI"
PNNI	[phase 0] Public Network Node Interface [protocol] (ATM)
PNP	Plug 'N Play (PNP), "PnP"
PNP	plug and pray
PNPBIOS	Plug and Play Basic Input Output System (PNP, BIOS), "PnP BIOS"
PNPN	Positive Negative Positive Negative [devices]
PNRP	Peer-Name-Resolution-Protocol
PNS	PeaceNet Sweden (network)
PNW	Personal NetWare (Novell, Netware)
PO	Portable Object (MO)
POA	Portable Object Adapter (CORBA, .NET)
POACH	PC-On-A-Chip (PC)
POC	Proof of Concept
POC	Push to talk Over Cellular (GPRS), "PoC"
POC	point of contact
POC	proof of concept
POCSAG	Post Office Code Standard Advisory Group (org., SMS)
POD	Plain Old Document [format]
POD	Print / Publishing On Demand, "PoD"
PODA	Piloting of ODA (ESPRIT, SNI, Bull, TITN, ICL, Olivetti, ODA)
PODA	Priority Orientated Demand Assignment (MAC, TDM)
PODC	Principles Of Distributed Computing
POE	PERL Object Environment (PERL)
POE	Power Over Ethernet (LAN), "PoE"
POE	PowerOpen Association (Apple, IBM, Motorola, ..., org.)
POEM	Portable Object-orientated Entity Manager (SGML)
POEMS	Platinum Open Enterprise Management System
POEP	Primary Operand Execution Pipeline (Motorola, CPU), "pOEP"
POF	Parity Outer Failure (DVD)
POF	Plastic / Polymere Optical Fiber (OWG)
POGO	Programmer-Oriented Graphics Operation
POH	Path OverHead (SONET)
POI	Path Overhead Indicator (SONET)
POI	Point Of Information
POI	Point Of Interaction (IN)
POJI	Plain Old Java Interfaces (Java, POJO)
POJO	Plain Old Java Object (Java, POJI)
POL	Problem / Procedure / Process Oriented Language
POLA	principle of least astonishment
POLED	Plastic-OLED-Display (LG, OLED), "pOLED"
POLS	principle of least surprise
POM	Project Object Model (Maven)
PON	Passive Optical Network
POODLE	Padding Oracle On Downgraded Legacy Encryption (SSL)
POOL	Parallel Object Orientated Language (DOOM, OOP)
POOM	Pocket Outlook Object Model (MS)
POP	Package On Package, "PoP"
POP	Package for Online Programming
POP	Point Of Presence (Internet, ISP)
POP3	Post Office Protocol 3 (Internet, RFC 1939)
POR	Point Of Return (IN)
POR	Power-On Reset (BIOS)
POS	Piece Of Shit (slang, Usenet, IRC)
POS	Primary Operating System (OS, RCA Spectra 70)
POS	Professional Operating System (OS, DEC), "P/OS"
POS	Programmable Object Select
POS	point of sale
POSE	Palm Operating System Emulator (Palm)
POSI	Promoting conference for OSI (Japan, org., conference)
POSIX	Portable Operating System for unIX (OS, IEEE 1003, ISO 9945, PASC, Unix)
POST	Power-On Self-Test
POSYBL	PrOgramming SYstem for distriButed appLications
POT	Plenty of Torrents
POTS	Plain Old Telephone System (slang, Usenet, IRC)
POV	Persistence of Vision (raytracing)
POV	point of view
POWDER	Protocol fOr Web DEscription Resources (Org,, WG, W3C, PICS)
POWER	Power Optimization With Enhanced RISC [chip] (IBM, Apple, Motorola, RISC)
PP	Physical Partition (LVM)
PP	Physical Plane (IN)
PP	Pre-Processor
PP	Protection Profile (CC)
PPA	Parallel Port Adapter
PPA	Personal Package Archives (Linux, Ubuntu)
PPA	PicoPeeringAgreement (network)
PPAPI	Pepper Plugin API (WWW, Google, API)
PPB	Push Pull Before [recording] (DVD), "PPb"
PPBDV	Push Pull Before [recording] Disc Variation (DVD), "PPb DV"
PPC	PowerPC (Apple)
PPC	Program to Program Communication (Apple)
PPD	Postscript Printer Definition (DTP)
PPDS	Personal Printer Data Stream
PPDU	Presentation Protocol Data Unit (PDU, OSI, ISO 8823, OSI/RM)
PPE	Packet Processing Engine (Hub, router, IP)
PPE	Power Processor Element (IBM, Cell, SPE)
PPGA	Plastic Pin Grid Array (IC, CPU)
PPI	Parallel Port Interface
PPI	Pixels Per Inch
PPI	Programmable Peripheral Interface
PPID	Parent Process IDentification number (Unix)
PPK	Per Packet Key (FPK)
PPL	Pcboard Programming Language (BBS)
PPL	Polymorphic Programming Language (Harvard, Xerox, PARC)
PPL	people
PPL	pretty please
PPM	Pages Per Minute
PPM	Post Programmable Memory (Nokia)
PPM	Pulse Position Modulation (MMVF)
PPMI	PCI bus Power Management Interface (PCI)
PPMS	Professional Productivity Management System
PPN	Project Programmer Number
PPN	Public Packet Switching
PPOP	Plain Paper Optimized Printing (Canon), "P-POP"
PPP	Point-to-Point Protocol (Internet, PPP, RFC 1171/1661)
PPP	petty pet peeve
PPPD	Point-to-Point Protocol DAEMON (PPP)
PPPOE	Point-to-Point Protocol Over Ethernet [protocol] (ADSL, RFC 2516, PPP, ethernet), "PPPoE"
PPPOED	Point-to-Point Protocol Over Ethernet DAEMON (PPPoE), "PPPoED"
PPS	Packets Per Second
PPS	Parallel Processing System
PPS	ProduktionsPlanung und -Steuerung
PPS	Programmable Power Supply
PPS	Public Packet Switching [network]
PPS	pulse per second (signal)
PPSE	Proximity Payment System Environment
PPSN	Public Packet-Switched Network
PPSU	Personal Printer Spooling Utility
PPT	Package Power Tracking
PPTP	Point-to-Point Tunneling Protocol (MS, Ascend, IP)
PPU	Peripheral Processing Unit
PPU	Physical Processing Unit (Ageia)
PPVPN	Provider-Provisioned Virtual Private Network (VPN)
PQ	Perceptual Quantization (HDR, Dolby)
PQET	Print Quality Enhancement Technology (Lexmark)
PQFP	Plastic Quad Flat Package (CPU)
PR	Packet Radio
PR	Pattern Recognition
PR	Pentium Rating (AMD)
PR	Placement & Routing (RL, IC), "P&R"
PR	public relations
PRA	Purported Responsible Address [algorithm] (MS, SPAM)
PRACSA	Public Remote-Access Computer Standards Association (org., USA)
PRAM	Parameter Random Access Memory (RAM, IC, Apple), "P-RAM"
PRAM	Phase-change Random Access Memory (RAM, IC, Intel)
PRCS	Project Revision Control System (GNU)
PREP	PowerPC REferenz Plattform (IBM, Apple), "PReP"
PREPNET	Pennsylvania Research and Economic Partnership NETwork (network, USA), "PREPnet"
PRF	Physical Register File (CPU, Intel)
PRF	Problem Report Form (IBM)
PRI	Primary Rate Interface (ISDN)
PRI	Product Release Instructions (mobile-systems)
PRIDE	PRofitable Information by DEsign (IRM)
PRISM	PRogrammed Integrated System Maintenance
PRISM	Parallel Reduced Instruction Set Multiprocessing
PRISM	Portable, Reusable, Integrated Software Modules
PRL	Preferred Roaming List (CDMA)
PRMD	PRivate Management Domain (X.400, MHS)
PRML	Partial Response - Maximum Likelihood (HDD, HD-DVD)
PRN	Pseudo Random Noise [code] (GPS)
PRNG	Pseudo Random Number Generator
PRO	Precision RISC Organization (org.)
PROFIBUS	PROcess FIeld BUS
PROFS	PRofessional OFfice System (IBM, VM)
PROLOG	PROgramming in LOGic
PROM	Partial Read Only Memory (ROM), "P-ROM" 
PROM	Programmable Read Only Memory (ROM, IC)
PROMATS	PROgrammable Magnetic Tape System
PROPAL	PROgrammed PAL
PROS	??? [protocol]
PROTEL	PRocedure Oriented Type Enforcing Language
PRPQ	Programming Request for Price Quotation
PRS	Pattern-Recognition System (PR)
PRSM	Processor Resource/System Manager (IBM)
PRT	Portable Remote Terminal
PRT	Portal RunTime (SAP, EP)
PRT	Program Reference Table
PRTM	Printing Response Time Monitor
PS	Port Selector (SATA)
PS	PostScript (Adobe, PDL, printing)
PS	Power Supply
PS	PowerShell (MS, Windows)
PS	Privilege Service (DCE)
PS	Process Status (Unix)
PS2	Personal System /2, "PS/2" 
PS3	Playstation 3 (Sony)
PS4	Playstation 4 (Sony)
PSA	Python Software Activity (Python)
PSA 	prostate-specific antigen
PSA 	public service announcement
PSAP	Presentation Service Access Point (OSI, OSI/RM, SAP)
PSB	Processor System Bus (Intel, FSB)
PSB	Program Specification Block (IBM)
PSC	Pittsburgh Supercomputing Center (org., USA)
PSCNET	Pittsburgh Supercomputing Center NETwork (network, USA), "PSCnet"
PSD	Printer Sharing Device
PSD	Programmer's Supplementary Documents (BSD, Unix)
PSDC	Public Switched Digital Capability
PSDN	Packet-Switching Data Network
PSDS	Public-Switched Digital Service
PSE	Packet Switch Exchange
PSE	Port Switched Ethernet (Bytex, VLAN, ethernet)
PSES	P-bit Severely Errored Seconds (DS3/E3, BIT)
PSF	Permanent Swap File
PSF	Print Services Facility (IBM)
PSF	Python Software Foundation (org., Python)
PSG	Personal Systems Group (HP)
PSHDL	Plain Simple Hardware Description Language
PSI	Performance Systems International, inc.
PSI	Power Status Indicator (Intel, CPU)
PSI	Published Subject Indicator (XTM)
PSID	Presentation Space IDentifier (IBM)
PSIG	Platform Special Interest Group (SIG, OMG)
PSIPU	PostScript - Intelligent Processing Unit (Canon, Adobe, CLC), "PS-IPU"
PSIU	Packet Switch Interface Unit
PSK	Phase Shift Keying (telecommunication)
PSK	Pre-Shared Key (cryptography, PSS)
PSL	PD Service Lage (Haendler)
PSL	Public Software Library
PSLC	Parallel Sysplex License Charge (IBM, WLC)
PSM	Persistent Storage Manager (Maxtor)
PSM	Persistent Stored Modules (SQL)
PSM	Personal Scrum Master (Scrum)
PSM	Personal Security Manager (Mozilla, Internet, cryptography)
PSM	Personal Software Marketing (IBM)
PSM	Platform Specific Model (MDA)
PSN	Packet / Public Switched Network
PSN	Packet Sequence Number (OLSR)
PSN	Packet Switch Node (ARPANET, MILNET)
PSNR	Peak Signal to Noise Ratio
PSOM	Persistency framework in SOMobjects (IBM, DSOM)
PSOS	Portable Software On Silicon (RTOS), "pSOS"
PSOS	Provably Secure Operating System (OS)
PSP	Personal Software Products (IBM)
PSP	PlayStation Portable (Sony)
PSP	Program Segment Prefix (DOS)
PSP	ProjektStrukturPlan
PSPDN	Packet Switched Public Data Network (IN)
PSR	Phase Shift Register (IC)
PSR	Problem Steps Recorder (MS, Windows)
PSR	Program Support Representative
PSRG	Privacy and Security Research Group (IRTF)
PSRO	Professional Standards Review Organization
PSS	Packet Switch Services / Stream
PSS	Pre-Shared Secret (cryptography, PSK, WLAN)
PSSF	Personal System Support Family (IBM)
PST	P-State Transitions (CPU)
PST	PWM Sharing Technology (Arctic Cooling)
PST	Pacific Standard Time [-0800] (TZ, PDT, USA)
PST	Program Structure Tree
PSTN	Public Switched Telephone Network (IN)
PSU	Portable Storage Unit
PSU	Primary Sampling Unit
PSU	Program Storage Unit
PSVR	PlayStation Virtual Reality (VR)
PSW	Program Status Word
PT	Pass Through (HTTPD, Apache)
PT	Payload Type (ATM)
PTA	parent-teacher association
PTAL	Payment Transaction Application Layer (Internet, banking)
PTAT	Private Trans-Atlantic Telecommunications
PTB	Physikalisch-Technische Bundesanstalt Org., Germany
PTC	Pacific Telecommunications Council (org.)
PTC	Parallel Test Component (ISO 9646-3, TTCN)
PTC	Patches Thoughtfully Considered (slang, Cygwin, PGA)
PTD	Parallel Transfer Disk / Drive
PTE	Packet Transport Equipment
PTE	Page Table Entry
PTE	Path Terminating Equipment (SONET)
PTERM	Physical TERMinal (IBM), "PTerm"
PTF	Program Temporary Fix (IBM)
PTH	Plated-Through-Hole
PTI	Page Table Isolation (OS)
PTI	Payload Type Identifier (ATM, PT)
PTI	Polskie Towarzystwo Informatyczne (org., Poland)
PTK	Pairwise Transient Key (RSN, cryptography)
PTM	Packet Transfer Mode (ATM)
PTMP	Point to MultiPoint [communication]
PTMSC	Point-To-Multipoint Service Center (GPRS, mobile-systems, Multicast), "PTM-SC"
PTO	Patent and Trademark Office (org., USA)
PTO	parent-teacher organization
PTO	please turn over
PTO	power takeoff
PTO	{paid,personal} time off
PTOCA	Presentation Text Object Content Architecture (IBM, MO:DCA)
PTOS	Paper Tape Operating System (OS)
PTP	Paper Tape Punch
PTP	Picture Transfer Protocol (PIMA 15740)
PTR	Paper Tape Reader
PTS		Presentation Time Stamp (MPEG)
PTS	Package Tracking System (Debian)
PTS	Parallel Transaction System (IBM)
PTS	Protocol Type Selection (ISO)
PTSS	People's Time Sharing System (OS, CDC 6600)
PTT	Postes, Telegraphe et Telephone (org., Switzerland)
PTTP	Point-to-PoinT Tunneling Protocol
PTV	parental tunnel vision
PTW	Primary Translation Word
PTY	Pseudo-Terminal driver
PU	Physical Unit (NAU)
PU	Power Unit
PU	Processing Unit
PUA	Potentially Unwanted Apps
PUA	Private Use Area (UCS)
PUA	Profiling User Agent
PUB	Physical Unit Block
PUC	Peripheral Unit Controller
PUC	Public Utilities Commission
PUCP	Physical Unit Control Point (IBM, SNA)
PUE	Power Usage Effectiveness
PUEL	Personal Use and Evaluation License (Oracle)
PUFFT	Purdue University Fast FORTRAN compiler (FORTRAN)
PUGS	Perl6 User Golfing System (PERL)
PUID	Physical Unit IDentifier (IBM)
PUK	Personal / PIN Unblocking Key (PIN)
PUMA	Power User's Macintosh Association (org., Apple)
PUMA	Processor Upgradable Modular Architecture
PUMA	Programmable Universal Machine for Assembly (Unimation)
PUMA	Programmable Universal Micro Accelerator
PUMA	Protected User-Mode Audio (MS, WPE)
PUMS	Physical Unit Management Services
PUP	PARC Universal packet Protocol (PARC)
PUP	Product UPgrade (MS)
PURL	Persistent Uniform Resource Locator (URL, WWW)
PUT	Program Update Tape
PV	Physical Volume (LVM, HDD)
PVA	Packetized Video Audio
PVA	Patterned Vertical Alignment (LCD, Sun, Samsung, MVA)
PVC	Permanent Virtual Circuit (SVC)
PVC	Permanent Virtual Circuit / Channel / Connection (ATM)
PVCC	Permanent Virtual Channel Connection (ATM)
PVCS	Polytron Version Control System
PVD	Primary Volume Descriptor (CD, IS 9660)
PVE	Player Versus Environment (MMORPG, PvP), PvE
PVFS	Parallel Virtual File System
PVITL	Program-Variation-In-The-Large (SCM)
PVITS	Program-Variation-In-The-Small (SCM)
PVM	Parallel Virtual Machine (SMP, Cluster)
PVN	Private Virtual Network
PVP	Packet Video Protocol
PVP	Player Versus Player (MMORPG, PvE), PvP
PVP	Protected Video Path (MS, WPE)
PVPC	Permanent Virtual Path Connection (ATM)
PVQ	Perceptual Vector Quantization
PWA	Progressive Web Apps (WWW)
PWB	Printer Wire Board
PWB	Programmers Work Bench (MS)
PWD	Print Working Directory (Unix)
PWG	Printer Working Group (org., IPP, printing)
PWM	Pulse Width Modulation (DVD)
PWN	Peacenet World News
PWP	Phase Wobble Pre-pit (DVD)
PWSCS	Programmable WorkStation Communication Services
PWV	Pulse-Wave Velocity
PXE	Preboot eXecution Environment (Intel)
PY	Person Years
PZDF	Phil Zimmermann Defense Fund (PGP)
PZE	PersonalZeitErfassung
QA	Quality Assurance
QA	Question & Answers, "Q&A"
QA	Quick Arbitration (HD)
QAM	Quadrature Amplitude Modulation (HiperLAN/2, 802.11a)
QAP	Quality-Assurance Program (QA)
QAPI	Quality-Assurance Program Inspections (QA)
QAPI	Queue Application Program Interface (SAP, API)
QAPP	Quality-Assurance Program Plan (QA)
QAS	Quasi-Associated Signaling
QAT	Quick Assist Technology (Intel)
QBASIC	Quick Beginner's All-purpose Symbolic Instruction Code (BASIC, DOS)
QBBS	Quick Bulletin Board System (BBS)
QBE	Query By Example (DB)
QBF	Query By Forms (DB)
QBH	Query By Humming (DB, audio), "QbH"
QBIC	Query By Image Content (IBM)
QBS	Query By Struct (DB)
QC	Quad Core (CPU)
QCA	Quantum-dot Cellular Automata
QCB	Queue Control Block
QCDP	Quality Color Dithering Modus
QCIF	Quarter Common Interchange Format [176 x 144]
QCIF	Quarter Common Intermediate Format [176x144] (video)
QCM	Quad Core Modul (IBM, DCM)
QCT	Quanta Cloud Technologies
QD	Queueing Delay
QDEF	Quantum Dot Enhancment Film (3M)
QDL	Quadri Data Layer [CD] (CD)
QDOS	Quick and Dirty Operating System (OS, PC, MS-DOS, predecessor)
QDP	Quad-Die -Package
QDR	Quad Data Rate (SDR, GDR, ODR)
QED	quod erat demonstrandum
QEMM	Quarterdeck Expanded Memory Manager (EMM, Quarterdeck)
QEMU	Quick EMUlator (Linux)
QF	Query Filter (DB)
QFA	Quick File Access
QFE	Quick Fix Engineering (MS)
QFHD	Quad Full High Definition
QFP	Quad Flat Pack
QFT	quoted for truth
QHD	Quarter High Definition [640x360], [960x540] (HD)
QIC	Quarter Inch Committee (org., Streamer)
QICSC	Quarter Inch Cartridge Standards Committee (QIC)
QICW	Quarter Inch Cartridge Wide (QIC)
QIS	Quality Information System
QL	Query Language
QLC	Quadruple Level Cell (Flash)
QLD	Queuing Literature Database (DB)
QLI	Query Language Interpreter
QLLC	Qualified Logical Link Control [protocol] (IBM)
QMB	Quad Band Memory (IC)
QMC	Quine McCluskey approach
QMF	Query Management Facility (IBM)
QML	Qt Meta / Modeling Language
QMR	Quarterly Maintenance Releases (Lotus)
QMS	Queue Management Service (Netware)
QOS	Quality Of Service (ATM, CLR, CTD, CDV), "QoS" 
QP	Queue Pair (Infiniband, HCA)
QPA	Quality Program Analysis
QPE	Qtopia Palmtop Environment (PDA)
QPEL	Quarter PixEL (DivX, video), "QPel"
QPI	Quick Path Interconnect
QPI	Quick Path Interface
QPL	Q Public License
QPS	Quark Publishing System (DTP)
QPSK	Quadri Phase Shift Keying [modulation] (HiperLAN/2, , 802.11a)
QPSX	Queue Packet and Synchronous circuit Exchange
QPU	Quick Pascal Units (MS)
QR	Quick Response [code]
QSA	Qt Script for Applications
QSA	Query String Append (HTTPD, Apache)
QSAM	Queued Sequential Access Method (SAM)
QSU	Quatech Serial to USB [adapter] (USB)
QSVGA	Quarter SVGA [400x300] (SVGA, VGA)
QSXGA	Quad Super XGA [2560x2048] (XGA)
QTAM	Queued Terminal Access Method
QTC	Quantum Tunneling Composite [polymer]
QTE	Quick-Time-Event
QTVR	QuickTime Virtual Reality (Apple, VR)
QUEST	Quality Excellence for Suppliers of Telecommunication Leadership (org.), "QuEST"
QUEX	Query Update by EXample
QUHD	Quad Ultra HD [15360x8640] (HD)
QUIC	Quick UDP Internet Connections (UDP, Google)
QUICC	QUad Integrated Communications Controller (Motorola)
QUIP	QUad In-line Package
QUIPS	QUality Improvements Per Second
QUXGA	Quad Ultra XGA [3200x2400] (XGA, HSVGA)
QVGA	Quarter Video Graphics Array [320 x 240] (VGA)
QWAVE	Quality Windows Audio Video Experience (MS, Windows)
QWUXGA	Quad Wide Ultra XGA [3840x2400] (XGA, WQUXGA)
QXGA	Quantum Extended Graphics Array [2048 x 1536]
QXI	Queue eXecutive Interface
RA	Real Address (Power4, IBM, CPU)
RA	Registration Authority (PKI, ITU, cryptography)
RA	Remote Access (BBS)
RA	residential advisor
RABF	Redundant Accumulative Backhitchless Flush (IBM, Streamer)
RAC	Random Access Channel (HiperLAN/2)
RAC	Real Application Cluster (Oracle)
RACE	Research and technology development in Advanced Communications technologies in Europe (Europe, predecessor, CORDIS)
RACE	Rowbased ASCII Compatible Encoding (ASCII, Internet, VeriSign/NSI)
RACER	Renamed Abox and Concept Expression Reasoner
RACF	Resource Access Control Facility (IBM, MVS/ESA)
RACH	Random Access CHannel (GSM, CCCH, mobile-systems)
RAD	Rapid Access Disk
RAD	Rapid Application Development [toolkit] (Delphi, Borland)
RAD	Research And Development [data communications] (manufacturer)
RADIUS	Remote Authentication Dial-In User Service (RFC 2865)
RADSL	Rate Adaptive Digital Subscriber Line (ADSL)
RAFF	Rotary Acceleration Feed Forward (WD, HDD)
RAI	Remote Alarm Indication (DS3/E3)
RAID	Redundant Array of Independent / Inexpensive Disks (HDD, RAID)
RAIDIOS	RAID I/O Steering (Intel, RAID)
RAII	Resource Acquisition Is Initialization
RAIR	Random Access Information Retrieval
RAL	ReichsAusschuss fuer Lieferbedingungen (IEC 12119)
RAL	Rutherford Appleton Laboratory (org., UK)
RAM	Random Access Memory (RAM, IC)
RAM	Rarely Adequate Memory (slang)
RAM	Rate Adaptive Mode (DSL)
RAMDAC	Random Access Memory Digital to Analog Converter (RAM)
RAMIS	Rapid Access Management Information System
RAMP	Remote Access Maintenance Protocol
RAMPS	Reliability, Availability, Manageability, Performance and Scalability (DB)
RAMPS	Reprap Arduino Mega Pololu Shield (Arduino)
RAMS	Record Archival Management System
RAN	Radio Access Network
RAND	Rural Area Network Design
RAP	Remote Access Point
RAP	Rich Ajax Platform (RCP, Eclipse)
RAP	[internet] Route Access Protocol (RFC 1476, Internet)
RAPID	Resource And Performance Interactive Display system
RAPS	Real Application on Parallel Systems
RARE	Reseaux Associes pour la Recherche Europeenne (org.)
RARP	Reverse Address Resolution Protocol (Internet, RFC 903)
RAS	Reliability, Availability and Serviceability (IBM)
RAS	Remote Access Software
RAS	Row Address Strobe (IC, DRAM)
RAT	Register Allocation Table (Intel, CPU)
RAT	Remote Access Tool
RAT	Remote Access Trojan
RATP	Reliable Asynchronous Transfer Protocol (RFC 916)
RATS	Radio-Amateur Telecommunications Society (org., USA)
RATS	Rough Auditing Tool for Security (WWW, CGI, PERL, PHP,...)
RAVE	Relational Advanced Visual Environment
RAW	Read-After-Write (WAW, WAR)
RBA	Relative Byte Address
RBAC	Role Based Access Control (SELinux)
RBBS	Remote Bulletin Board System (BBS)
RBE	Rust By Example
RBF	Random Block Filemanager (OS-9)
RBH	Remote Bridge Hub
RBL	Realtime Blackhole / Block List (Internet, SPAM)
RBM	Realtime Batch Monitor (OS, Xerox)
RBMS	Remote Bridge Management Software
RBOC	Regional Bell Operating Company (USA)
RC	Reconfigurable Computer / Computing (RL)
RC	Region Co-ordinator (FidoNet)
RC	Release Candidate (MS)
RC	Return Code (REXX, ...)
RC	Routing Control
RC2	Rivest Cipher / Ron's Code 2 (cryptography)
RC4	Rivest Cipher / Ron's Code 4 (cryptography)
RC5	Rivest Cipher 5 (RFC 2040, cryptography)
RCAS	Reserve Component Automation System
RCC	Radio Common Carrier
RCC	Regional Control Center
RCC	Remote Cluster Controller
RCC	Routing Control Center
RCD	Receiver-Carrier Detector
RCE	Regional Code Enhancement (DVD)
RCE	Resident Command Extension (DOS)
RCF	Reader's Comment Form (IBM)
RCF	Remote Call-Forwarding
RCGI	Remote Common Gateway Interface (CGI, WWW, Novell)
RCL	Runtime Control Library
RCM	Remote Carrier Module
RCP	Remote Copy Program
RCP	Rich Client Platform (Eclipse, Java)
RCS	Reloadable Control Storage
RCS	Remote Connection Service (IBM, OS/2, LAN)
RCS	Resource Construction Set
RCS	Revision Control System (Unix, CM, GNU)
RCS	Rich Communications Services (GSM, mobile-systems)
RCTC	Rewritable Consumer Time Code (video)
RCTL	Resistor-Capacitor-Transistor Logic
RCW	Runtime Callable Wrapper (.NET, COM, DLL)
RD	Receive Data (MODEM)
RD	Recursive Design (CASE)
RD	Remove Directory (DOS, OS/2)
RD	Research and Development, "R&D"
RD	Route Descriptor
RDA	Remote Database Access (ISO, OSI)
RDB	Receive Data Buffer
RDB	Relational DataBase (DB)
RDB	Rigid Disk Block (Amiga, Commodore)
RDBMS	Relational DataBase Management System (DBMS, DB)
RDBMSMIB	Relational DataBase Management System - Management Information Base (DB), "RDBMS-MIB" 
RDC	Remote Data Connector
RDD	Random Digital Dial
RDD	Replaceable Database Driver (Clipper, CA-VO, DB)
RDDL	Resource Directory Description Language (XHTML, XML)
RDE	Received Data Enable
RDE	Redundant Data Elimination (Falconstor, VTL)
RDE	Ruby Development Environment (Ruby, IDE)
RDES	Remote Data Entry System
RDF	Rate Decrease Factor
RDF	Record Definition Field
RDF	Resource Description Framework (XML, IBM, Netscape, MS, ..., WWW)
RDFS	Resource Description Framework Scheme (RDF)
RDH	RSA-DES-Hybridverschluesselung (cryptography, HBCI)
RDI	Remote Defect Identification / Indicator (UNI)
RDIMM	Registered Dual Inline Memory Module (DIMM, IC)
RDL	Relational Database Language (DB)
RDL	Remote Digital Loopback
RDLAP	Radio Data Link Access Protocol (MODACOM), "RD-LAP"
RDM	Relational Data Modeler
RDM	Reliably Delivered Message
RDMA	Remote Direct Memory Access (VI, Infiniband)
RDN	Relative Distinguished Name (X.500)
RDNCRC	Research Data Network Cooperative Research Centre (org., Australia)
RDO	Remote Data Objects (DB)
RDO	Resource Definition Online (CICS, IBM)
RDP	Reliable Datagram Protocol
RDP	Remote Desktop Protocol (MS)
RDP	Remote Display Protocol (MS, Windows NT, ASP)
RDQL	Resource Description Query Language (RDF, HP, Java)
RDR	Remote Data Recovery (Ontrack)
RDR	Request Data with Reply (Feldbus)
RDRAM	Rambus Dynamic Random Access Memory (RAM, IC, Rambus)
RDRN	Rapidly Deployable Radio Networks (USA, Uni Kansas)
RDS	Radio Digital System
RDS	Rapid Development System (DB, Informix)
RDS	Remote Data Services
RDSN	Region Digital Switched Network
RDT	Radio Digital Terminal
RDT	Restricted Data Transmissions
RDTP	[secure] Raw Data Transfer Protocol
RE	RAID Edition (WD, RAID)
RE	Recommendation Engine (OP, Oracle, DB)
RE	Research and Engineering, "R&E"
REACH	Research and Educational Applications of Computers in the Humanities
READ	Relative Element Address Designate (cryptography)
READSL	Reach Extended Asymmetric Digital Subscriber Line (ADSL, DSL), "RE ADSL"
REBOL	Relative Expression Based Object Language
REFS	Resilient File System (MS, FS), "ReFS"
REGEX	REGular EXpressions (GREP, EMACS, ...)
REGIS	REmote Graphics Instruction Set
REGTP	REGulierungsbehoerde fuer Telekommunikation und Post Org., Germany, "RegTP"
REHMUDI	REdHat MUltimedia Distribution (RedHat, Linux), "ReHMuDi"
REM	Remote Equipment Module
REM	Ring Error Monitor
REMIS	Real Estate Management Information System
REMOS	Resources Management On-Line System
REPL	Read Eval Print Loop
RERAM	Resistive Random Access Memory (RAM, IC), "ReRAM"
RES	Remote Entry Services
REST	REpresentational State Transfer (URL, AWS)
RESTENA	RESeau Teleinformatique de l'Education NAtionale et de la recherce (network, Luxembourg)
RET	Report Engine Technology (CA, DB)
RET	Resolution Enhancement Technology (HP), "REt"
RETM	Rare Earth / Transition Metal (MO), "RE/TM"
REXX	Restructured EXtended eXecutor [language] (IBM, SAA, ANSI)
RF	Radio Frequency (mobile-systems)
RF4CE	Radio Frequency 4 Consumer Electronics
RFA	Request for Assistance (Internet)
RFB	Remote FrameBuffer [protocol]
RFC	Remote Function Call (SAP, CPIC)
RFC	Request For Change (PERL, ITIL)
RFC	Request For Comments (Internet, RFC)
RFC	request for comments
RFD	Ready-For-Data
RFD	Report Fragmentation Done [bit] (CATNIP, BIT)
RFD	Request For Discussion (Internet, Usenet), "RfD"
RFD	request for discussion
RFE	Request For Enhancement (Internet)
RFE	request for enhancements
RFI	Radio Frequency Interference
RFI	Remote File Inclusion
RFI	Request For Information (Internet)
RFIC	Radio Frequency Integrated Circuit (IC)
RFID	Radio Frequency IDentification (ANSI, NCITS)
RFMS	Remote File Management System
RFNM	Request For Next Message (IMP)
RFOG	Radio Frequency Over Glass (HFC, ANSI/SCTE 174 2010), "RFoG"
RFP	Request For Proposal (Internet)
RFP	Request for Package (Linux, Debian)
RFQ	Request for Quatation
RFS	REXX File System (REXX, CICS, VSAM, IBM)
RFS	Remote File Sharing (AT&T, Unix)
RFS	Remote File System
RFS	Remote Forensic Software
RFS	Request For Sponsor (Linux, Debian)
RFT	Request For Technology (OSF)
RFT	Revisable Form Text
RFTS	Remote File Transfer System (DDVS)
RGB	Rot Gruen Blau / Red Green Blue (color system, DTP)
RGBA	Red Green Blue Alpha-[byte] (color system, RGB)
RGBE	Red Green Blue Emerald (color system, photo, Sony)
RGMII	Reduced Gigabit Media Independent Interface
RGMS	Rotated Grid MultiSampling (graphics)
RGP	Raster Graphics Processor
RGP	Remote Graphics Processor
RH	Request Header
RHCE	Red Hat Certified Engineer (RedHat, Linux)
RHCT	Red Hat Certified Technician (RedHat, Linux)
RHCX	Red Hat Certified eXaminer
RHEL	Red Hat Enterprise Linux (Linux, RedHat)
RHS	Right Hand Side (NGSCB, MS, Palladium)
RHSCL	Red Hat Sofetware CoLection (Linux, Red Hat)
RI	Reference Implementation (JCP)
RI	Ring Indicator (RS-232, MODEM)
RI	Routing Information
RIA	Rich Internet Application (WWW, Macromedia)
RIACS	Research Institute for Advanced Computer Science (org.)
RID	Relative IDentifier (AD, SID, ACL)
RIDE	Research Issues in Data Engineering (IEEE-CS)
RIE	Reactive Ion Etching (IC)
RIF	Requirements Interchange Format (HIS)
RIF	Routing Information Field (Token Ring)
RIFF	Resource Interchange File Format (MS, IBM, MM)
RIG	Related Interest Group
RIG	Rochester Intelligent Gateway (OS)
RII	Routing Information Indicator
RIM	Registry Information Model (ebXML)
RIM	Remote Installation and Maintenance
RIME	Relaynet International Message Exchange
RIML	Renderer Independent Markup Language (XML, Consensus)
RIMM	Rambus Inline Memory Module (Rambus, IC)
RINEX	Receiver INdependent EXchange [format] (GPS)
RIO	Redistributed Internet Objects (S3, VRML, Internet)
RIO	Remote Input/Output (Power4, IBM)
RIOCP	??? (OS), "RIO/CP "
RIP	Raster Image Processor (DTP)
RIP	Remote Imaging Protocol (BBS)
RIP	Return Instruction Pointer (CPU, RAM)
RIP	Routing Information Protocol (BSD, IGP, RFC 1721, IP)
RIP	rest in peace
RIPE	Reseaux IP Europeenne (Europenet)
RIPL	Remote Initial Program Load (IBM)
RIPN	Russian Institute for Public Networks (org.)
RIPNG	Routing Information Protocol Next Generation (RIP, IPV6, RFC 2080), "RIPng"
RIPS	Raster Image Processing Systems corporation (manufacturer)
RIR	Regional Internet Registry (Internet)
RIS	Remote Installation Service (MS, ADS)
RISC	Reduced Instruction Set Code (CPU)
RISC	Research Institute for Symbolic Computation (org., Austria)
RISC	Risk and Incident Sharing and Coordination (IETF, OpenID)
RISCOS	RISC Operating System (MIPS, Acorn, OS), "RISC OS"
RISLU	Remote Integrated Services Line Unit
RISS	[StorageWorks] Reference Information Storage System (HP)
RITECH	Resolution Improvement TECHnology (Epson)
RITSEC	Regional Information Technology and Software Engineering Center
RJ45	Registered Jack 45 (cable)
RJE	Remote Job Entry (IBM, Internet, RFC 407)
RJEF	Remote Job Entry Function
RJP	Remote Job Processing
RKO	RootKey Operator (DNS)
RKRM	ROM Kernel Reference Manual (Amiga, Commodore)
RL	Real Life (telecommunication, Usenet, IRC)
RL	Reconfigurable Logic (RL)
RL	real life
RLC	Radio Link Control (GPRS, mobile-systems)
RLC	rod length check
RLDRAM	Reduced-Latency Dynamic Random Access Memory (RAM, DRAM, IC)
RLE	Run-Length Encoded
RLIN	Research Libraries Information Network (network)
RLL	Run Length Limited [encoding]
RLM	Redundant Lock Manager (GFS)
RLN	Remote LAN Nodes (LAN)
RLP	Radio Link Protocol (GSM, mobile-systems)
RLP	Resource Location Protocol (Internet, RFC 887)
RLPR	Remote Line Printing Request (LPR, printing)
RLS	Read Link error Status (FCP)
RLS	Received Line Signal
RLSD	Received Line Signal Detector
RLSFB	Read Last Spool File Buffer (IBM, VM/ESA, CP)
RLT	Remote Line Test
RLV	RingLeitungsVerteiler
RM	Resource Management
RM	Retention Module
RMA	Remote Memory Access
RMAS	Remote Memory Administration System
RMATS	Remote Maintenance Administration and Traffic
RMC	Rambus Memory Controller (Rambus)
RMC	Rational Method Composer (RUP, IBM)
RMCOS	Ryan-McFarland COBOL (????) Operating System (OS, COBOL), "RM/COS"
RMCP	Remote Management Control Protocol
RMF	Resource Measurement Facility (IBM, MVS)
RMI	Remote Method Invocation (Java, API)
RMIC	Remote Memory In Cassette (IBM, Streamer, WORM, MIC), "R-MIC"
RMM	Ring Management Module (Token Ring)
RMODP	Reference Model - Open Distributed Processing (RUP), "RM-ODP"
RMON	Remote MONitoring
RMOS	Realtime Multitasking Operating System (SNI, OS)
RMS	Reason Maintenance System (AI)
RMS	Reliant Monitor Services (FSC)
RMS	Remote Monitoring System [bus]
RMS	Richard Matthew Stallman
RMS	Richard Matthew Stallman (FSF, EMACS)
RMS	Rights Management Services (MS, Windows, NGSCB)
RMT	REXXware Migration Tool (Simware, REXX)
RMT	Raw Magnetic Tape (Unix)
RMT	Reliable Multicast Transport (IETF, WG, Multicast)
RMT	Ring ManagemenT (FDDI, SMT)
RMX	Reverse Mail eXchange (DNS, SPAM)
RNA	Remote Network Access
RNC	Radio Network Controller (mobile-systems, UMTS, RAN)
RND	RAD Network Devices (RAD, manufacturer)
RNG	Random Number Generation
RNI	Raw Native Interface (MS, Java)
RNID	Request Node IDentification (FCP, SNIA, HBA, API)
RNM	Resistors Network Method (audio)
RNOC	Regional Network Operations Center
RNPRSFP	Read Next PRint Spool File Block (IBM, VM/ESA, CP)
RNPUFSB	Read Next PUnch Spool File Block (IBM, VM/ESA, CP)
RNR	Receive Not Ready (LAPB)
RNSB	Read Next Spool Buffer (IBM, VM/ESA, CP)
RNUI	Remote Network User Identification (Datex-P)
RO	Read-Only (I/O)
ROAMS	Reusable Object Access and Management System
ROBOT	Return Of Bleichenbacher's Oracle Threat (TLS, RSA)
ROC	RAID On a Chip (RAID)
ROC	Reconstruction Of Color (ICE, Scanner)
ROCA	Return Of the Coppersmith Attack (RSA, TPM)
ROCF	Remote Object Class Factory
ROCM	Radeon Open CoMpute (AMD), "ROCm"
ROD	Rewritable Optical Disk (OD)
RODC	Read-Only Domain Controller (MS, AD)
ROFL	Roar Out From Laughing (slang, Usenet, IRC)
ROFL	rolling on floor laughing
ROFLMAO	rolling on floor laughing my ass off
ROHC	RObust Header Compression (RFC 3095/3759, RTP, UDP, ESP)
ROHS	Restriction Of the use of certain Hazardous Substances in electrical and electronical equipment (Europe), "RoHS"
ROI	return on investment
ROLAP	Relational OnLine Analytical Processing (OLAP, DB)
ROLC	Routing Over Large Clouds
ROM	Read Only Memory (ROM)
ROMB	RAID On MotherBoard (RAID)
ROMBIOS	Read-Only Memory - Basic Input Output System (ROM, BIOS), "ROM-BIOS"
ROMC	Required Operational Messaging Characteristics
ROMP	Research Office products division MultiProcessor (IBM, AIX)
ROP	Raster Operation Processor (GPU)
ROP	Remote Operations Service (IBM, OS/2)
ROP	Return Orientated Programming
ROPO	Research Online, Purchase Offline
ROS	Read-Only Storage
ROS	Resident Operating System (OS)
ROS	Robot Operating System (OS)
ROSE	Remote Operations Service Element (OSI, RPC)
ROSE	[CAE] Real-time Object-based Simulation Environment
ROT	Running Object Table (MS, Windows)
ROTFL	Rolling On The Floor Laughing (slang, Usenet, IRC)
ROTFL	rolling on the floor laughing
ROTFLBTC	Rolling On The Floor Laughing and Biting The Carpet (slang, Usenet, IRC)
ROTFLMAO	Rolling On The Floor Laughing My Ass Off (slang, Usenet, IRC)
RP	Rapid Prototyping (CNC, CAD)
RP	Relay Party (IRC)
RP	Rendezvous Point (PIM, Multicast)
RP	responsible person
RPA	Remote Phrase Authentication
RPC	Region Playback Control (DVD)
RPC	Remote Procedure Call (Sun, Xerox, OSF, ECMA, RFC 1831)
RPC2	Region code Playback Control phase 2 (DVD), "RPC-2"
RPCL	Remote Procedure Call Language (ONC, Sun)
RPCS	Refined Printing Command Stream (Ricoh)
RPDFP	Remote Physical Device Finger Printing (NAT, IP)
RPE	Remote Peripheral Equipment
RPELTP	Regular Pulse Excitation with Long-Term Prediction [loop] (LPC), "RPE-LTP"
RPF	RePeat active File (IBM, VM/ESA, CP)
RPF	Rendezvous Point Forwarding (PIM, MSDP, Multicast, RP)
RPF	Reverse Path Forwarding (PIM, Multicast)
RPG	Report Program Generator (IBM)
RPG	Role Playing Game
RPL	Remote Program Load
RPL	Requested Privilege Level
RPL	Resident Programming Language
RPM	Radio Packet Modem (Motorola)
RPM	Redhat Package Manager (Linux)
RPM	Remote Port Module (Ascend)
RPMA	Random Phase Multiple Access (IoT, LP-WAN)
RPN	Reverse Polish Notation
RPP	Relative Processor Performance (CPU, Cray)
RPS	Read Port Status (FCP)
RPS	Realtime Programming System (OS, IBM)
RPZ	Response Policy Zone (DNS, BIND)
RQBE	Relational Query By Example (DB, QBE)
RR	Radio Resource management (MM, CM, GSM, mobile-systems)
RR	railroad
RRAS	Routing and Remote Access Service (MS, Windows NT)
RRCM	Reservation Request Control Mechanism (DQDB)
RRDS	Relative Record Data Set (VSAM)
RRIP	Rock Ridge Interchange Protocol (CD, Unix)
RRL	Response Rate Limiting (BIND)
RRO	Radial Run Out (DVD)
RROD	Red Ring Of Death (MS, Xbox)
RRP	Registry Registrar Protocol (VeriSign, RFC 2832/3632)
RRT	Retirement Register File (Intel, CPU)
RRZE	Regionales RechenZentrum Erlangen (org.)
RRZN	Regionales RechenZentrum fuer Niedersachsen (org.)
RS	Recommended Standard
RS	Reconciliation Sublayer (10GE, OSI)
RS	Registry Service (DCE, ebXML, ...)
RSA	Random Scheduling Algorithm [protocol]
RSA	Reference System Architecture
RSA	Reusable Software Assets
RSA	Rivest, Shamir and Adleman (cryptography, RSA)
RSAC	Recreational Software Advisory Council (org.)
RSAP	Remote Service Access Point (SAP)
RSAT	Reliability and System Architecture Testing
RSAT	Remote Server Administration Tools (AD)
RSB	Remote view Service Board (FSC)
RSBAC	Rule Set Base Access Control (Linux)
RSCN	Registered State Change Notification (FCP)
RSCS	Remote Source Control System
RSCS	Remote Spooling Communications Subsystem (IBM, VM, NJE)
RSCT	Reliable Scalable Cluster Technology (IBM)
RSD	Really Simple Discoverability
RSDP	Root System Description Pointer (ACPI)
RSDT	Root System Description Table (ACPI)
RSE	Removable Storage Elements
RSE	Research and Systems Engineering
RSF	ReStart active File (IBM, VM/ESA, CP)
RSF	Remote Service Facility (IBM)
RSF	Remote Support Facility
RSFD	Retrieve Subsequent File Descriptor (IBM, VM/ESA, CP)
RSFDNPR	Retrieve Subsequent File Descriptor Not Previously Retrieved (IBM, VM/ESA, CP)
RSFQ	Rapid Single Flux Quantum [logic]
RSH	Remote SHell (Unix, BSD, Shell)
RSH	Restricted SHell (Unix, Shell)
RSI	Repetitive Strain Injury
RSI	repetitive strain injury
RSIS	Relocateable Screen Interface Specification
RSLM	Remote Subscriber Line Module
RSM	Remote Switching Module
RSMMC	Reduced Size MultiMediaCard (MMC), "RS-MMC"
RSN	Real Soon Now (slang)
RSN	Robust Security Network (WLAN, cryptography)
RSN	real soon now
RSP	Reality Signal Processor (Nintendo)
RSPC	Reed Solomon Product Code (SDD, CD), "RS-PC"
RSS	Rich / RDF Site Summary (XML, RDF)
RSSCP	Remote System Services Control Point (SSCP)
RST	Rapid Storage Technology
RST	Running Status Table (DVB)
RSTS	Resource Sharing Time Sharing (DEC)
RSTSE	Resource System Time Sharing/Enhanced (DEC), "RSTS/E"
RSU	Remote Software Update (IBDM, OS/2, ...)
RSU	Remote Switching Unit
RSVP	Resource reSerVation Protocol (IP, RFC 2205)
RSVP	respondez s'il vous plait ("reply please")
RSX	Realistic Sound eXperience (Intel, audio)
RSX11	Resource Sharing eXecutive - 11 (DEC, OS, PDP 11), "RSX-11"
RSX3D	Realistic Sound eXperience - 3D (Intel, audio, VRML), "RSX-3D"
RT	Register Transfer
RT	Remote Terminal
RT	Research and Technology, "R&T"
RT	Routing Type
RTA	Rapid Thermal Annealling (IC, MOSFET)
RTA	Real Time Adherence
RTA	Real-Time Accelerator
RTAM	Remote Teleprocessing Access Method
RTB	Read Tape Binary
RTBM	Real Time Bit Mapping (BIT)
RTC	Real Time Clock
RTC	Real-Time Command
RTCP	Real Time Control Protocol (RTP)
RTCS	Real Time Computer System
RTCU	Real Time Control Unit
RTD	Real Time Display
RTDAT	RealTime Deformation And Tessellation [engine] (3D, Shiny), "RT-DAT"
RTDHS	Real Time Data Handling System
RTE	Real Time Execution
RTE	Real Time Executive (OS, HP, HP 2000)
RTE	Remote Terminal Emulation
RTE	Run Time Environment
RTE6VM	Real Time Executive - 6 / Virtual Memory (OS, HP, RTE, HP 1000), "RTE-6/VM"
RTEMS	Real-Time Executive for Multiprocessor Systems (RTOS)
RTEX	Real Time EXecutive (OS, Interdata)
RTF	Rich Text Format
RTFF	Read The Fucking FAQ (slang, Usenet)
RTFM	Read The Flaming / Fucking Manual (slang, Usenet, IRC)
RTG	Real Time Gambling
RTG	Real Time Geometry (manufacturer)
RTG	Routing Table Generator
RTI	ReTurn from Interrupt
RTIN	Request Topology INformation (FCP, SNIA, HBA, API)
RTK	Real Time Kinematic
RTL	Real Time Language
RTL	Register Transfer Language (GCC)
RTL	Register Transfer Level
RTL	Resistor-Transistor Logic
RTL	RunTime Library
RTLINUX	Real-Time Linux (Linux)
RTM	Registered Transfer Module
RTM	Release To Manufacture / Market
RTM	Remote Test Module
RTMOS	Real Time Multiprogramming Operating System (OS, GE)
RTMP	Routing Table Maintenance Protocol (AppleTalk)
RTMS	Real Time Multiprogramming System (???) (OS)
RTOS	Real Time Operating System (OS, Interdata, Prime, ...)
RTOS16	Real Time Operating System - 16 (OS, Digico), "RTOS-16"
RTOS360	Real Time Operating System /360 (IBM, OS, S/360), "RTOS/360"
RTOSUH	Real Time Operating System - Universitaet Hannover (OS), "RTOS-UH"
RTP	Real Time Protocol (Internet, RFC 1889/1890, RTCP)
RTS	Real Time Strategy [game] (TBS)
RTS	Real Time System
RTS	Reliable Transfer Service (OSI)
RTS	Request To Send (MODEM, RS-232)
RTS	Residual Time Stamp
RTSE	Reliable Transfer Service Element (OSI)
RTSM	RealTime System Manager
RTSP	Real Time Streaming Protocol (TV, WWW, UDP, TCP/IP, RDP, Multicast, VoIP, RFC 2326)
RTT	Resonant Tunneling Transistor
RTT	Round-Trip Time
RTTI	Run-Time Type Identification (ANSI)
RTTM	Round-Trip Time Measurements (TCP, satellite)
RTTS	Real Time Task Scheduler (OS, August Systems)
RTTY	Radio Tele TYpe
RTU	Real Time Unix (Unix)
RTU	Remote Terminal Unit (ESA, Venus-Express)
RTUX	Real Time UniX (OS, Emerge Systems)
RTV	Real Time Video
RTVBR	RealTime Variable Bit Rate (VBR, ATM, BIT), "rt-VBR"
RTX	Real Time eXecutive (OS)
RTX16	Real Time eXecutive - 16 (OS, Honeywell, ...), "RTX-16"
RUA	Remote User Agent
RUAC	Remote User Access Centers
RUI	Reality User Interface
RUM	Real User Monitoring (WWW)
RUOW	Remote Unit Of Work (DRDA, IBM), "RUoW"
RUP	Rational Unified Process (IBM)
RUS	Rechenzentrum der Universitaet Stuttgart (org., Uni Stuttgart, Germany)
RUTE	RUTE Users Tutorial and Exposition (Unix), "R.U.T.E."
RUU	ROM Upgrade Utility (HTC, ROM)
RVC	Ruby VSphere Console (VSAN), "RvC"
RVD	Remote Virtual Disk
RVI	Rapid Virtualization Indexing (SLAT, AMD)
RVPPIP	Rendez-Vous Protocol / Presence Information Protocol (IM), "RVP/PIP"
RW	Read/Write (I/O), "R/W"
RWCP	Real World Computing Partnership (org., Japan)
RWD	Responsive Web Design (WWW)
RWPPI	ReWritable Product Promotion Initiative (org., DVD-R, DVD-RW, DVD)
RWS	Remote WinSock (Windows, TCP/IP)
RWU	Remote Wake-Up (LAN)
RXR	Regular XML RDF (XML, RDF)
RZ	RechenZentrum
RZ	Return-to-Zero [recording]
RZG	RechenZentrum Garching
RZM	RootZone Maintainer (DNS)
S/T	self titled
S360	System /360 (IBM), "S/360"
S370	System /370 (IBM), "S/370"
S5	Simple Standards-based Slide Show System (XHTML, CSS, JavaScript)
SA	Security Associations (IPSec)
SA	Software Assurance (MS)
SA	Source Active (PIM, MSDP, Multicast)
SA	Source [MAC] Address (SNA, Token Ring, ATM, FDDI, ...)
SA	Spare Area (CD-MRW, DA)
SA	Storage Array
SA	Structured Analysis / Strukturierte Analyse (CASE)
SA	System Administrator
SA	Systems Analyst
SAA	Standard Application Architecture (IBM)
SAA	Standards Association of Australia (org., Australia)
SAAJ	SOAP with Attachments API for Java (SOAP, Java, API)
SAAL	Signalling ATM Adaptation Layer (ATM)
SAAS	Software As A Service, "SaaS"
SABB	Storage Array Building Block
SABM	Set Asynchronous Balanced Mode (LABM, LAPB, HDLC)
SABME	Set Asynchronous Balanced Mode Extension (SABM)
SABRE	Semi-Automatic Business Related Environment (OS, IBM 7090)
SAC	Service / Special Area Code
SAC	Single Attachment Concentrator (FDDI)
SAC	Spatial Audio Coding
SAC	Strict Avalanche Criterion (cryptography)
SACCH	Slow Associated Control CHannel (GSM, DCCH, mobile-systems)
SACD	Super Audio Compact Disk (CD, audio)
SACRED	Securely Available CREDential (RFC 3760)
SACT	SPARC Application Conformance Test (SI, SPARC)
SAD	Security Association Database (SA, IPSec)
SAD	Serial Analog Delay
SADF	Semi-Automatic Document Feeder
SADT	Structured Analysis and Design Techniques (SA)
SAF	Service Access Facilities (Unix)
SAFE	Security And Freedom through Encryption [law] (USA, cryptography)
SAFTE	SCSI Accessed Fault-Tolerant Enclose (SCSI, RAID, Intel, NStor), "SAF-TE"
SAG	SQL Access Group (org., manufacturer, DB)
SAGA	Standards und Architekturen fuer eGovernment Anwendungen (IDA)
SAGE	Semi-Automatic Ground Environment system (OS, IBM AN/FSQ7, mil.)
SAGE	Software Aided Group Environment (GSS, NUS)
SAGNA	Software AG of North America
SAHF	Store AH Into Flags (assembler)
SAIL	Stanford Artificial Intelligence Laboratory [language] (USA, AI)
SAIT	Samsung Advanced Institute of Technology (org., Samsung)
SAIT	Super Advanced Intelligent Tape (Sony, AIT, Streamer), "S-AIT"
SAL	SQL windows Application Language (SQL, Gupta)
SAL	Security Access List
SAL	Semware Applications Language (Semware)
SAL	Symbolic Assembly Language (assembler)
SAL	System Abstraction Layer
SALT	Script Application Language for Telix
SALT	Speech Application Language Tag (MS)
SALT	Suse Advanced Linux Technology (Suse, Linux)
SALU	Structured Assembly Language Utilities
SAM	SCSI-3 Architecture Model
SAM	Security Access Manager (MS, Windows, XP)
SAM	Security Account Manager (Samba)
SAM	Sequential Access Method / Mode (SAM, DAM)
SAM	Sort And Merge
SAM	Standard Application Model (XTM)
SAM	Storage Application Model (Seagate)
SAM	Symantec Anti-virus for Macintosh (Apple)
SAM	System Activity Monitor
SAMATE	Software Assurance Metrics And Tool Evaluation (NIST)
SAMI	Synchronized Accessible Media Interchange (MS)
SAML	Security Assertion Markup Language (OASIS, cryptography)
SAN	Schulen ans Netz [e.v.] (org.)
SAN	Storage Area Network
SANDRA	System ANalyzer Diagnostic and Reporting Assistant
SANE	Scanner Access Now Easy (OSS)
SANE	Standard Apple Numeric Environment (Apple)
SANET	Slowak Academic NETwork (org., Network)
SAO	Server Activated Object
SAO	Session At Once (CD)
SAO	Source Address Omitted [flag] (CATNIP)
SAP	SIM Access Protocol (mobile-systems, Bluethooth)
SAP	Service Access Point (OSI)
SAP	Service Advertising Protocol (Novell, Netware, IPX)
SAP	Session Announcement Protocol (Internet, RFC 2974)
SAP	Symbolic Assembler Program (IBM, IBM 704)
SAP	SystemAnalyse und Programmentwicklung (manufacturer, predecessor)
SAP	Systems, Applications and Products [in data processing] [ag] (manufacturer)
SAQ	Service, Access, Quality (ISP, UK)
SAR	Segmentation And Reassembly
SAR	Specific Absorption Rate (mobile-systems)
SAR	Store Address Register (IC)
SAR	search and rescue
SAR	some assembly required
SARAH	Standard Automated Remote-to-AUTODIN Host (AUTODIN, mil.)
SARPDU	Segmentation And Reassembly Protocol Data Unit (ATM, PDU), "SAR PDU"
SART	Structured Analysis / Real Time (SA, CASE), "SA/RT"
SARTS	Switched Access Remote Test System
SAS	Session Active Screen (IBM)
SAS	Simulation Automation System
SAS	Single Attachment Station (FDDI)
SAS	Statistical Analysis System
SASD	Sequential Access Storage Device
SASE	Specific Application Service Element (ISO, OSI, CASE)
SASI	Shugart Associates System Interface
SASL	Simple Authentication and Security Layer
SASPF	Standard-Anwendungs-Software-Produkt-Familien (Bundeswehr)
SAST	South Australia Standard Time [+0930] (TZ)
SAT	SIM Application Toolkit (SIM, GSM)
SAT	Standard AUTODIN Terminal (AUTODIN, mil.)
SAT	Summed Area Table (3D, MIP)
SATA	Serial Advanced Technology Attachment (HDD, ATA, SATA)
SATAHAT	SATA Hardware Attached on Top (SATA), "SATA-HAT"
SATAN	Security Administrator Tool for Analyzing Networks (Internet)
SATCOM	SATellite COMmunications
SATF	Shared Access Transport Facility
SAU	Secure Access Unit
SAX	SUSE Advanced X [configuration tool] (SUSE, Linux)
SAX	Simple API for XML (API, XML)
SB	Sound Blaster [audio card] (audio, Creative)
SB	System Builder [software] (MS)
SBA	SideBand Address [port / bus] (AGP)
SBA	Standards-Based Architectures
SBA	Synchronous Bandwidth Allocation (SMT, FDDI)
SBA	System For Business Automation
SBC	SCSI Block Commands (SAM)
SBC	Single Board Computer
SBC	Small Business Computer
SBC	Smart Bitrate Control (DivX, video, BIT)
SBCCS	Single Byte Command Code Set [protocol]
SBCL	Steel Bank Common LISP (LISP)
SBCS	Single Byte Character Set (ASCII, DBCS)
SBE	System Builder Edition (MS, Windows)
SBF	Sequential Block Filemanager (OS-9)
SBF	Simple Boot Flag (Linux, POST)
SBF	Single Binary File (Motorola, mobile-systems)
SBH	Secure Backbone Hub (Accton)
SBI	Storage Bus Interconnect
SBI	Synchronous Bus Interface
SBIS	Sustaining Base Information System
SBL	Super BASIC Language (BASIC)
SBLC	Sustaining Base Level Computer
SBMS	Southwestern Bell Mobile Service
SBOD	Switched Bunch Of Disks (Xyratex, FC)
SBP	SCSI-3 serial Bus Protocol (SAM)
SBR	Spectral Bandwidth Replication (MP3, AAC, EAC)
SBS	Small Business Server (MS)
SBUS	Sun [i/o interface] BUS (Sun, SPARC), "SBus"
SC	SubCommittee (ISO, TC, IEC, ...)
SCA	Scalable Cooperative Architecture
SCA	Software Corporation of America (manufacturer, USA)
SCA	Synchronous Clock Adjustment
SCADA	Supervisory Control And Data Acquisition
SCAF	Service Control Agent Function (IN)
SCAI	Scandinavian Conference on Artificial Intelligence (conference, FAIS, AI)
SCAM	SCSI Configured AutoMatically (SCSI)
SCAMC	Symposium on Computer Applications in Medical Care (Konferenz)
SCAN	Switched-Circuit Automatic Network
SCAP	Security Content Automation Protocol (CVE, NIST)
SCART	Syndicat des Constructeurs d' Appareils Radiorecepteurs et Televiseurs (org., video)
SCB	Shell Control Box (Balabit)
SCB	Subsystem Control Block (OS/2, IBM)
SCC	SCSI Controller Commands (SAM)
SCC	Serial Communication Controller (FCC, MCC)
SCC	Serial Controller-Chip (IC)
SCC	Softarc Certified Consulter (SoftArc)
SCC	Specialized Common Carrier
SCC	Standards Council of Canada (org., Canada)
SCC	Storage Connecting Circuit
SCC	System Configuration Card (Sun)
SCCP	Signaling Connection Control Part (MSC, GSM, mobile-systems, SS7)
SCCP	Skinny Client Control Protocol (Cisco, VoIP, TCP)
SCCS	Source Code Control System (Unix, AT&T, CM)
SCCS	Specialized Common Carrier Service
SCCS	Switching Control Center System
SCD	SPARC Compliance Definition (SI, SPARC)
SCDE	Significant CALS Data Elements
SCDJWS	Sun Certified Developer for Java Web Services (Sun, Java)
SCDMA	Synchronous Code Division Multiple Access (CDMA, mobile-systems)
SCDMS	Society for Clinical Data Management Systems (org., USA)
SCE	Sony Computer Entertainment (manufacturer, Sony)
SCE	Structure Chart Editor
SCEA	Sony Computer Entertainment America (Sony, manufacturer)
SCEF	Service Creation Environment Function (IN)
SCEIO	Societe Canadienne pour l'Etude de l'Intelligence par Ordinateur (org., Canada, AI)
SCF	Selective Call-Forwarding
SCF	Sequential Character Filemanager (OS-9)
SCF	Service Control Function (IN)
SCG	Security Classification Guide
SCH	Synchronization CHannel (GSM, mobile-systems)
SCHWAFEL	Self Constructing Hyper Wavelet Algorithms For Extrapolating Linguistics
SCI	Scalable Coherent Interface (ANSI)
SCID	Service Channel IDentifier
SCIT	Semi-Conductor and Interconnect Technologies
SCL	System Control Language
SCLT	Suse Certified Linux Trainer (SuSE, Linux)
SCM	Segment Control Module
SCM	Service Circuit Modul Mil., Germany
SCM	Service Configuration Manager (TR-069, ISP)
SCM	Service Control Manager (Windows NT)
SCM	Small Core Memory
SCM	Software Configuration Management
SCM	Supply Chain Management
SCMAD	Sun Certified Mobile Application Developer (Sun, Java, J2ME, JTWI)
SCMP	Stream Control Message Protocol (ST2)
SCMS	Serial Copy Management System
SCMS	[scrambling] (DAT)
SCN	Specifications Change Notice
SCNR	Sorry, Could Not Resist (slang, Usenet)
SCNR	sorry, could not resist
SCO	Santa Cruz Operation (manufacturer, Unix)
SCO	Synchronous ConnectionLess (HCI, Bluetooth)
SCOM	System Center Operations Manager (MS)
SCOMO	Software Component Management Object (OMA)
SCOOPS	SCheme Object Oriented Programming System (OOP)
SCOPE	SCalable Object Processing Environment (Creamware)
SCOPE	Simple COmmunications Programming Environment (telecommunication)
SCOPE	Supervisory Control Of Program Execution (OS, CDC 6000)
SCP	Secondary Communications Processors
SCP	Secure CoPy (SSH)
SCP	Service Control Point (OSI)
SCP	Standard Configuration Profile (MODEM)
SCP	System Control Program (OS)
SCPC	Single Channel Per Carrier
SCPDOS	Seattle Computer Products Dis Operating System (OS, DOS, MS-DOS, predecessor), "SCP-DOS"
SCPM	SUSE Configuration Profile Management (Linux, SUSE)
SCR	Selective Call Rejection
SCR	Sustainable Cell Rate (UNI, ATM, VBR)
SCRI	Supercomputer Computations Research Institute (org., USA, HPC)
SCS	SNA Character String (IBM)
SCS	Silicon Controlled Switch
SCS	Singapore Computer Society (org., Singapur)
SCS	Small Computer System
SCS	Sun Control Station (Sun)
SCS	Switch Control Software (ForeRunner, ATM)
SCS	[systimax] Structured Cabling System (AT&T)
SCSA	Signal Computing System Architecture
SCSA	Sun Common SCSI Architecture (Sun)
SCSI	Small Computer Systems Interface (SCSI)
SCSL	Sun Community Source License (Sun)
SCST	SCSI Target framework for linux (SCSI, Linux)
SCSU	Standard Compression Scheme for Unicode (Unicode)
SCT	Subroutine Call Table
SCTE	Society of Cable Telecommunications Engineers (org.)
SCTP	Stream Control Transmission Protocol (IETF)
SCTS	Secondary Clear to Send
SCU	Selector Control Unit
SCU	Snoop Control Unit (ARM, MPCore)
SCU	System Control Unit (CPU, POWER)
SCUMM	Script Creation Utility for Maniac Mansion
SCVMM	System Center Virtual Machine Manager (MS)
SCVP	Simple Certificate Validation Protocol (cryptography)
SCWCD	Sun Certified Web Component Developer (Sun)
SCX	Specialized Communications eXchange
SD	Secure Digital [card] (CPRM)
SD	Self-Describing [file] (HP)
SD	Starting Delimiter (FDDI, Token Ring)
SD	Structured Design (CASE)
SD	Super Density [disk] (CD, Toshiba, Time Warner)
SD	System Display (Airbus, A380)
SDA	Screen Design Aid (IBM, ADT)
SDA	Shared Data Architecture
SDA	Software Design Automation
SDA	Source Data Automation
SDA	Static Data Authentication (EMV, cryptography)
SDA	Swappable Data Area (DOS)
SDA	System Display Architecture
SDAO	Simulated Data Access Object (DAO, J2EE, Java, DB)
SDAP	Service Discovery Application Profile (Bluetooth)
SDAV	Systems Design Automation Vendor
SDC	Sample Data Collection
SDC	Secure Digital Card (PDA)
SDC	Software Development Control [system] (CMU, CM)
SDC	Software Distribution Center
SDCB	Shared File Control Block (Apollo, DOMAIN)
SDCCH	Stand-alone Dedicated Control CHannel (GSM, DCCH, mobile-systems)
SDCD	Secondary Data Carrier Detect
SDD	Software Design Document
SDD	Super Density Disk (Toshiba, Time Warner, ...)
SDDAS	Southwest research Data Display and Analysis System
SDDI	Shielded Distributed Data Interface (FDDI, STP)
SDE	Service Data Element (grid)
SDE	Software Development Engineer
SDE	Software Development Environment
SDF	Screen Definition Facility
SDF	Standard Data Format
SDF	System Dialog Facility (BS2000)
SDFI	Secure Digital Forensic Imaging
SDH	Synchronous Digital Hierarchy (FDDI, ATM, SDH)
SDHC	Secure Digital High Capacity (SD)
SDI	Single Document Interface
SDI	Slovensko Drustvo Informatika (org., Slowakien)
SDI	Source Data Information
SDI	Standard Data Interface
SDI	Standard Disk Interconnect
SDI	Standard Disk Interface
SDI	Standard Drive Interface
SDI	Storage Device Interconnect
SDI	Storage Device Interface (Novell, Netware, SMS)
SDI	Super Data Interchange
SDIF	SGML Document Interchange Format (SGML, ISO, IS 9069)
SDIF	System Independent Data Format (Novell, SMS)
SDILINE	Selective Dissemination of Information onLINE
SDIMM	Single [RAS] Dual Inline Memory Module (DIMM, RAS), "S-DIMM"
SDIO	Secure Digital Input Output (SD)
SDIS	Switched Digital Integrated Service
SDK	Software Development Kit (MS, IBM)
SDK	StandardDatenschutzKlausel (DSGVO)
SDL	Security Development Lifecycle (MS)
SDL	Simple Directmedia Layer
SDL	Software Development Laboratories (manufacturer, veraltet, Oracle)
SDL	Specification and Description Language (CCITT)
SDL	System Design Language
SDLC	Synchronous Data Link Control (IBM, SNA)
SDLGR	Specification and Description Language / Graphical Representation, "SDL/GR" 
SDLLC	Synchronous Data Link Control Conversion (SNA, IBM)
SDLP	Standard Device Level Protocol
SDLT	Super Digital Line Tape (DLT, Streamer)
SDM	Short Data Message
SDM	Spatial Data Management
SDM	Standard-Datenschutzmodell
SDM	Sun Download Manager (Sun)
SDM	System Development Multitasking [benchmark] (DB, SPEC)
SDMA	Space Division Multiple Access
SDMA	Storage Device Migration Aid
SDMI	Secure Digital Music Initiative (org.)
SDMS	SCSI Device Management System (BIOS)
SDN	Software Defined Networking
SDN	Software Distribution Net (FidoNet)
SDNS	Secure Data Network Service / System (USA, mil.)
SDOC	Selective Dynamic Overload Controls
SDOS	Software Dynamics Operating System (OS)
SDP	Scenario Design Power (TDP)
SDP	Service Delivery Point
SDP	Service Discovery Profile (Bluetooth)
SDP	Session Description Protocol (RFC 2327)
SDP	Shared Development Process (MS)
SDP	Software Development Plan
SDP	Specialized Data Point (IN)
SDP	Streaming Data Procedure
SDQ	Store Data Queue (Power4, IBM, CPU, SRQ)
SDR	Service DiRectory [tool] (SAP)
SDR	Shared Data Research
SDR	Signal-to-Distortion Ratio
SDR	Single Data Rate (GDR, QDR, ODR)
SDR	Software Defined Radio
SDR	Store Data Register (IC)
SDR	Streaming Data Request
SDR	System Design Review
SDRAM	Synchronous Dynamic Random Access Memory (RAM, DRAM, IC, Intel, Samsung)
SDRP	Source Demand Routing Protocol
SDRSDRAM	Single Data Rate Synchronous Dynamic Random Access Memory (DRAM, RAM, IC), "SDR-SDRAM"
SDS	Software-Defined Storage, "SdS"
SDS	SubDivision Surfaces (3D)
SDS	Switched Data Service
SDS	Synchronous Data Set
SDS	Sysops Distribution System (BBS)
SDSAF	Switched Digital Services Applications Forum (org.)
SDSC	San Diego Supercomputer Center (org., USA)
SDSC	Synchronous Data Set Controller
SDSCNET	San Diego Supercomputer Center NETwork (network, USA), "SDSCnet"
SDSL	Single line Digital Subscriber Line (DSL)
SDSMA	Slotted Digital Sense Multiple Access (MODACOM), "S-DSMA"
SDSN	Secure Data System Network
SDT	Service Description Table (DVB)
SDT	Software Development Tools
SDT	Source Data Terminal
SDT	Systems Development Tool
SDTP	[PPP] Serial Data Transport Protocol (PPP, RFC 1963)
SDU	Service Data Unit (OSI)
SDU	Software Distribution Utilities (IBM, HP)
SDV	Switched Digital Video (VOD)
SDX	Storage Data ACceleration (ATAPI, WD, CD, DVD)
SDXC	Secure Digital eXtended Capacity (SD)
SE	Security Enhanced [linux] (Linux)
SE	Service / Systems Engineer
SE	Software Engineering
SE	Standard / Special Edition (IBM, OS/2)
SE	Switching Element
SE	System Extension
SEA	Self-Extracting Archive
SEA	Society for Electronic Access (org.)
SEA	System Enhancement Associates (manufacturer)
SEAC	Standards Eastern Automatic Computer
SEAL	Simple Encrypted Arithmetic Library (MS, cryptography)
SEAL	Simple and Efficient Adaptation Layer (ATM)
SEAP	Service Element Access Point
SEB	Seat Electronic Box (Airbus, A380)
SEC	Single Edge Contact [card]
SECAM	SEquentiel Couleur Avec Memoire
SECB	Severely Errored Cell Block (UNI)
SECC	Single Edge Connector Case (CPU)
SECCOS	SEcure Chip Card Operating System (OS)
SED	Self-Encrypting Drive (Seagate)
SED	Stream EDitor (Unix)
SED	Surface-conducting electron Emitter Display (Toshiba)
SEDAS	Standardisiertes Einheitliches DatenAustauschSystem (EDI)
SEDISI	Asociacion Espanola de Empresas de Tecnologias de la Informacion (org., Spain, AETIC, predecessor)
SEE	Safenet Ethernet Encryptor (cryptography)
SEE	Societe des Electriciens et Electroniciens (org., France)
SEE	Software Engineering Environments
SEE	Systems Equipment Engineering
SEF	Source Explicit Forwarding
SEFS	Severely Errored Framing Seconds (DS1/E1, DS3/E3)
SEH	Structured Exception Header
SEHOP	Structured Exception Handler Overwrite Protection
SEI	Software Engineering Institute
SEL	Software Engineering Laboratory
SEL	Standard Elektrik Lorenz [ag] (manufacturer)
SEL	System Event Log (IPMI)
SELHPC	South East London - High Performance Computing [centre] (org.), "SEL-HPC"
SELINUX	Security Enhanced Linux (Linux, NSA, FLASK), "SELinux"
SEM	Secure Extension Mode (AMD, TCB)
SEM	Security Event Management (SIM)
SEM	Server Enhancement Module
SEM	Standard Error of the Mean
SEMS	SIP Express MediaServer (SIP, iptel)
SEO	Search Engine Optimization (WWW)
SEP	Someone Else's Problem (slang, Usenet, IRC)
SEP	Symantec Endpoint Protection
SEP	someone else's problem
SEPIA	Simple EMACS PERL InterAction (EMACS, PERL)
SEPP	Secure Electronic Payment Protocol (banking, IBM, Netscape, GTE)
SEQUEL	Structured English QUEry Language (IBM, DB, SQL, predecessor)
SERM	Structured Entity Relationship Model (DB, ERM)
SERP	search engine results page
SERT	Security Emergency Response Team (org., Australia, Internet)
SES	SCSI Enclosure Services (SCSI)
SES	Security Enabling Services (IBM)
SES	Severely Errored Seconds (DS1/E1)
SESAM	Synergetische Erkennung mittels Standbild, Akustik und Motorik (IIS)
SET	Secure Electronic Transactions (IBM, Visa, MS, IBM, Mastercard, Netscape, banking)
SET	Single Electronic Transistor
SET	Software Engineering Technology
SET	Standard d'Echange et de Transfert (AFNOR, France)
SETA	Systems Engineering and Technical Assistance
SETL	SEt Theory Language (New York Uni.), "SetL"
SETP	Secure Electronic Transactions Process
SETP	Stream Environment Transport Protocol
SEU	Software-Entwicklungs-Umgebung (CASE)
SEU	Source Entry Utility (IBM, ADT)
SF	Service Feature (IN)
SF	Sign Flag (assembler)
SF	Software Factories
SF	Standard Form
SF	Switching Fabric
SFAICT	so far as I can tell
SFBI	Shared Frame Buffer Interconnect
SFC	Software Freedom Conservancy (org.)
SFC	System File Checker (MS, Windows)
SFCC	Slat Flap Control Computer (Airbus, A380)
SFD	Simple Formattable Document (CCITT, MHS, X.420)
SFD	Start Frame Delimiter (ethernet)
SFD	Symbolic File Directory
SFF	Small Form Factor [committee] (org.)
SFLC	Software Freedon Law Center (org., GPL)
SFMJI	Sorry For My Jumping In (slang, Usenet, IRC)
SFP	Saved Frame Pointer (CPU, RAM)
SFP	Small Form-factor Pluggable (FC)
SFP	System File Protection (MS, WIndows)
SFPRNSB	Select a File for Processing and Read Next Spool Buffer (IBM, VM/ESA, CP)
SFPS	Secure Fast Packet Switching (Cabletron)
SFQL	Structured Full-text Query Language
SFS	Shared File System (IBM. CMS, VM/ESA)
SFS	Smart File System (Amiga, FS)
SFS	Stepless Frequency Selection (ASUS)
SFS	Suomen Standardisoimisliitto [Standards Association of Finland] (org., Finland)
SFT	System Fault Tolerance (Novell)
SFT	System File Table (DOS)
SFTP	Screened Foiled Twisted Pair [cable] (UTP, TP)
SFTP	Simple File Transfer Protocol (RFC 913)
SFUG	Security Features User's Guide
SG	Signal Ground (MODEM)
SGA	Shared Global Array (DEC, VMS)
SGC	SCSI Graphic Commands (SAM)
SGCP	Simple Gateway Control Protocol (MGCP)
SGEMM	Single precision GEneral Matrix Multiply (GEMM, BLAS)
SGI	Silicon Graphics Incorporated (manufacturer, SGI)
SGM	SeGmentation Message
SGML	Standard Generalized Markup Language (ISO 8879, JTC1, RFC 1874, SGML)
SGMLB	Standard Generalized Markup Language - Binary version (SGML), "SGML-B"
SGMP	Simple Gateway Monitoring Protocol (RFC 1028)
SGRAM	Synchronous Graphics Random Access Memory (DRAM, RAM)
SGSN	Serving GPRS Support Node (GPRS, mobile-systems)
SGT	Surrounding Gate Transistor (IC)
SGTSI	Semi-Graphical Tree Structure Interface
SGX	Software Guard eXtensions (Intel)
SHA	Secure Hash Algorithm (cryptography, NIST)
SHA	Super High Aperture [LCD] (LCD)
SHA1	Secure Hash Algorithm 1 (cryptography, SHA, RFC 3174)
SHED	Segmented Hypergraphics EDitor (MS, Windows, ADT)
SHF	Super-High Frequency
SHID	slaps head in disgust
SHOE	Simple HTML Ontology Extensions (HTML, WWW)
SHTSI	Somebody Had To Say It (slang, Usenet)
SHTTP	Secure HyperText Transfer Protocol (HTTP), "S-HTTP" 
SHV	Standard High Volume [motherboard] (SMP, Intel)
SI	SPARC International (org., manufacturer)
SI	Schweizer Informatikergesellschaft (org., Switzerland)
SI	Skyrslutaeknifelags Islands (org., Iceland)
SI	Source Index [register] (CPU, Intel, assembler)
SI	System Identifier (DTD, URI, SGML, FPI)
SI	System Information
SIA	Semiconductor Industry Association (org., USA)
SIAM	Society for Industrial and Applied Mathematics (org., USA)
SIB	Service Independent building Block (IN)
SIBO	SIxteen Bit Organizer or SIngle Board Organizer (Psion, PDA, BIT)
SIC	Silicon Integrated Circuit
SIC	Standard Industry Classification
SIC	Subject Indicator Code
SICE	Society of Instrument and Control Engineers (org., Japan)
SICS	Swedish Institute of Computer Sciences (org., Sweden)
SID	SWIFT Interface Device (SWIFT)
SID	Security IDentifier (AD, RID, ACL)
SID	Signaling IDentifier
SID	Society for Information Displays (org.)
SID	Sound Interface Device (audio, C64)
SID	Symbolic Instruction Debugger (CP/M)
SID	System IDentification
SID	System Integration & Development, "SI&D"
SIDF	System Independent Data Format (Novell, SMS)
SIDM	Serial Impact Dot Matrix [printer]
SIDR	Service Independent Data Requester (Novell, Netware)
SIEM	Security Information and Event Management
SIETEM	Siemens TTCN Test Manager (TTCN, Tektronix, SNI)
SIF	Significant Pel Field (MPEG)
SIFS	Short InterFrame Space (MAC, 802.11a, IFS, WLAN)
SIFT	Software Implemented Fault Tolerance (HIFT)
SIFTUFT	Sender-Initiated File Transfer/Unsolicited File Transfer (RFC 1440), "SIFT/UFT"
SIG	Special Interest Group
SIGART	[ACM] Special Interest Group on ARTificial intelligence (org., ACM, AI)
SIGBIT	Special Interest Group on Business Information Technology
SIGCAT	Special Interest Group for CD-ROM Applications Technology (CD)
SIGCPR	Special Interest Group on Computer Personal Research (org., ACM)
SIGCSE	Special Interest Group on Computer Science Education (org., ACM)
SIGDA	Special Interest Group on Design Automation (org., ACM)
SIGG	SIGnaturGesetz telecommunication, Germany, "SigG"
SIGL	SIGnal Line (REXX)
SIGMA	Software Industrialized Generator and Maintenance Aids system (MITI)
SIGNC	Special Internet Group Name Cache
SIGPLAN	Special Interest Group for Programming LANguages
SIGV	SIGnaturVerordnung (telecommunication), "SigV"
SIGWEB	Special Interest Group on the world wide WEB (org., UK)
SII	Static Invocation Interface
SIIA	Software and Information Industry Association (org., USA)
SILC	Secure Internet Live Conferencing
SILS	Secure Interoperable LAN/MAN Standard (LAN, MAN)
SILS	Standard for Interoperable LAN Security (LAN)
SIM	Security Information Management (SEM)
SIM	Signal Interface Module
SIM	Subscriber Identity Module (GSM, mobile-systems)
SIMCA	sitting in my chair amused
SIMD	Single Instruction [stream], Multiple Data [stream] (CPU)
SIMDIS	SIMulation DISposition (MBAG)
SIMIS	SIcheres MIkroprozessor System (SNI)
SIMM	Single Inline Memory Module (IC)
SIMNET	SIMulation NETwork (network)
SIMSA		Swiss Interactive Media and Software Association (org.)
SINA	Sichere Inter-Netzwerk Architektur (BSI)
SIO	Simultan Input Output (QMS)
SIP	SCSI-3 Interlocked Protocol (SAM)
SIP	SMDS Interface Protocol (SMDS)
SIP	Scale-Independent Pixel (SP, DIP, DP)
SIP	Session Initiation Protocol (IETF, VoIP, ENUM, RFC 2543)
SIP	Simulated Input Processor
SIP	Strategische InformationsPlanung (IM)
SIP	Symbolic Input Program
SIPC	Simply Interactive Personal Computer
SIPO	Serial In Parallel Out
SIPP	SImple Polygone Processor (Unix)
SIPP	Simple Internet Protocol Plus (IP, IPV6, RFC 1710, Internet)
SIPP	Single Inline Package Pin (IC)
SIPRNET	Secret IP Router NETwork (DISN, mil.)
SIPS	Session Initiation Protocol Secure (SIP, SSL, TCP)
SIPS	Super InPlane Switching (LCD, IPS), "S-IPS"
SIQ	Single Input Queue (IBM, OS/2)
SIR	Save Instruction Recognition
SIR	Selective Information Retrieval
SIR	Serial InfraRed (HP)
SIR	Sicherheit im Rechenzentrum (TPS)
SIR	Statistical Information Retrieval
SIR	Sustained Information Rate (SMDS)
SIRENE	Supplementary Information REquest at the National Entry (SIS, Europe)
SIRI		Speech Interpretation and Recognition Interface (Apple)
SIS	Schengen Information System (police, Europe)
SIS	Silicon Integrated Systems [corp.] (manufacturer, Taiwan)
SIS	Software Information Services
SIS	Stellen-Informations-Service (WWW)
SIS	Strategic Information System
SISA	Sony Interactive Studios America (Sony)
SISAL	Streams and Iteration in a Single-Assignment Language
SISD	Single Instruction [stream], Single Data [stream] (CPU)
SISO	Single Input, Single Output (WLAN)
SISSL	Sun Industry Standards Source License (Sun)
SIT	institut fuer SIchere Telekommunikation (GMD, org.)
SITD	Still In The Dark (slang)
SITD	still in the dark
SIUF	System Initiated User Feedback (MS, Windows)
SIWPS	Simple Internet White Pages Service (Internet)
SIZ	Sparkassen-Informatik-Zentrum (org., banking)
SJF	Shortest Job First
SKI	Service Key Identifier (X509v3, RFC 3280)
SKIA	Secure Key Issuing Authority (TESS)
SKID	Service Key IDentifier (X509v3, RFC 3280)
SKIMS	Schichtenuebergreifendes Kooperatives Immunsystem fuer Mobile, mehrseitige Sicherheit
SKIP	Simple Key-management for Internet Protocols (Internet, cryptography, Sun)
SKS	Synchronizing Key Server (PGP, GPG, PKS, KKS)
SL4A	Scripting Layer For Android (Android)
SLA	Service Level Agreement (ITIL, SLM)
SLAAC	Stateless Address AutoConfiguration (IP, RFC 4862)
SLAC	Secure Linux Administration Conference (Linux)
SLAD	Security Local Auditing DAEMON (BOSS, BSI)
SLAM	Simulation Language for Alternative Modeling
SLAM	Simultaneous Localization And Mapping
SLAT	Second-Level Address Translation
SLB	Segment Lookaside Buffer (CPU, Power4, IBM)
SLC	Service Level Contract
SLC	Short Length Cartridge (IBM, Streamer)
SLC	Simple Line Code [modulation]
SLC	Single Level Cell (IC, Flash, SLC)
SLD	Second Level Domain (Internet, ICANN)
SLDC	Synchronous Data Link Control
SLDRAM	SyncLink Dynamic Random Access Memory (DRAM, RAM)
SLE	Screen List Editing
SLED	Single Large Expensive Drive
SLED	SuSE Linux Enterprise Destop (SuSE, Linux)
SLES	SuSE Linux Enterprise Server (Linux, SUSE)
SLFP	Shared Frame Buffer Interconnect (ATI, Intel)
SLI	Scalable Link Interface (PCIe, Nvidia)
SLI	Scan Line Interleave (3D)
SLIC	Serial Link and Interrupt Controller (TSMP, Wyse)
SLIC	Software LICensing description table (BIOS)
SLIC	Subscriber Line Interface Circuit (PBX)
SLIK	SimpLIstic sKin interface (GTK)
SLIP	Serial Line Internet Protocol (Internet, RFC 1055), "SL/IP"
SLM	Service Level Management (ITIL)
SLM	Single Lock Manager (GFS)
SLMR	Silly Little Mail Reader
SLOS	SuSE Linux Office Server (SuSE, Linux)
SLOX	SuSE Linux Open eXchange server (SuSE, Linux)
SLP	Service Location Protocol (IP, RFC 3224)
SLP	Service Logic Program (IN)
SLP	Substrate Like PCB (PCB)
SLP	Symposium on Logic Programming (Konferenz)
SLP	System Locked Preinstallation (MS, Windows, XP, OEM)
SLQ	Super Letter Quality [fonts] (Star)
SLR	Scalable Linear Recording (Streamer, Tandberg)
SLS	Single Large Surface [display]
SLS	Softlanding Linux System (Linux)
SLS	Storage Library System
SLSI	Super Large Scale Integration
SLT	Solid-Logic Technology
SLU	Secondary Logical Unit
SLU	Serial Line Unit
SM	Smart Media [card]
SM	Sparse Mode (PIM, Multicast)
SMA	Shared Memory Architecture
SMA	Standardization Management Activity
SMAE	System Management Application Entity (OSI)
SMAF	Service Management Agent Function (IN)
SMAF	Synthetic Music Mobile Application Format (Yamaha, mobile-systems)
SMAP	Soil Moisture Active Passive
SMAP	System Management Application Process (OSI)
SMART	Self-Monitoring, Analysis and Reporting Technology (HDD, IDE, Conner, IBM, Quantum, Seagate, WD), "S.M.A.R.T."
SMASE	System Management Application Service Element (OSI)
SMB	Server Message Block [protocol] (IBM, Intel, MS)
SMB	Small Medium Business and enterprise [market]
SMB	Standards Managing Board (PIMA, I3C)
SMB	System Management Bus
SMBA	Shared Memory Buffer Architecture (Intel)
SMBP	Sever Message Block Protocol
SMC	SCSI-3 Medium changer Commands (SAM, SCSI)
SMC	Standard Microsystems Corporation (manufacturer)
SMD	Storage Module Device
SMD	Surface Mounted Device
SMD	System Management Bus ??? (Intel)
SMDAC	Single MAC Dual Attached Concentrator (FDDI, DAC, MAC)
SMDI	Simplified Message Desk Interface (Bell Labs)
SMDI	Storage Module Disk Interconnect
SMDL	Standard Music Description Language (ISO, IEC, CD 10743)
SMDR	Station Message Detail Recording
SMDR	Storage Management Data Requester (Novell, Netware, SMS)
SMDS	Switched Multimegabit Data Service (BELLCORE, BIT)
SMDSCNM	SMDS Customer Network Management (SMDS), "SMDS CNM"
SME	Society of Manufacturing Engineering (org., USA)
SME	Storage Management Engine (Novell, Netware, SMS)
SMEP	Supervisory Mode Execution Prevention (AMT, Intel)
SMF	Service Management Framework (IBM)
SMF	Service Management Function (IN)
SMF	Single Mode Fiberoptic cable (FDDI, MMF)
SMF	Standard MIDI File (MIDI)
SMF	System Management Function (MS, MOF)
SMFA	Special / System Management Functional Area (OSI)
SMFF	Script Mathematical Formula Formatter
SMG	Special Mobile Group (GSM, org., mobile-systems)
SMGW	Smart Meter GateWay
SMH	shaking my head
SMI	Storage Management Initiative (org., SAN, Bluetooth, SNIA)
SMI	Structure and identification of Management Information (OSI, RFC 1155/1902)
SMI	Sun Microsystems Inc. (manufacturer)
SMI	System Management Interrupt (SMB)
SMI	System Memory Interface (Power4, IBM)
SMI	System Monitoring Interface (Informix, DB)
SMIL	Synchronized Multimedia Integration Language (W3C, WWW)
SMIME	Secure/Multipurpose Internet Mail Extensions (MIME, MS, Lotus, Qualcomm, RSA, cryptography), "S/MIME"
SMING	Structure of Management Information - Next Generation (RFC 3780), "SMIng"
SMIOS	System Management Basic Input Output System (DMTF, BIOS)
SMIS	Service-Marketing-InformationsSystem (MBAG)
SMIS	Storage Management Initiative Specification (SMI, SAN, WBEM, CIM, SLP, SNIA), "SMI-S"
SMIT	System Management Interface Tool (IBM, AIX)
SMK	Software Migration Kit
SMK	Structured Meta-Knowledge
SML	Service Management Layer (TMN)
SML	Shared Memory Link (TCP/IP)
SML	Siemens Modular Link
SML	Standard Machine Language
SML	Standard Meta Language
SMLNJ	Standard Meta Language / New Jersey, "SML/NJ" 
SMLSFB	so many losers, so few bullets
SMM	System Management Mode (CPU)
SMM	System Manager's Manual (BSD, Unix)
SMOLED	Small Molecules Organic Light Emitting Display (OLED, LED)
SMOP	simple matter of programming
SMP	Software Motion Picture (DEC)
SMP	Symmetric MultiProcessor [system] (SMP, AMP)
SMP	Symmetrisches MultiProzessor [system]
SMP	System Modification Program
SMPC	Shared Memory Parallel Computer (HPC)
SMPPPD	Suse Meta Point-To-Point DAEMON (SuSE, Linux, PPP, DAEMON)
SMPTE	Society of Motion Picture and Television Engineers (org.)
SMPU	Switch Module Processor Unit
SMR	Shingled Magnetic Recording (Seagate)
SMR	Source Maintainability and Reliability
SMR	Specialized Mobile Radio [systems]
SMRT	Signal Message Rate Timing
SMS	Service Management System
SMS	Short Message Service (GSM, mobile-systems)
SMS	Storage Management Services (Novell, Netware)
SMS	System-Managed Storage
SMS	Systems Management Server (MS, MOM)
SMSAC	Society of Management Science and Applied Cybernetics (org., India)
SMSC	Short Message Service Center (SMS, GSM, mobile-systems)
SMSCB	Short Message Service Cell Broadcast (SMS), "SMS CB"
SMSCEMI	Short Message Service Center External Machine Interface [protocol] (SMS)
SMSP	Storage Management Services Protocol (Novell, SMS)
SMT	Segment Table Map
SMT	Shared Memory Transport (X-Windows)
SMT	Simultaneous MultiThreading (CPU)
SMT	Staroffice Migration Toolkit (Sun)
SMT	Station ManagemenT (FDDI)
SMT	Surface-Mount Technology
SMTA	Subordinate Message Transfer Agent (MTA)
SMTP	Simple Mail Transfer Protocol (RFC 821, TCP/IP)
SMUG	Seldom Met Users Group [book] (HP, HP 3000)
SMUX	SNMP MUltipleXing protocol (SNMP, MUX, RFC 1227)
SN	Sequence Number
SN	Serial Number
SN	Subscriber Number (MS-ISDN, GSM, mobile-systems)
SN	Super Node (Kazaa, P2P)
SNA	Systems Network Architecture (IBM)
SNAC	SNA Network Access Controller (SNA, SDLC, IDS)
SNAC	SubNetwork ACcess [functions]
SNACP	SubNetwork ACcess Procedure (ISO, IS 8648, SNAC), "SNAcP"
SNACP	[PPP] Systems Network Architecture Control Protocol (PPP, SNA, RFC 2043)
SNADS	Systems Network Architecture Distribution Service (IBM, CCS)
SNAFU	Situation Normal All Fouled Up (slang)
SNAIP	[advanced] Systems Network Architecture/Internet Protocol (SNA, IP, RFC 1538), "SNA/IP"
SNAP	SubNetwork Access Protocol (LAN, ethernet)
SNAP	SubNetwork Attachment Point (IEEE 802.1a)
SNAP	System Neutral Access Protocol (SciTech)
SNAP	System and Network Administration Program
SNARC	Stochastic Neural Analog Reinforcement Computer
SNCP	Single Node Control Point (IBM, SNA)
SNDC	SubNetwork Dependent Convergence [functions] (OSI)
SNDCP	SubNetwork Dependent Convergence Procedure (ISO, IS 8648, OSI, SNDC)
SNEPS	Semantic NEtwork Processing System (GNU, LISP), "SNePS"
SNERT	snot-nosed egotistical rude teenager
SNF	Server Natural Format (Fonts, X)
SNF	Shared Network Facilities
SNG	Satellite News Gathering
SNI	SNA Network Interconnection (IBM, VTAM, SNA)
SNI	Service Name Indicator (TLS, RFC 3546)
SNI	Siemens Nixdorf Informationssysteme [AG] (manufacturer)
SNI	Subscriber Network Interface (SMDS)
SNIA	Storage Networking Industry Association (org., NAS, SAN)
SNIC	SubNetwork Independent Convergence [functions] (OSI)
SNICP	SubNetwork Independent Convergence Procedure (ISO, IS 8648, OSI, SNIC)
SNK	Shin Nihon Kikaku [old term] (manufacturer, Japan)
SNL	Sandia National Laboratories (org., USA)
SNMP	Simple Network Management Protocol (RFC 1157/1902, TCP/IP, IETF)
SNMP	sorry, not my problem
SNMPOID	SNMP Object IDentifier (SNMP), "SNMP OID"
SNNS	Stuttgart Neural Network Simulator (IPVR, NN)
SNOBOL	StriNg Orientated symBOlic Language
SNP	SubNetwork Protocol
SNPA	Sub-Network Point of Attachment
SNPP	Simple Network Paging Protocol (RFC 1861, SMS)
SNR	Serial NumbeR (IMEI, GSM, mobile-systems)
SNR	Signal-to-Noise Ratio
SNRM	Set Normal Response Mode (SDLC, HDLC, ADDCP, LAPB)
SNRME	Set Normal Response Mode Extension (SNRME)
SNS	Secure Network Server
SNTP	Simple Network Time Protocol (NTP, RFC 2030)
SNW	Storage Networking World [conference]
SO	significant other
SOA	Service Orientated Architecture
SOA	Start Of Authority record (DNS)
SOA	State Of the Art (slang)
SOAP	Simple Object Access Protocol (W3C, XML, HTML)
SOAP	Symbolic Optimal Assembly Program (IBM)
SOB	Start Of Block
SOB	son of [a] bitch
SOBA	Service-Orientated Business Applications (SODA, SOA)
SOC	Security Operations Center
SOC	System-On-a-Chip
SOC	Systems and Option Catalog
SOCKS	SOCKet Secure
SOCO	Service Office/Central Office, "SO/CO"
SODA	Service-Orientated Developmenrt of Applications (SOA, SOBA)
SODA	Simplified OS for Distributed Applications (OS)
SODA	System Optimization and Design Algorithm
SODIMM	Small Outline Dual Inline Memory Module (DRAM, DIMM)
SODIS	SOftware Dokumentations- und InformationsSystem
SOE	Sony Online Entertainment (Sony)
SOE	Standard Operating Environment
SOE	Standards of Excellence
SOEP	Secondary Operand Execution Pipeline (Motorola, CPU), "sOEP"
SOF	Start Of Frame (S-ATA)
SOFABED	[davenport] Standard Open Formal Architecture for Browsable Electronic Documents
SOH	Section OverHead
SOH	Start Of Header
SOHO	Small Office / Home Office [market]
SOI	Silicon-On-Insulator [technology/wafer] (IC, IBM)
SOIF	Summary Object Interchange Format (WWW)
SOJ	Small-Outline J-lead [chip] (IC, DRAM)
SOL	Serial Over LAN (AMT, LAN)
SOL	Simulation-Oriented Language
SOLSA	Support of Localized Service Areas (ETSI), "SoLSA"
SOM	Self-Organizing Machine
SOM	Structured Object Method
SOM	System Object Model (IBM, ORB, CORBA)
SONDS	Small Office Network Data System
SONET	Synchronous Optical NETwork (FDDI, ATM, SDH)
SOOO	Star Office / Open Office, "SO/OO"
SOOPPA	Symposion on Object-Oriented Programming emPhasizing Practical Applications
SOP	Standard Operating Procedure
SOP	standard operating procedure
SOPA	Stop Online Piracy Act (Internet)
SORM	Service Orientated Resource Management
SOS	Share Operating System (OS)
SOS	Sophisticated Operating System (OS, Apple)
SOS	Standards and Open Systems
SOS	Support On Site
SOS	Symbolic Operating System (OS)
SOSP	System Operational and Support Plan
SOTA	State of the Art (slang)
SOX	Sound EXchange [software]
SP	SPare (IMEI, GSM, mobile-systems)
SP	Scale-independent Pixel (SIP, DIP, DP)
SP	Security Policies (IPSec)
SP	Service Pack (MS, Windows NT, XP)
SP	Service Processor (EMC)
SP	Service Processor (Power4, IBM, IC)
SP	Service Provider (DMI)
SP	Signal Processor
SP	Simple visual Profile (MPEG)
SP	Speculative Precomputation
SP	Speech Processing
SP	Stack Pointer [register] (CPU, Intel, assembler)
SP	Structured Programming
SP	Support Pack (SAP)
SP	System Product
SP1	Service Pack 1 (MS, Windows, XP)
SP2	Service Pack 2 (MS, Windows, XP)
SPA	Single Page Application (Android)
SPA	Software Publishers Association (org., USA)
SPA	Storage Pool Allocator (ZFS)
SPADE	Statistical Packet Anomaly Detection Engine (Snort, IDS)
SPAG	[european] Standards Promotion and Application Group (org., manufacturer, Europe)
SPAM	Send Phenomenal Amounts of Mail (Usenet, EMP, slang)
SPAM	Spiced Pork and hAM (Usenet, EMP)
SPANS	Simple Protocol for ATM Network Signalling (ForeRunner, ATM)
SPAP	Secure Password Authentication Protocol
SPAP	Shiva Password Authentication Protocol (PAP, 3Com)
SPARC	Scalable Processor ARChitecture (Sun)
SPARC	Standard Planning And Requirement Committee (ANSI, org.)
SPARQL	???
SPAT	Speech Pronunciation Analysis Training (Uni Mainz), "S.P.A.T."
SPB	Shortest Path Bridging (IEEE 802.1aq)
SPC	SCSI-3 Primary Commands (SAM, SCSI)
SPC	Solution Partner Center (IBM)
SPC	Stored Program Command
SPC	Stored Program Control
SPCF	Service Point Command Facility (IBM)
SPCS	Stored Program Control Systems
SPD	Security Policy Database (SP, IPSec)
SPD	Serial Presence Detect (EEPROM, SDRAM)
SPD	Software Product Description
SPD	Software Products Division
SPDEEPROM	Serial Presence Detect - Electronical Erasable Programmable Read Only MemorySerial Presence Detect (EPROM, IC, ROM), "SPD-EEPROM"
SPDIF	Sony/Philips - Digital Interface Format (audio, Sony, Philips), "S/P-DIF"
SPDL	Standard Page Description Language (ISO, IEC, IS 10180)
SPDN	Shared Private Data Network
SPDU	Session Protocol Data Unit (OSI, PDU, OSI/RM)
SPE	Symbolic Programming Environment
SPE	Synchronous Payload Envelope
SPE	Synergistic Processor Elements (IBM, Cell, PPE)
SPEC	System Performance Evaluation Corporation (org., RISC)
SPF	Sender Permitted From [old term] (SPAM)
SPF	Sender Policy Framework (SPAM)
SPF	Structured Programming Facility
SPI	SCSI-3 Parallel Interface (SAM, SCSI)
SPI	Security Parameter Index
SPI	Serial / Synchronous Peripheral Interface
SPI	Service Provider Interface (WOSA)
SPI	Software Products International (manufacturer)
SPI	Software in the Public Interest, inc. (org.)
SPI	Stateful Packet Inspection (TCP/IP)
SPICE	Scalable Parallel Intelligent Communications Engine
SPICE	Simulation Program with Integrated Circuit Emphasis
SPICS	Spare Parts Inventory Control System (MBAG)
SPID	Service Profile IDentifier (ISDN)
SPID	Service Protocol IDentifier
SPIM	SPAM over Instant Messaging (SPAM, IM)
SPIN	Sponsored Programs Information Network
SPIR	Standard Portable Intermediate Representation
SPIRV	Standard Portable Intermediate Representation - V, "SPIR-V"
SPIT	SPAM over Internet Telephony (SPAM, VoiP)
SPKM	Simple Public-Key [GSS-API] Mechanism (GSS, RFC 2025)
SPL	Samsung Printer Language
SPL	Secondary Program Loader (IPL)
SPL	Set Priority Level (Unix)
SPL	Simple Programming Language
SPL	Sound Pressure Level
SPL	Sun Public License (Sun)
SPL	Systems Programming Language (HP, MPE, ALGOL, HP 3000)
SPL1	Simple visual Profile @@ Level 1 (MPEG, QCIF), "SP@@L1"
SPM	Session Protocol Machine (OSI, ISO 8327)
SPM	Set Program Mask
SPM	Software Performance Monitor
SPM	Source Program Maintenance
SPM	System Performance Monitor
SPM2	System Performance Monitor /2 (IBM, OS/2), "SPM/2"
SPMIDI	Scalable Polyphony MIDI (MIDI), "SP-MIDI"
SPML	Service Provisioning Markup Language (OASIS)
SPN	Substitution Permutation Network (cryptography)
SPOF	Single Point Of Failure
SPOOL	Simultaneous Peripheral Operations OnLine
SPOT	Smart Personal Object Technology (MS, Internet)
SPP	Scalable Parallel Processing (Intel)
SPP	Sequenced Packet Protocol
SPP	Serial Port Profile (Bluetooth, GAP, SPP)
SPP	Software Protection Platform (MS, Windows, Vista)
SPP	Standard Parallel Port
SPP	System Platform Processor (Nvidia)
SPPI	Structure of Policy Provisioning Information (RFC 3159)
SPR	Software Problem Report
SPREAD	Systems, Programming, Review, Engineering And Development
SPS	Semiconductor Product Sector (Motorola)
SPS	SpeicherProgrammierbare Steuerungstechnik
SPS	String Processing System
SPS	Support Package Stack (SAP, EP)
SPS	Symbolic Programming System
SPSL	Special-Purpose Simulation Language
SPSS	Statistical Package of the Social Sciences
SPT	Sectors Per Track
SPT	Shortest Path Tree (PIM, ST, Multicast)
SPTS	Single Program Transport Stream
SPU	Synergistic Processing Unit (IBM, Cell)
SPU	System Processing Unit
SPUCDL	Serial Peripheral Unit Controller/Data Link, "SPUC/DL" 
SPUD	Storage Pedestal Upgrade Disk / Drive
SPUR	Supercomputing Program for Undergraduate Research
SPX	Sequenced Packet eXchange (Novell, Netware)
SQ	Shielded Quart [cable]
SQ	Signal Quality (MODEM)
SQA	Software Quality Assurance
SQD	Signal Quality Detector
SQFP	Shrink Quad Flat Package (CPU)
SQL	Structured Query Language (ISO 9075, DB, 4GL)
SQLCLI	SQL Call Level Interface (SAG, SQL), "SQL/CLI"
SQLDA	Structured Query Language Descriptor Area (SQL)
SQLDMO	SQL Distributed Management Objects (MS, SQL Server, OLE, DB)
SQLDS	Structured Query Language/Data System (IBM, VMS), "SQL/DS"
SQLJ	Structured Query Language - Java (SQL, Java, DB, ANSI, NCITS)
SQLMED	Structured Query Language / Management of External Data (SQL, ISO, IEC), "SQL/MED"
SQLXML	Structured Query Language / eXtensible Markup Language (SQL, XML, ISO, IEC), "SQL/XML"
SQM	Software Quality Management
SR	Sensitivity Range (Fuji, photo, CCD)
SR	Service Release (MS)
SR	Source Routing [bridging]
SR	Status Register (IC, assembler)
SRAM	Static Random Access Memory (RAM, IC, RL)
SRAS	Secure Remote AccesS
SRAT	Static Resource Affinity Table (ACPI)
SRB	Stream Request Block
SRC	Sample Rate Converter (audio)
SRC	Semiconductor Research Council (org., USA)
SRC	Standard Context Routing (MODACOM)
SRC	System Resource Controller (AIX, IBM)
SRD	Screen Reader System
SRD	Secondary Received Data
SRD	Send and Request Data (Feldbus)
SRDF	Symmetrix Remote Data Facility (EMC)
SRDIMM	Single Rank Dual Inline Memory Module (IC, DIMM), "SR-DIMM"
SRE	Self Routing switch Element (ATM)
SRF	Science Research Foundation (org., UK)
SRF	Service Resource Function (IN)
SRF	Specifically Routed Frame
SRGB	Standardized Red Green Blue [colorspace] (RGB, Windows)
SRI	Stanford Research Institute (org., USA)
SRI	SubResource Integrity (WWW)
SRK	Storage Root Key (TPM, RSA)
SRL	Serial number revocation List (TCPA)
SRM	Security Reference Monitor (MS, Windows, ACL)
SRM	Storage Resource Management (SAN)
SRM	System Resources Manager
SRN	Source/Recipient Node (IBM)
SRP	Security Rollup Package (MS)
SRP	Software Reuse Program
SRP	Source Routing Protocol (IBM)
SRPI	Server Requester Programming Interface (IBM, API)
SRPM	Scalable Reverse Path Multicast (Multicast)
SRQ	Service ReQuest (GPIB)
SRQ	Store Reorder Queue (Power4, IBM, CPU)
SRS	Sound Retrieval System (Digital audio)
SRS	Sun Ray Software (Sun)
SRS	serious
SRSLY	seriously
SRT	Secure Request Technology (banking, cryptography, Java)
SRT	Signal Requests Terminal
SRT	Source Route Transparent [bridges] (ethernet, Token Ring, IEEE 802.1D)
SRT	Speech Reception Threshold
SRTCP	Secure Real-Time Transport Control Protocol (SRTP)
SRTP	Secure Real-time Transport Protocol (RFC 3711, RTP)
SRTS	Synchronous Residual Time Stamp
SRVCC	Single Radio Voice Call Continuity (LTE, WCDMA)
SRVIFS	SeRVer Installable File System (IBM)
SS	Single Sided [disk] (FDD)
SS	Spread Spectrum (WLAN)
SS	Stack Segment [register] (CPU, Intel, assembler)
SS7	Signaling System 7 (ISDN, 3G)
SS7	Signalling System #7 (PSTN, SS7)
SSA	Serial Storage Architecture (IBM)
SSAC	Security and Stability Advisory Committee (ICANN)
SSADM	Structured System Analysis and Design Method (DB)
SSAO	Screen-Space Ambient Occlusion (HBAO)
SSAP	Session Service Access Point (SAP, LLC, OSI/RM)
SSAP	Source link Service Access Point (SAP, LLC)
SSAS	Station Signaling and Announcement System
SSB	Single SideBand
SSBA	Suite Synthetique des Benchmarks de l'AFFU (MP)
SSBAM	Single SideBand Amplitude Modulation
SSBI	Self-Service Business Intelligence
SSC	SCSI Stream Commands (SAM, SCSI)
SSC	Science Supercomputing Center (Uni Karlsruhe, Germany)
SSC	Security Support Component (NGSCB, TCP)
SSC	Specialized Systems Consultants
SSCF	Service Specific Coordination Function (ATM)
SSCOP	Service Specific Connection Orientated Protocol (ATM)
SSCP	Service Switching & Control Point (IN)
SSCP	System Services Control Point (NAU, SNA, SSCP)
SSCP	Systems Security Certified Professional (ISC2)
SSCPNS	System Services Control Point Network Services (SSCP)
SSCS	Service Specific Convergence Sublayer (ATM)
SSD	Solid State Disk (HDD, RAM)
SSDA	Synchronous Serial Data Adapter
SSDC	Stack Segment Descriptor Cache [register] (SS, Intel, CPU)
SSDD	Single-Sided/Double-Density [disk] (FDD), "SS/DD"
SSDD	Solid State Disk Drive
SSDP	Simple Service Discovery Protocol (UPnP, UDP)
SSDU	Session Service Data Unit
SSE	Simple Screen Editor
SSE	Software Support Engineer
SSE	Streaming SIMD Extensions (Intel, Pentium, SIMD)
SSE	Structured Source Editing (Eclipse)
SSF	Service Switching Function (IN)
SSFDC	Solid State Floppy Disk Card (PCMCIA)
SSH	Secure SHell (Unix, Shell)
SSHD	Solid State Hybrid Drive (SSD)
SSI	Server Side Include [script] (HTTPD, CGI)
SSI	Small Scale Integration
SSI	Software Systems Interface
SSI	[Schwedisches Strahlenschutzinstitut] (Sweden, org.)
SSIA	Subject Says It All (slang)
SSIA	subject says it all
SSID	Service Set IDentification (WLAN)
SSIMM	Single [RAS] Single Inline Memory Module (IC, RAS), "S-SIMM"
SSL	Secure Socket Layer (Netscape, RSA, WWW, cryptography)
SSLTLS	Secure Socket Layer / Transport Layer Security (RSA, cryptography, TLS), "SSL/TLS"
SSM	Set System Mask
SSM	Simplified Storage Management (HSM)
SSM	Source Specific Multicast (IETF, WG, Multicast, RFC 3569)
SSMA	SQL Server Migration Assistant (MS, SQL)
SSML	Speech Synthesis Markup Language
SSO	Single Sign On
SSP	Service Switching Point (IN)
SSP	Silicon Switch Processor (Cisco)
SSP	Standard Printer Port
SSP	Storage Service Provider
SSP	Structured Support Program
SSP	Switch to Switch Protocol (DLSW, RFC 1795)
SSP	Symposium on Security and Privacy (IEEE)
SSP	System Stack Pointer
SSP	System Support Program (OS, IBM)
SSPI	Security Support Provider Interface
SSR	Small Screen Rendering (WWW, Opera)
SSR	Solid-State Relay
SSRF	Server Side Request Forgery
SSRH	Single-Side RowHammer (DRAM, DSRH)
SSSD	Single-Sided/Single-Density [disk] (FDD), "SS/SD"
SSSNA	Server to Server Systems Network Architecture (Banyan, VINES), "SS/SNA"
SST	Saitek Smart Technology
SST	Secure & Smart Technology (TPM), "S&ST"
SST	Simple SIPP Transition (Internet, SIPP)
SST	South Sumatra Time [+0700] (TZ)
SSTO	single stage to orbit
SSTP	Screened Shielded Twisted Pair [cable] (STP, TP), "S/STP" 
SSU	Service Stack Update (MS, Windows)
ST	Seagate Technology (HDD)
ST	Security Target (CC)
ST	Segment Table / Type
ST	Shared Tree (PIM, SPT, CBT, Multicast)
ST	Stuffing Table (DVB)
ST2	[internet] STream protocol 2 (Internet, ATM, RFC 1819, Multicast)
STA	Spanning Tree Algorithm
STA	Static Timing Analysis
STACS	Symposium on Theoretical Aspects of Computer Science (Konferenz)
STAIRS	STorage And Information Retrieval System
STAM	Shared-Time Allocation Manager
STAR	Shareware Trade Association and Resources (org.)
STARS	Software Technology for Adaptable Reliable Systems
STAX	STreaming API for XML (XML, API), "StAX"
STB	Software Technical Bulletin
STC	Science and Technology Center (NSF, USA)
STC	SeT Carry [flag] (assembler)
STC	Secure Transaction Channel (banking, V-One, cryptography)
STC	Space Time Coding (WIMAX, 802.16e)
STC	Standard Transmission Code
STC	Sub-Technical Committee (ETSI)
STCIUR	Sub-Technical Committee International User Requirements (ETSI), "STC IUR"
STCP	Stream Control Transport Protocol
STD	SeT Direction [flag] (assembler)
STD	Secondary Transmitted Data
STD	State Transition Diagram
STD	Subscriber Trunk Dialing
STD	Suspend To Disk (BIOS, ACPI)
STDA	StreetTalk Directory Assistance (Banyan, VINES)
STDIN	STandarD INput
STDM	Synchronous Time Division Multiplexer
STDOUT	STandarD OUTput
STE	Section Terminating Equipment (SONET)
STE	Secure Terminal Equipment
STE	Spanning Tree Explorer
STE	Standard Terminal Equipment
STEP	STandard for the External representation / Exchange of Product data definition (ISO, DP 10303, CAD)
STF	Specialist Task Forces (ETSI)
STFT	Short Time Fourier Transformation
STFU	Shut The Fuck Up (slang, Usenet, IRC)
STGT	SCSI TarGeT framework (SCSI, Linux)
STI	SeT Interrupt [flag] (assembler)
STI	Sony - Toshiba - IBM [cell] (Sony, Toshiba, IBM, IC, SOC)
STI	Standard Tape Interface
STI	Still Image Architecture (Windows 98, WIA)
STIDC	Sony Toshiba IBM Design Center (Sony, Toshiba, IBM, Cell)
STII	[internet] STream protocol II (RFC 1819)
STING	Software Technology Interest Group (CERN, org.)
STIX	SmallTalk Interface to X (GNU)
STIX	Structured Threat Information eXpression (TAXII)
STL	Standard Template Library
STL	Standard Triangulation Language (CAD)
STLP	Secure Transport Layer Protocol
STM	Synchronous Transfer Mode (ATM, SDH)
STM	System Master Tape
STM1	Synchronous Transport Mode 1 [155,52 Mbps] (ATM, STM, SDH, OC-3), "STM-1"
STM12	Synchronous Transport Mode 12 [1866,24 Mbps] (ATM, STM, SDH, OC-36), "STM-12"
STM128	Synchronous Transport Mode 128 [39813,12 Mbps] (ATM, STM, SDH, OC-768), "STM-256"
STM16	Synchronous Transport Mode 16 [2488,32 Mbps] (ATM, STM, SDH, OC-48), "STM-16"
STM3	Synchronous Transport Mode 3 [466,56 Mbps] (ATM, STM, SDH, OC-9), "STM-3"
STM32	Synchronous Transport Mode 32 [4976,64 Mbps] (ATM, STM, SDH, OC-96), "STM-32"
STM4	Synchronous Transport Mode 4 [622,08 Mbps] (ATM, STM, SDH, OC-12), "STM-4"
STM6	Synchronous Transport Mode 6 [933,12 Mbps] (ATM, STM, SDH, OC-18), "STM-6"
STM64	Synchronous Transport Mode 64 [9953,28 Mbps] (ATM, STM, SDH, OC-192), "STM-64"
STM8	Synchronous Transport Mode 8 [1244,16 Mbps] (ATM, STM, SDH, OC-24), "STM-8"
STMRAM	Spin Torque Magnetoresistive Random Access Memory (IC, RAM), "ST-MRAM"
STN	Scientific and Technical Network (network, JICST, FIZ)
STNLCD	SuperTwisted Nematic Liquid Crystal Display (LCD), "STN-LCD" 
STOC	Symposium on Theory Of Computing (Konferenz)
STONE	STructured and OpeN Environment (FZI Karlsruhe, Germany)
STORK	Secure indenTity acrOss boRders acKnowledged
STORM	Statistically-Oriented Matrix Program
STP	SATA Tunneling Protocol (SATA)
STP	Selective Tape Print
STP	Service Transaction Program (IBM)
STP	Shielded Twisted Pair [cable] (TP)
STP	Signaling Transfer Point (IN)
STP	Software Technology Park
STP	Software Through Pictures, "StP" 
STP	Spanning Tree Protocol (IEEE 802.1D, MSTP)
STP	System Training Program
STR	Synchronous Transmit Receive
STRD	STatistical Reference Datasets (NIST), "StRD"
STS	Synchronous Time Stamps (SDH)
STS	Synchronous Transport Signal
STS3C	Synchronous Transport System - level 3 Concatenated (SDH), "STS-3c"
STT	Secure Transaction Technology (MS, banking)
STT	Surface Tunnel Transistor (IC, DRAM, NEC)
STTL	Standard Transistor-Transistor Logic (TTL)
STTS	Secure Tape Transport Service
STU	Secure Telephone Unit
STUN	Simple Traversal of UDP through NAT (SIP, UDP, NAT, VoIP)
STV	Sprint Telecommunications Venture (org.)
STW	search the web
STX	Start of TeXt
STX	Streaming Transformations for XML (XML)
SU	Screening Units
SU	Selectable Unit
SU	Signalling Unit
SU	Storage Unit
SU	Switch User (Unix)
SUA	Single User Account [feature] (Internet, NAT)
SUDS	Software Update and Distribution System
SUG	Sun User's Group (org., Sun, user group)
SUGA	Swedish User Group of Amiga (user group, Sweden, org.)
SUGD	Sun User's Group Deutschland (Sun, org., user group)
SUHD	Samsung Ultra High-Definition (UHD)
SUMC	Space Ultrareliable Modular Computer (RCA)
SUNET	Swedish University NETwork
SUNONE	Sun Open Network Environment (Sun, ONE)
SUNOS	SUN Operating System (Sun, OS, SPARC), "SunOS"
SUNVIEW	SUN's Visual Integrated Environment for Workstations (Sun, GUI)
SUP	Sybase Unwired Platform (SAP)
SUPL	Secure User Plane Location (OMA, A-GPS)
SURANET	Southeastern Universities Research Association NETwork (network, USA), "SURAnet"
SURF	System Utilization Reporting Facility
SUS	Single Unix Specification (Unix)
SUS	Software Update Server / Service (MS)
SUS	stupid user syndrome
SUSE	Software Und SystemEntwicklung [distribution] (Linux), "S.u.S.E."
SUSP	System Use Sharing Protocol
SUT	System Under Test
SUTP	Screened Unshielded Twisted Pair [cable] (UTP, TP), "S/UTP"
SUTT	Single User Test Tools
SUX	sucks
SUX2BU	sucks to be you
SUXGA	Super Ultra XGA [2048x1536] (XGA)
SV	StandortVerteiler (cable, EN 50 173)
SVA	Shared Virtual Area
SVABI	System V Application Binary Interface (Unix, AT&T, SCD)
SVC	SuperVisor Call (IBM, VM, VM/ESA)
SVC	Switched Virtual Call / Circuit (IBM, X.25)
SVC	Switched Virtual Circuit / Channel / Connection (ATM, PVC)
SVCD	Super Video Compact Disk (CD)
SVCI	Switched Virtual Circuit Identifier (SVC, ATM)
SVD	Schweizerische Vereinigung fuer Datenverarbeitung (org., Switzerland)
SVD	Simultaneous Voice/Data
SVD	Supplementary Volume Descriptor (CD, IS 9660)
SVE	Simple Virtual Environment
SVFS	System V File System (Unix)
SVG	Scalable Vector Graphics [format] (W3C, XML)
SVGA	Super Video Graphics Array [800x600] (VGA)
SVID	System V Interface Definition (Unix, AT&T, SCD)
SVIP	Secure Voice Improvement Program
SVK	Self Voicing Kit (IBM, Java)
SVM	Support Vector Machine [concept] (AI, KI)
SVMT	System Virtual Memory Table (BS2000)
SVP	SerVice Provider (ETSI, ETSI 201 671), "SvP"
SVPC	Single Variable Per Constraint
SVPMI	Super VGA Protected Mode Interface (VESA)
SVQ	Sorenson Video Quality (video, CODEC)
SVR3	System V Release 3 (Unix, OS, AT&T)
SVR4	System V Release 4 (Unix, OS, AT&T)
SVS	Single Virtual Space (IBM, OS, OS/SVS)
SW	Semantic Web (WWW)
SWAG	silly, wild-assed guess
SWAHBI	silly, wild-assed hare-brained idea
SWAN	Secure WAN (RSA), "S/WAN"
SWAN	Sun Wide Area Network (Sun, WAN)
SWAP	Shared Wireless Application Protocol (HomeRF Association, WAP, WLAN)
SWAP	Simple Workflow Access Protocol
SWEDAC	[Staatliches Amt fuer Technische Akkreditierung] (Sweden, org.)
SWF	Small Web Format (Macromedia, Flash)
SWI	SoftWare Interrupts (RISC, OS)
SWICO	Schweizerischer Wirtschaftsverband der Informations-, Communikations- und Organisationstechnik (org., Switzerland)
SWIFT	Society for Worldwide Interbank Financial Telecommunication (org., banking)
SWIM	Someone Who Isn't Me (slang, Usenet, IRC)
SWIM	Super Woz' Integrated Machine
SWISH	Simple Web Indexing System for Humans (WAIS, WWW)
SWMBO	she who must be obeyed
SWT	Standard Widget Toolkit (Eclipse, GUI, WTP)
SXGA	Super eXtended Graphics Adapter / Array [1280x1024]
SXRD	Silicon X-tal Reflective Display (LCoS)
SXU	Synergistic eXecution Unit (IBM, Cell, SPU)
SXVGA	Super eXtended VGA [1280x960] (VGA)
SYMM	SYnchronized MultiMedia working group (WAI)
SYS	see you soon
SYSAD	SYStem ADministrator, "SysAd" 
SYSEX	SYStem EXecutive (OS, IBM, S/360)
SYSOP	SYStem OPerator (BBS), "SysOp" 
T1	[digital] Transmission link 1 [1.544 Mbit/s] (DS1, BIT)
T2	[digital] Transmission link 2 [6.312 Mbps] (DS2)
T3	[digital] Transmission link 3 [44.736 Mbps] (DS3)
T4	[digital] Transmission link 4 [274.176 Mbps] (DS4)
TA	TerminalAdapter (ISDN)
TA	Transmitter Address (FPK)
TA	teaching assistant
TAAI	Taiwanese Association for Artificial Intelligence (org., Taiwan, AI)
TAC	Technical Assistance Center (Cisco)
TAC	Technology Access Center (Rogue-Wave)
TAC	Terminal Access Circuit
TAC	Terminal Access Controller (ARPANET, MILNET)
TAC	Type Approval Code (IMEI, GSM, mobile-systems)
TACACS	Terminal Access Controller Access Control System (RFC 1492)
TACS	Total Access Communication Service (mobile-systems)
TACTIS	Thai API Consortium / Thai Industrial Standard [codeset] (API, TIS)
TADF	Thermally Activated Delayed Fluorescense (OLED)
TADI	Time Assigned Data Interpolation
TADIL	TActical Digital Information Link (mil.)
TADS	Test and Debug System
TAE	Telekommunikations-AnschlussEinheit (DTAG)
TAF	Terminal Access Facility
TAFIM	Technical Architecture Framework for Information Management (JIEO, mil.)
TAG	Technical Advisory Group (PIMA, I3C)
TAG	Technical Architecture Group (W3C)
TAIS	Technisch-Administratives InformationsSystem
TAIS	Toshiba America Information Systems [inc] (manufacturer, USA, Toshiba)
TAL	TeilnehmerAnschlussLeitung telecommunication, Germany
TAL	Template Attribute Language (XHTML, ZPT, ZOPE)
TALAE	TALigent Application Program (Taligent), "TalAE"
TALDE	TALigent Development Environment (Taligent), "TalDE"
TALES	Template Attribute Language Expression Syntax (TAL, METAL, ZOPE)
TALISMAN	Tracing Authors' rights by Labelling Image Services and Monitoring Access Network [project] (Europe)
TALOS	TALigent Object Services (Taligent), "TalOS"
TAMINO	Transaction Architecture for Managing InterNet Objects (DBMS, DB, Internet)
TAN	Table / Total Area Network
TAN	TransAction Number (banking)
TANJ	There Ain't No Justice (slang, Usenet, IRC)
TANSTAAFL	There Ain't No Such Thing As A Free Lunch (slang, Usenet)
TANSTAAFL	there ain't no such thing as a free lunch
TAO	Topics, Associations, Occurrences (XTM)
TAO	Track At Once (CD-R)
TAP	Telocator Alphanumeric input Protocol (SNPP, PCIA, SMS, USA)
TAP	Terminal Access Point (cable)
TAP	Test Access Port (IC, IEEE 1149.1, JTAG)
TAP	The Ada Project
TAP	Topfield Application Program
TAP	Transport und Archivierung Produktdefinierender daten (org., DIN, STEP, CIM)
TAPI	Telephony Application Program Interface (Intel, MS, WOSA, CTI)
TAR	Tape ARchiver (Unix)
TARGET	Thrustmaster Advanced pRogramming Graphical EdiTor, "T.A.R.G.E.T"
TAS	Tag Abuse Syndrome (SGML, HTML, slang)
TASE	Telecontrol Application Service Element (ICCP)
TASI	Time-Assigned Speech Interpolation
TASM	Turbo ASseMbler (Borland, assembler)
TAT	Theoretical Arrival Time (GCRA)
TAUCIS	Technikfolgenabschaetzung - Ubiquitaeres Computing und Informationelle Selbstbestimmung (BMBF)
TAXII	Trusted Automated eXchange of Indicator Information
TB	Tabular Bayes' [algorithm]
TB	TeraByte
TB	Transparent Bridging
TBA	to be announced
TBB	Trusted Building Block (TCPA)
TBC	Time Base Corrector (video)
TBC	to be continued
TBCP	Tagged Binary Control Protocol (Adobe, PS)
TBD	to be {decided,determined,done}
TBH	to be honest
TBI	Total Business Integration [system]
TBOMK	the best of my knowledge
TBR	Technical Basis for Regulations (ISDN)
TBRPF	Topology dissemination Based on Reverse-Path Forwarding (RFC 3684)
TBS	Turn Based Strategy [game] (RTS)
TBW	TeraBytes Written
TC	Task Committee (IFIP)
TC	Technical Committee (ISO, OASIS, ...)
TC	Temporary Capacity (IBM)
TC	Terminal Computer
TC	Terminal Controller
TC	Thin Client
TC	Topology Control [message] (OLSR)
TC	Transaction Capabilities
TC	Transfer Control
TC	Transmission Control
TC	Transmission Convergence
TC	Trust Center (cryptography)
TC	TurboCache (graphics)
TCA	Taipei Computer Association (org., Taiwan)
TCA	Target Channel Adapter (Infiniband)
TCA	Typo3 Configuration Array (TYPO3)
TCA	information technology & TeleCommunications Association (org.)
TCAF	Thin Client Application Framework (Java, LDAP, IBM)
TCAM	TeleCommunications Access Method (IBM, telecommunication)
TCAM	Ternary Content Addressable Memory (CAM)
TCAP	Transaction Capabilities Applications Part (MSC, GSM, IN, mobile-systems, SS7)
TCB	Task Control Block (BS2000)
TCB	Trusted Computing Base (MS, Palladium)
TCB	taking care of business
TCC	Telecommunications Center
TCE	Typo3 Core Engine (TYPO3)
TCF	Thin Client Framework (IBM, Java)
TCF	Transparent Computing Facility
TCFS	Transparent Cryptographic FileSystem (Linux, cryptography)
TCG	Trusted Computing Group (org., DRM, AMD, HP, IBM, Intel, MS, ...)
TCH	Traffic CHannel (GSM, mobile-systems)
TCI	Test Cell Input (UNI, ATM)
TCK	Technology Compatibility Kit (JCP, Java, Sun)
TCK	Test ClocK (TAP, IC)
TCL	Tool Command Language
TCLTK	Tool Command Language/ToolKit (TCL, X-Windows), "TCL/TK"
TCM	Thermal Conduction Module
TCM	Time Compression Multiplexer
TCM	Trellis Coded Modulation
TCNS	Thomas Conrad Network System (LAN)
TCO	Test Cell Output (UNI, ATM)
TCO	Tjaenstemaennens CentralOrganisation (Sweden, org.)
TCO	Total Cost of Ownership
TCO	taken care of
TCO	total cost of ownership
TCOS	Telesec Chipcard Operating System (OS)
TCP	Tape Carrier Package (CPU)
TCP	Test Coordination Procedure
TCP	Transmission Control Protocol (ARPANET)
TCPA	Trusted Computing Platform Alliance (org., cryptography, DRM, TCPA)
TCPACO	TCP Alternate Checksum Option (RFC 1146, TCP), "TCP-ACO"
TCPBEUI	Transmission Control Protocol BIOS Extended User Interface (NETBIOS, TCP, UI)
TCPC	The Clean Personal Computer group (org., manufacturer, Grafikkarten)
TCPIP	Transmission Control Protocol/Internet Protocol (RFC 793, IP), "TCP/IP"
TCPLDP	TCP extensions for Long Delay Paths (RFC 1072, TCP)
TCQ	Tagged Command Queueing (Linux, SCSI)
TCRTP	Tunneling multiplexed Compressed Real Time Protocol (RTP, RFC 4170)
TCS	Transmission Convergence Sublayer (ATM)
TCSEC	Trusted Computer System Evaluation Criteria (Orange Book, NCSC, USA)
TCSH	Trustedi C SHell (Unix, Shell)
TCU	Tape Control Unit
TCU	Timing Control Unit
TCU	Transmission Control Unit
TD	Transmit Data (MODEM)
TDA	TestDatenAuswerter (IC)
TDB	Task DataBase
TDB	Track Descriptor Block (UDF, CD-R)
TDC	Tape Data Controller
TDC	Terrestrial Data Circuit
TDC	Thernal Design Current (EDC)
TDCC	Transportation Data Coordinating Committee (org., USA)
TDD	Telecommunications Device for Deaf
TDD	Test Driven Development
TDD	Time Division Duplex (mobile-systems)
TDDSG	TeldeDienstDatenSchutzGesetz telecommunication, IUKDG, Germany
TDED	Trade Data Elements Directory (ISO 7372)
TDF	Title Definition Format (DVD)
TDG	TeleDienstGesetz telecommunication, IUKDG, Germany
TDI	Test Data Input (TAP, IC)
TDI	Trusted Database Interpretation (DB)
TDJ	Transfer Delay Jitter
TDL	Trusted Device List (DCI)
TDLS	Tunneled Direct Link Setup (WLAN)
TDM	Telekom Designed Networks (DTAG)
TDM	Time Division Multiplexing
TDMA	Time Division Multiple Access (mobile-systems)
TDMB	Terrestrial Digital Multimedia Broadcasting (DMB), "T-DMB"
TDMOIP	Time Division - Multiplex Over Internet Protocol (IP, DSL), "TD-MoIP"
TDMS	Terminal Data Management System
TDN	Telekom Designed Network
TDNN	Time Delay Neural Net (NN)
TDO	Test Data Output (TAP, IC)
TDOP	Time Dilution Of Precision (GPS)
TDOS	Tape and Disk Operating System (OS, RCA Spectra 70)
TDP	Telocator Data Protocol (PCIA, SMS, USA)
TDP	Thermal Design Power (CPU, ACP, SDP)
TDP	Triton Data Path (Intel, Triton, IC)
TDR	Time Domain Reflectometer (cable)
TDS	Tabular Data Stream [protocol] (Sybase)
TDSCDMA	Time Division Synchronous Code Division Multiple Access (mobile-systems, CDMA)
TDSL	Telekom Digital Subscriber Line (DTAG, Germany), "T-DSL"
TDSV	Telekommunikation-DatenSchutzVerordnung (BMWI)
TDT	Time and Date Table (DVB, UTC)
TDU	Telesoftware Data Unit (BTX)
TE	Terminal Endpoint (ISDN)
TE	Terminal Equipment
TE	Traffic Engineering [extension] (OSPF, RFC 3630)
TE	Type Enforcement [access control] (SELinux)
TEA	Telekommunikations-Anschluss-Einheit (DTAG)
TEA	Tiny Encryption Algorithm (cryptography)
TEAMA	Taiwanese Electric Appliance Manufacturer's Association (org., Taiwan)
TEBI	TEraBInary [(2^10)^4] (IEC)
TEC	Text Encoding Converter (Apple)
TEC	Trace Execution Cache (Intel, Pentium, CPU)
TECO	Tape / Text Editor and COrrector (MIT)
TEDAX	TExt DAta eXchange [protocol] (MacOS)
TEDIS	Trade Electronic Data Interchange Systems (EDI, Europe)
TEI	Text Encoding Initiative [application] (SGML)
TELAS	TELephony Application System (CTI, SNI)
TELEVAS	Telephony Value Added Services (WAP), "TeleVAS"
TELIS	TEileLogistik-InformationsSystem (MBAG)
TELNET	TELephone NETwork (Unix, Internet, RFC 854)
TELNETD	TELephone NETwork DAEMON (Unix, TELNET, DAEMON)
TEN	TransEuropean Networks (network)
TENG	TriboElectric NanoGenerator
TER	Typo3 Extension Repository (TYPO3)
TERENA	Trans-European Research and Education Networking Association (org., Netherlands, Europe)
TERMCAP	TERMinal CAPability (Unix)
TERMINFO	TERMinal INFOrmation (Unix)
TES	Technology Enabled Marketing
TESLA	Timed Efficient Stream Loss-tolerant Authentication (RFC 4082)
TESS	The Exponential Security System (RFC 1824)
TEXEL	TEXture ELement (3D)
TF	Trace Flag (assembler)
TFCC	Task Force on Cluster Computing (IEEE, Org)
TFE	Thin Film Electronics (manufacturer, Norway, Sweden)
TFI	Terminal Facility Identifier (T-Online)
TFLOPS	Tera FLoating-point Operations Per Second (CPU, GPU)
TFM	Trusted Facility Manual
TFOA	things falling off aircraft
TFP	Tops Filing Protocol
TFRP	TCP Friendly Rate Control (TCP, RFC 3448)
TFS	Team Foundation Server (MS, ALM)
TFS	Translucent File System
TFT	Task File Table (BS2000)
TFT	Thin Film Transistor (LCD)
TFTP	Trivial File Transfer Protocol (UDP, RFC 1350/1782/1783/1784/1785)
TFTR	Trivial File Transfer Protocol
TFW	that feeling when
TGC	Terminal Group Controller
TGIF	thank goodness it's Friday
TGMS	TransGear Media Server (Transgear)
THAMA	Trident Hardware-Assisted MPEG-2/AC-3 (Trident, MPEG, DVD, AC-3)
THATIC	Tianjin Haiguang Advanced Technology Investment Corporation (manufacturer)
THD	Total Harmonic Distortion (audio)
THDN	Total Harmonic Distortion plus Noise (audio), "THD+N"
THE	Technische Hoogeschool Eindhoven (OS), "T.H.E."
THE	The Hessling Editor
THENET	Texas Higher Education NETwork (network, USA), "THEnet"
THNX	thanks
THP	Transparent Huge Pages (Linux)
THT	Token Holding Timer (FDDI, Token Ring)
THUMS	Total HUman Model for Safety (Toyota, VPD)
THX	thanks
TI	Technical Interchange (conference, IBM)
TI	Texas Instruments (manufacturer)
TIA	Telecommunications Industries Association (org.)
TIA	Thanks In Advance (slang, Usenet, IRC)
TIA	The Internet Adapter [software]
TIA	thanks in advance
TIAVP	this is a volunteer project
TIC	tonque in cheek
TID	Technical Information Document (Novell)
TID	Touch Interactive Display
TIDL	Tool Integration Description Language (JCF)
TIDSE	Techniken fuer Interaktives Storytelling und Entertainment (conference, ZGDV)
TIE	Terminal Interface Equipment
TIES	Time Independent Escape Sequence (MODEM)
TIFF	Tag / Tagged Image File Format (Aldus)
TIGA	Texas Instruments Graphics Adapter (Texas Instruments)
TIIAP	Telecommunications and Information Infrastructure Assistance Program (USA)
TIL	Tech Info Library (Apple, WWW)
TIL	today I learned
TIM	Thermal Interface Material (CPU)
TIM	Token Interface Module (Token Ring)
TIMTOWTDI	There Is More Than One Way To Do It (PERL)
TIMTOWTDI	There Is More Than One Way To Do It (PERL, slang)
TINA	Telecommunication Information Network Agent (IN)
TINA	Telecommunication Information Networking Architecture (IN)
TINAC	TINA Consortium (org., IN, TINA), "TINA-C"
TINC	There Is No Cabal! (slang, Usenet, Linux, Debian)
TINC	there is no cabal
TINLA	this is not legal advice
TINWIS	this is not what I said
TINYTP	Tiny Transport Protocol (IRDA)
TIP	Terminal Interface Processor (ARPANET)
TIP	Transputer Image Processing
TIPC	Texas Instruments Personal Computer (TI)
TIPC	Transparent Inter Process Communication [protocol]
TIPHON	Telecommunications and Internet Protocol Harmonization Over Networks (ETSI, WG)
TIPS	Truevision Image Paint Software (TI)
TIS	TPM Interface Specification (TPM)
TIS	Thai Industrial Standard
TIS	Tools Interface Standard [committee] (org., IBM, Lotus, MS, Watcom, SCO, Unix)
TISN	Tokyo International Science Network (network)
TITN	Traitement de l'Information-Techniques Nouvelles (manufacturer, France)
TJM	that's just me
TK	TeleKommunikation
TK	Temporal Key (FPK)
TKIP	Temporal Key Integrity Protocol (WEP, WLAN, WPA)
TKO	TeleKommunikationsOrdnung
TKUEV	Telekommunikations-UEberwachungsverordnung Germany
TKV	TeleKommunikationsVerordnung
TL	Telecommunication Leadership [standard] (QuEST)
TL	Too Long; Didn't Read (slang, Usenet, IRC)
TL	Transform and Lighting (3D), "T&L"
TLA	Three Letter Acronym (slang)
TLA	three letter acronym
TLA	true love always
TLAP	Token ring Link Access Protocol (LAP)
TLB	Translation Lookaside Buffer (CPU)
TLC	Triple Level Cell (Flash)
TLC	tender loving care
TLD	Top Level Domain (Internet, ICANN.)
TLDP	The Linux Documentation Project (Linux)
TLDR	Too Long; Didn't Read (slang, Usenet, IRC)
TLDR	too long, didn't read
TLER	Time Limited Error Recovery (WD, RAID)
TLG	TeleDiensteGesetz Germany
TLI	Transport Layer Interface
TLI	Transport Level Interface (AT&T)
TLN	Trunk Line Network
TLP	Thread Level Parallelism (CPU)
TLP	Transactional Licensing Program (Adobe)
TLP	Transmission Level Point
TLS	Thread Local Storage
TLS	Transport Layer Security [protocol] (SSL, TCP, RFC 2246)
TLSP	Transport Layer Security Protocol (ISO)
TLV	Type - Length - Value
TLVTTL	Terminated Low Voltage Transistor Transistor Logic
TM	TeleMail (BBS, Berlin, Germany, telecommunication)
TM	Terminal Manager (Bull, DSA)
TM	Tools for MIME (EMACS, GNU, MIME)
TM	TradeMark
TM	Traffic Management
TM	Transaction Monitor (TP)
TM	Turing Machine
TM	trademark
TM	trust me
TMA	Thinfilm Micromirror Array
TMA	too many abbreviations
TMC	Taiwan Mycomp Corporation (manufacturer)
TMC	Thinking Machines Corporation (manufacturer)
TMC	Traffic Message Channel (GPS)
TMCC	Time-Multiplexed Communication Channel
TMCL	Topic Map Constraint Language (XTM, TMQL)
TMDB	Tivoli Management Data Base (Tivoli, DB)
TMDS	Transition Minimized Differential Signaling (VESA, LCD, DVI)
TMDS	Transmission Minimized Digital Signal
TME	Telocator Message Entry [protocol] (SNPP)
TME	Tivoli Management Environment (Tivoli)
TMF	Tivoli Management Framework (Tivoli)
TMF	Transaction Monitoring Facility (DB, Tandem)
TMG	TestMusterGenerator (IC)
TMG	The Master Genealogist
TMG	too much government
TMI	too much information
TMJ	temporomandibular joint
TMK	to my knowledge
TMN	Telecommunication Management Network (IN)
TMP	Test Management Protocol
TMPDU	Test Management Protocol Data Unit (ISO 9646-1, PDU), "TM-PDU"
TMQL	Topic Map Query Language (XTM, TMCL)
TMR	Transient Memory Record
TMR	Triple Modular Redundancy
TMS	Telecommunications / Telephone Management System
TMS	Test Mode Select (TAP, IC)
TMS	Time Multiplexed Switch
TMS	Truth Maintenance System (AI)
TMSC	Tape Mass Storage Control (DEC)
TMSCP	Tape Mass Storage Control Protocol
TMSI	Temporary Mobile Subscriber Identity (MM, GSM, mobile-systems)
TMSS	[LambdaManager] Terabit MultiService Switch (Lucent, LambdaXtreme, BIT)
TMTO	Time Memory Trade-Off
TMTOWTDI	There's More Than One Way To Do It (slang, PERL)
TMTOWTDI	there's more than one way to do it
TMTP	TrackMania Transfer Protocol (HTTP, WWW)
TMU	Texture Mapping Unit (GPU)
TMU	Time Measurement Unit
TMUX	Transport MUltipleXing protocol (RFC 1692), "TMux"
TN	Terminal Node
TNC	Terminal Node Controller
TNC	Threaded Neill Concelman [connector]
TNC	Trusted Network Connect (TCG)
TNEF	Transportation Neutral Encapsulation Format (MAPI, MIME, MS)
TNF	The NetBSD Foundation
TNFS	Trusted Network File System (NFS)
TNL	Technical NewsLetter (IBM)
TNLCD	Twisted Nematic Liquid Crystal Display (LCD), "TN-LCD" 
TNMOC	The National Museum Of Computing (org., UK)
TNPC	Taiwanese New Pc Consortium (org., Taiwan)
TNS	Transit Network Selection
TNTC	Too Numerous To Count (slang, Usenet, IRC)
TNVIP	TelNet Visual Information Projection [protocol] (TELNET, VIP, RFC 1921)
TO	Template Object (TYPO3)
TOA	Target of Authentication (CC)
TOB	T-Online Billing (T-Online)
TOC	Table Of Contents (CD)
TOC	table of contents
TOCTOU	time of check to time of use
TODS	Transactions on Database Systems (ACM, DB)
TOE	TCP/IP Offline Engine (TCP/IP, IC)
TOE	Target of Evaluation (CC)
TOEFL	test of english as a foreign language
TOEM	Technical Original Equipment Manufacturer
TOFU	Text Over, Full-quote Under (slang, Usenet)
TOFU	Trust On First Use
TOH	to other half
TOKREUI	TOKen-Ring Extended User Interface (IBM, Token Ring)
TOLD	Trebor's Obnoxious Lunchmeat Detector (SPAM, Mac, Eudora)
TOM	T-Online Messenger (T-Online, IM)
TOMS	Transactions on Mathematical Software (ACM)
TOOIS	Transactions on Office Information Systems (ACM)
TOOL	[conference on] Technology of Object-Orientated Languages and Systems (OOP, conference)
TOP	Technical and Office Protocols
TOP	The OS-9 Project (OS-9)
TOPICS	Total On-Line Program and Information Control System
TOPLAS	Transactions on Programming Languages and Systems (ACM)
TOPS	Timesharing / Total OPerating System (DEC, OS)
TOS	Tape Operating System (OS, RCA Spectra 70)
TOS	Teletype Operating System (OS, Microdata)
TOS	The Operating System (Atari, OS)
TOS	Tramiel Operating System (Atari, OS)
TOS	Type Of Service (IP)
TOS360	Tape ??? Operating System /360 (IBM, S/360, OS), "TOS/360"
TOSMAPDS	TOShiba Microprocessor Aided Power system control - DynaStream (DCS, Toshiba), "TOSMAP-DS"
TOT	Time Offset Table (DVB)
TOT	Totally Off-Topic (slang, Usenet, IRC)
TOTP	Time-based One-time Password
TP	Transaction Processing
TP	Turbo Pascal (Borland)
TP	Twisted Pair [cable] (LAN)
TP	toilet paper
TP0	Transport Protocol class 0 (OSI)
TP4	Transport Protocol class 4 (OSI)
TPA	Third Party Applications
TPA	Transient Program Area (DOS)
TPC	The PERL Conference (PERL)
TPC	Transaction Processing Council (org., manufacturer, DB)
TPC	Transmit Power Control (HiperLAN/2, WLAN)
TPCC	TPC benchmark C (TPC), "TPC-C"
TPCC	Third Party Call Control
TPCE	TPC benchmark E (TPC), "TPC-E"
TPCH	TPC benchmark H (TPC), "TPC-H"
TPCW	TPC benchmark W (TPC, WWW), "TPC-W"
TPD	Technical Product Documentation
TPDDI	Twisted Pair Distributed Data Interface (FDDI, STP, Chipcom)
TPDU	Transport Protocol Data Unit (OSI, OSI/RM, PDU, ICC)
TPE	Twisted Pair Ethernet (ethernet)
TPF	Transaction Processing Facility (IBM, MVS/XA)
TPI	Tracks Per Inch (HDD)
TPM	Traditional Power Management
TPM	Transactions-Per-Minute
TPM	Trusted Platform Module (TCPA)
TPMS	Transaction Processing Management System
TPPMD	Twisted Pair Physical layer Medium Dependent (FDDI), "TP-PMD" 
TPQ	True Phone Quality (CAT)
TPR	Task Priority Register (IC)
TPRM	Transaction Programmer's Reference Manual (Sun)
TPS	TeleProcessing Systeme [gmbh] (provider)
TPS	Transaction Processing System
TPS	Transactions Per Second (DB, DBMS)
TPT	Twisted Pair Transceiver
TPTB	the powers that be
TPU	Turbo Pascal Unit (TP, Borland)
TPW	Turbo Pascal for Windows (Borland)
TQ	Tagged Queuing (SCSI, HDD)
TR	Task Register (CPU, Intel, assembler, IC)
TR	Technical Report (DSL-Forum, WT)
TR	Technology Refresh (IBM)
TRAP	Tandem Recursive Algorithm Process
TREC	Text REtrieval Conference (Konferenz)
TREC	Texture and Rendering Engine Compression
TRIB	Transfer Rate of Information Bits (BIT)
TRIF	Tiled Raster Interchange Format
TRILL	Transparent Interconnection of Lots of Links (RFC 5556)
TRIP	Telephony Routing over IP (IP, RFC 3219)
TRIPS	Trade Related aspects of Intellectual Property rightS (GATT)
TRIZ	Teorija Reschenija Isobretatelskich Zadatsch
TRM	Technical Reference Model
TRMM	Token Ring Management Module (Token Ring)
TRNG	True Random Number Generator
TROFF	Typesetter New Run-OFF (Unix)
TROLI	Token Ring Optimized Link Interface (Token Ring)
TRON	The Realtime Operating system Nucleus
TRP	Token Ring serial Port
TRR	Token Ring Repeater
TRR	Trusted Recursive Resolver (DNS)
TRT	The Right Thing (slang, Usenet, IRC)
TRT	Token Rotation Timer (FDDI, Token Ring)
TRT	the right thing
TS	Time Slot
TS	Time Stamp
TS	Traffic Shaping
TS	Transport Stream
TS	TriState (IC)
TSA	Target Service Agent (Novell, Netware, SMS)
TSA	Telecommunication Society of Australia (org., Australia)
TSAD	Transmit Service Availability Data (CIU, IBM)
TSANET	Technical Support Alliance NETwork (org., manufacturer, Lotus, Oracle, HP, ...), "TSANet"
TSAP	Transport Service Access Point (OSI, OSI/RM, SAP)
TSAPI	Telephony Server Application Programmer Interface (AT&T, Novell, API)
TSC	Time Stamp Counter (IC, Intel, Pentium)
TSC	Triton System Controller (Intel, Triton, IC)
TSCT	Tangan Silence Control Technology (Tangan)
TSD	Ton-Saettigung-Dunkelstufe (color system)
TSDU	Transport Service Data Unit (OSI, OSI/RM)
TSE	Technical Support Engineer (Sun)
TSE	TestSteuerEinheit (IC)
TSE	[Windows] Terminal Server Edition] (Windows, MS)
TSEE	Technical System Engineering Environment (Westmount, CASE)
TSF	TOE Security Functions (CC, TOE)
TSFE	TypoScript Front End (TYPO3)
TSI	Time Slot Interchanger
TSIG	Trusted Systems Interoperability Group (org.)
TSM	Text Service Manager (Apple)
TSM	Time Sharing Monitor (OS, IBM)
TSM	Tivoli Storage Manager (Tivoli, IBM)
TSM	Topology Specific Module (ODI)
TSM	Trusted Service Manager (mobile-systems, TSP)
TSMC	Taiwan Semiconductor Manufacturing Company (manufacturer, Taiwan)
TSMP	True Symmetric MultiProcessor
TSN	Task Sequence Number (BS2000)
TSO	Telecommunications Service Order
TSO	Time Sharing Option
TSOCMS	Time Sharing Option/Conversational Monitor System (IBM, VME), "TSO/CMS"
TSOE	Time Sharing Option/Extensions (IBM), "TSO/E"
TSOP	Thin Small Outline Package (DRAM, IC)
TSP	Texture and Shading Processor (IC, graphics)
TSP	Time Synchronization Protocol
TSP	Travelling Salesman Problem
TSP	Trusted Service Provider (mobile-systems, TSM)
TSP1	Test Synchronization Protocol 1+ (TTCN, ETSI), "TSP1+"
TSPI	TAPI Service Provider Interface (TAPI)
TSR	Terminate and Stay Resident
TSS	Task State Segment (Intel)
TSS	Time-Sharing System
TSSDC	Task State Segment Descriptor Cache (CPU)
TSST	Toshiba Samsung Storage Technologies (manufacturer)
TSTN	Triple SuperTwisted Nematic (LCD)
TSTS	Transaction and Switching and Transport Services (BELLCORE)
TSV	Through Silicon Vias
TSW	TeleSoftWare (T-Online)
TSX	TimeSharing eXecutive (OS, IBM, IBM 1800)
TTBOMK	to the best of my knowledge
TTCAN	Time Triggered Communication on Controller Area Network (CAN)
TTCN	the Tree and Tabular Combined Notation (OSI, IUT)
TTF	TrueType Font
TTFF	Time To First Fix (GPS)
TTFN	Ta-Ta For Now (slang, Usenet, IRC)
TTFN	ta ta for now
TTG	Transmit Time Gap
TTKC	The Thursday Killers Clan (user group)
TTL	TietoTekniikan Liitto [ry] (org., Finland)
TTL	Time To Live (IP)
TTL	Transistor Transistor Logic
TTLS	Tunneled Transport Layer Security [protocol] (TLS, SSL, WLAN)
TTM	to the moderator
TTML	Tagged-Text Markup Language (Nokia, mobile-systems)
TTP	Time Triggered Protocol
TTP	Tiny Transmission Protocol (IRDA, IRLMP)
TTP	Trusted Third Parties (cryptography)
TTRP	Time Token Rotation Protocol (FDDI)
TTRT	Target Token Rotation Time (FDDI)
TTS	Text To Speech [system]
TTS	Transaction Tracking System (DB, Netware)
TTS	Trouble Ticketing System
TTT	thought that too
TTW	Through The Web (WWW, ZMI, ZOPE)
TTY	TeleTYpe
TTYL	Talk To You Later (slang, Usenet, IRC)
TTYL	talk to you later
TTYS	talk to you soon
TUB	Technische Universitaet Berlin (org.)
TUBA	TCP and UDP with Bigger Addresses (TCP, UDP, RFC 1347)
TUC	Total User Cell count (UNI)
TUCAA	The Ultimate Computer Acronyms Archive (Internet, WWW)
TUCD	Total User Cell Difference (UNI)
TUE	Trusted User Engine (NGSCB, MS, Palladium)
TUG	TeX User's Group (org., user group, TeX)
TUHS	The Unix Heritage Society (org., Unix)
TUI	Text-Based User Interface (UI)
TUM	Technische Universitaet Muenchen (org.)
TUNIS	Toronto UNIversity System (OS)
TUP	Telephone User Path (ISDN)
TUT	Transistor Under Test
TUX	Torvalds UniX (Linux), "Tux"
TVOL	TV OnLine cable service (WorldGate, Internet)
TVOS	Terminal Velocity Operating System (3drealms)
TVS	Transparent Voice Signalling (VOFR)
TVST	TeilnehmerVermittlungsSTelle (DTAG), "TVSt"
TWAIN	Technology Without An Important Name
TWAIN	thing without an interesting name
TWB	Terrestrial Wide-Band [networking]
TWDT	the whole damn thing
TWIAVBP	the world is a very big place
TWINKLE	The Weizman INstitute Key Locating Engine (cryptography)
TWIP	[one] TWentIeth of a Point [1 inch = 72 points] (DTP)
TWOS	Time Warp Operating System (OS, Hypercube)
TXE	Trusted eXecution Engine (Intel)
TXGA	Tesselar XGA [1920x1400] (XGA)
TXT	Trusted eXecution Technology (AMT)
TXTRR	TXT Resource Record (DNS, RFC 1035), "TXT-RR"
TY	thank you
TYVM	thank you very much
TZ	Time Zone (Internet, TZ)
U/L	upload
U2F	Universal Second Factor (FIDO-Alliance)
U3D	Universal 3 Dimensional [format] (3D)
UA	Unnumbered Acknowledgement
UA	Upgrade Advantage (MS)
UA	User Agent (MHS, OSI)
UAA	Universal Audio Architecture (MS, Windows, XP)
UAA	UnternehmensAnwendungsArchitektur (IM)
UAAG	User Agent Accessibility Guidelines (WAI)
UAB	Unix Appletalk Bridge (Apple, AppleTalk, Unix)
UAC	Universal Access Control (IBM)
UAC	User Account Control (MS, Windows, Vista)
UADPS	Uniform Automatic Data Processing System
UADSL	Universal Asymmetric Digital Subscriber Line (DSL, ADSL)
UAE	Universal Amiga Emulator (Amiga)
UAE	Unknown / Unrecoverable Application Error (Windows)
UAF	Universal Authentication Framework (FIDO-Alliance)
UAF	User Authorization File
UAP	User Account Protection (MS, Windows, Vista)
UAPDU	User Agent Protocol Data Unit (PDU)
UART	Universal Asynchronous Receive and Transmit
UAS	USB-Attached SCSI (USB, SCSI)
UAS	UnAvailable Seconds (DS1/E1, DS3/E3)
UASP	USB Attached SCSI Protocol (USB, SCSI)
UAWG	Universal ADSL Working Group (Org, ADSL, DSL)
UBA	UniBus Adapter (DEC)
UBC	Unified Buffer Cache
UBE	Unsolicited Bulk Email (spam, Internet, UCE)
UBL	Universal Business Language (OASIS, XML)
UBNI	Ungermann-Bass Network Interface
UBR	Unspecified Bit Rate (ATM, CBR, VBR, ABR, QOS, BIT)
UBSAN	Undefined Behavior Sanitizer (GCC), "UBSan"
UBU	UEFI BIOS Updater
UC	Universal Code (Internet)
UC	User Customization (mobile-systems)
UCA	Utility Communication Architecture
UCC	Uniform Code Council (USA)
UCC	Uniform Commercial Code
UCE	Unsolicited Commercial E-mail (Usenet, spam, UBE)
UCFF	Ultra Compact Form Factor
UCI	User-Computer Interface
UCITA	Uniform Computer Information Transaction Act (USA, DRM)
UCLA	University of California at Los Angeles (org., USA)
UCLAVM	UCLA Virtual Machine (OS, UCLA, VM), "UCLA VM"
UCM	[rational] Unified Change Management (IBM, DCT, SCM)
UCP	Universal Computer Protocol (SMS, Europe)
UCR	Under Color Removal (DTP)
UCS	Unified Computing System (Cisco)
UCS	Univention Corporate Server
UCS	Universal Classification System
UCS	Universal [multiple-octet] coded Character Set (ISO, IEC, DIS 10646, Unicode)
UCSB	University of California at Santa Barbara (org. USA)
UCSD	University California San Diego (org., USA)
UDA	Unified Driver Architecture (Nvidia)
UDB	Universal DataBase [server] (IBM, DB)
UDC	Universal Decimal Classification
UDC	Universal Display Corporation (manufacturer)
UDDI	Universal Description, Discovery and Integration of business for the web (org., WWW, XML)
UDF	Universal Disc Format (CD, OSTA)
UDF	User Defined Function
UDI	Unified Display Interface
UDIAGS	Und Das Ist Auch Gut So (slang, Usenet, IRC)
UDIMM	Unbuffered Dual Inline Memory Module
UDK	UmweltDatenKatalog (NUIS-SH)
UDK	Unreal Development Kit
UDLI	Unified Design Language for integrated circuits / I (HDL), "UDL/I"
UDMA	Ultra Direct Memory Access (DMA, ATA)
UDO	Ultra Density Optical (Plasmon, HP, ECMA 350, ISO/IEC 17345)
UDO	User Defined Objects
UDOR	Ultra Density Optical - Recordable (UDO), "UDO-R"
UDORW	Ultra Density Optical - ReWritable (UDO), "UDO-RW"
UDP	Usenet Death Penalty (Usenet, spam)
UDP	User Datagram Protocol (Internet, RFC 768)
UDPIP	User Datagram Protocol / Internet Protocol (IP), "UDP/IP" 
UDRP	Uniform [Domain-name] Dispute Resolution Policy (ICANN)
UDSL	Universal Digital Subscriber Line
UDT	User-defined DataType (DB)
UDVM	Universal Data Voice Multiplexer
UE	User Equipment (mobile-systems, UMTS, GSM)
UEFI	Unified Extended Firmware Interface
UEIDE	Ultra Enhanced Integrated Drive Electronics (IDE, HDD)
UER	Unrecoverable Error Rate
UEV	User End of Volume
UFED	Universal Forensic Extraction Device (Cellebrite)
UFS	Universal File System
UFS	Universal Flash Storage (JEDEC)
UFS	Unix File System (Unix)
UFST	Universal Font Scaling Technology (Agfa)
UGT	universal greeting time
UHA	Ultra High Aperture [ratio] (LCD, TNLCD)
UHC	United Hitech Corporation (manufacturer, Taiwan)
UHCI	Universal Host Controller Interface (USB, Intel, VIA, OHCI)
UHD	Ultra HD [3840x2160] (HD)
UHF	Ultra High Frequency
UHL	User Head Label
UHS	Ultra High Speed (SD)
UI	Unix International (manufacturer, Unix)
UI	User Interface
UIC	User Identification Code
UID	Unit IDentifier (cryptography, EES)
UID	User IDentification
UIDL	Unique ID Listing (POP3, RFC 1939)
UIEE	Universal Information Exchange Environment (AWS)
UIL	User Interface Language
UIMA	Unstructured Information Management Architecture (IBM)
UIMS	User Interface Management System
UIN	Universal Identification Number (ICQ)
UIQ	User Interface Quartz (Symbian)
UIS	UmweltInformationsSystem
UISRM	User Interface System Reference Model
UJSR	Umbrella Java Specification Request (JCP, Java)
UKERNA	United Kingdom Education and Research Networking Association (org., UK)
UKOLN	United Kingdom Office for Library and information Networking (org.)
UL	United Linux (Linux)
ULA	Uncommitted Logic Array
ULA	Unique Local Address (IP, IETF)
ULANA	Unified Local Area Network Architecture
ULC	UltraLightClient (Java, RIA, WWW)
ULCC	University of London Computer Center (org., UK)
ULCE	United Linux Certified Expert (Linux)
ULCP	United Linux Certified Professional (Linux)
ULD	Unabhaengiges Landeszentrum fuer Datenschutz [Schleswig Holstein] (org.)
ULMB	Ultra Low Motion Blur (Nvidia)
ULN	Unbreakable Linux Network (Oracle, Linux)
ULP	Upper Layer Protocols (FC)
ULS	User Location Interface
ULSI	Ultra Large Scale Integration
ULV	Ultra Low Voltage
UMA	Unified Memory Architecture
UMA	Universal Measurement Architecture (Unix, X/Open)
UMA	Upper Memory Area (Intel)
UMADS	Universal Measurement Architecture Data Storage (UMA)
UMB	Upper Memory Block (Intel, UMA)
UMC	United Microelectronics Corporation (manufacturer)
UMD	Universal Media Disk (Sony)
UMDF	User-Mode Driver Framework (KMDF, MS, Windows, Vista)
UME	UNI Management Entity (UNI, ILMI)
UML	Unified Method Language (CASE, DB, OMG)
UML	Unified Modelling Language (OOP)
UML	User Mode Linux (Linux)
UMPC	Ultra Mobile Personal Computer (PC)
UMS	Unified Messaging System
UMTS	Universal Mobile Telecommunications System (IN, mobile-systems)
UNA	Universal Network Architecture
UNARP	UNsolicited Address Resolution Protocol (ARP, RFC 1868)
UNB	Ultra-Narrow-Band [modulation] (WAN, LP-WAN, IoT)
UNC	Universal Naming Convention (IBM, MS, Novell, LAN)
UNCEFACT	United Nations CEFACT (org., CEFACT), "UN/CEFACT"
UNCID	UNiform rules of Conduct for Interchange of Trade data by teletransmission (EDIFACT)
UNCLE	Unix Net for Computer security in Law Enforcement (org., USA, Unix), "U.N.C.L.E."
UNEDIFACT	United Nations EDIFACT (ISO 9735, EDIFACT), "UN/EDIFACT"
UNGTDI	United Nations Guidelines for Trade Data Interchange (UN/EDIFACT, predecessor), "UN/GTDI"
UNI	Universal Network Interface (Cogent)
UNI	User Network Interface
UNICS	UNiplexed Information and Computing Service (OS, MULTICS, Bell)
UNIKOPS	UNIversell KOnfigurierbare sicherheitsloesung fuer cyber-Physikalische Systeme
UNITE	Ubiquitous aNd Integrated Teamwork Environment (SIT)
UNIVAC	UNIVersal Automatic Computer
UNMA	Unified Network Management Architecture
UNSM	United Nations Standard Message, (UN/EDIFACT)
UNTDED	United Nations Trade Data Elements Directory (EDIFACT)
UNTDID	United Nations Trade Data Interchange Directory (EDIFACT)
UP	Uni Processor [system]
UPA	Ultra Port Architecture (Sun, SMP)
UPA	Usability Professionals Association (org.)
UPAM	User Primary Access Method (BS2000)
UPC	Universal Product Code (EAN)
UPC	Usage Parameter Control (UNI, ATM)
UPD	UserParameterDaten (DDBAC)
UPL	User Program Language
UPM	Umdrehungen Pro Minute (HDD)
UPM	User Profile Management (IBM)
UPN	Umgekehrte Polnische Notation
UPNP	Universal Plug 'N Play (PNP), "UPnP"
UPP	Universal Procedure Pointer (AE, Apple)
UPPS	Universal Portable Protocol Stack / Support (Schneider & Koch)
UPS	Uninterruptible Power Supply
UPS	Unix Print Services (Unix)
UPT	Universal Personal Telecommunications [number] (IN, mobile-systems)
UPT	Universelle Personengebundene Telekommunikation (IN)
UR	your
UR	{you're, you are}
UR2	??? (DTAG, T-DSL), "U-R2"
URA	Uniform Resource Agent (WWW)
URB	USB Request Block (USB)
URC	Uniform Resource Citation (WWW)
URC	Uniform Resources Characteristics (URI, WWW)
URI	Universal Resource Identifier (WWW, RFC 1630/2396)
URL	Uniform Resource Locator (WWW, RFC 1738)
URN	Uniform Resource Name (WWW, RFC 1737)
URSN	Unique Resource Serial Number (URI, WWW)
US	Unit Separator (BTX, VPCE)
USA	United Software Association (org., USA)
USACNII	US Advisory Council on the National Information Infrastructure (org., USA)
USART	Universal Synchronous Asynchronous Receiver / Transmitter (IC)
USB	Universal Serial Bus (Intel, USB)
USBDDK	Universal Serial Bus Driver Development Kit (USB, DDK), "USB-DDK"
USBIF	Universal Serial Bus Implementers Forum (org., USB), "USB-IF"
USBOTG	Universal Serial Bus - On The Go (USB), "USB-OTG"
USBPD	Universal Serial Bus - Power Delivery (USB), "USB-PD"
USCP	Unicos Station Call Processor [protocol] (Cray, MPP)
USD	User's Supplementary Documents (BSD, Unix)
USDC	Universal Switched Data Capability [consortium] (LCD, org.)
USDN	United States Digital Network
USEC	User-based SECurity [model] (SNMP)
USENET	USErs' NETwork (Internet)
USF	Uplink State Flag (GPRS, mobile-systems)
USFF	Ultra-Small Form Factor
USG	Universal Subscriber Gateway (Nomadix)
USG	Unix Support Group (org., Unix)
USI	Usage State Information (CPCM, DVB)
USIM	Universal Subscriber Identity Module (mobile-systems, UMTS)
USITA	United States Independent Telephone Association (org., USA)
USL	Unix Systems Laboratories (AT&T, Unix)
USM	User-based Security Model (SNMP, RFC 2574)
USMT	User State Migration Tool (MS, Windows, Vista)
USMTF	United States Message Text Format (USA)
USN	Update Sequence Number (AD)
USP	Universal Storage Platform (HDS)
USP	User Stack Pointer
USR	U.S. Robotics (manufacturer)
USR	User Service Routines
USRP	Universal Software Radio Peripheral
USRT	Universal Synchronous Receiver/Transmitter (IC)
USS	Unix Support Services (z/OS, IBM)
USSD	UnStructured Supplementary Services (GSM, mobile-systems)
USSP	User Space Serial Port (Bluetooth)
USTA	United States Telephone Association (org., USA)
USV	Unterbrechungsfreie Strom-Versorgung
USWC	Uncached Speculative Write Combining (CPU)
UT	Universal Time [+0000] (TZ, GMT)
UT	Upper Tester
UTC	Universal Time Coordinated (DCE)
UTC	Universal Time Coordinates [+0000] (TZ, GMT)
UTF	UCS Transformation Format (Unicode, UCS)
UTI	Universal Text Interchange
UTL	User Trailer Label
UTLB	Unified Translation Look-aside Buffer (CPU)
UTM	Unified Threat Management (Funkwerk)
UTM	Universal Transaction Monitor
UTM	Universeller TransaktionsMonitor (BS2000, Sinix, TP)
UTMS	Universal Mobile Telecommunications System
UTOPIA	Universal Test & Operations Physical layer Interface for ATM (PL, ATM)
UTP	Unshielded Twisted Pair [cable] (TP)
UTRAN	UMTS Terrestrial Radio Access Network (UMTS, mobile-systems)
UTS	Universal Timesharing System
UTSL	Use The Source, Luke (telecommunication, Usenet, IRC)
UTSL	use the source, Luke
UTTC	Universal Tape-To-Tape Converter
UUCICO	Unix to Unix Copy Incoming Copy Outgoing (Unix)
UUCP	Unix to Unix Copy Protocol (Unix)
UUG	Unix User Group (org., Unix, user group)
UUID	Universal Unique IDentifier
UUNET	Unix to Unix NETwork (org., ISP)
UUT	Unit-Under-Test
UVD	Unified Video Decoder (AMD)
UVL	User Volume Label
UVLC	Universal Variable Length Coding
UVM	User Verification Manager (IBM, ESS)
UW	Ultra Wide [SCSI] (SCSI)
UWA	Universal Widget API (API, Netvibes)
UWB	Ultra WideBand (MBOA)
UWP	Universal Windows Platform (MS, Windows)
UWXGA	Ultra Wide XGA [1600x768] (XGA)
UXGA	Ultra eXtended Graphics Adapter [1600 x 1200] (XGA)
UXSS	Universal Cross-Site Scripting (WWW, XSS)
V4L	Video 4 Linux (video, Linux)
VA	Virtual Acoustic
VA	Vulnerability Assessment (Firewall, TrendMicro)
VAAPI	Video Acceleration API (Intel)
VAC	Valve Anti Cheat [module/system]
VAC	Visual Age C++ (IBM)
VACP	View-based Access Control Protocol (SNMP, RFC 2575)
VACS	Visual Access Control System (SNI, CCD)
VAD	Value Added Driver
VAD	Voice Activity Detection (GSM, mobile-systems)
VADD	Value Added Disk Driver
VADD	VisualAge Developper Domain (IBM)
VAFC	VESA Advanced Feature Connector (VESA)
VAG	VRML Architecture Group (org., VRML)
VAGI	VESA Advanced Graphic Interface (VESA)
VAIO	Video Audio Integrated Operation (Sony)
VAJ	VisualAge for Java (Java, IBM)
VAM	Verband der Anbieter von Mobilfunkdiensten (org.)
VAMAS	Versailles project on Advanced Materials And Standards (ISO)
VAN	Value Added Network
VANS	Value Added Network Services
VAP	Value Added Process (Netware, NLM, predecessor)
VAPI	Virtual [ISDN] Application Programming Interface (ISDN, CAPI, API)
VAPI	Voyetra Applications Program Interface (API)
VAR	Value-Added Reseller
VAROS	VAriable Refraction Optical System (Canon)
VAS	Value Added Services
VASCAR	Visual Average Speed Computer And Recorder
VASP	Vienna Ab initio Simulation Package
VAST	Virtual Archive Storage Technology
VAT	[UDF] Virtual Allocation Table (UDF, CD-R)
VATM	Verband der Anbieter von Telekommunikations- und Mehrwertdiensten Org., telecommunication, Germany
VAX	Virtual Address eXtension (DEC, VAX)
VAXELN	Virtual Address eXtension Executive for Local area Networks (OS, DEC)
VB	Visual BASIC (MS, BASIC, VB)
VBA	Visual BASIC for Applications (MS, BASIC, VB)
VBCCE	Visual Basic Control Creation Edition (VB, MS)
VBE	VGA standard BIOS Extensions (VESA, VGA, BIOS)
VBE	Visual BASIC Editor (MS, VB)
VBIDE	Visual BASIC Integrated Development Environment (MS, VB)
VBN	Vermittelndes Breitband-Netz
VBNS	Very highspeed Backbone Network Service (NSF, ATM), "vBNS"
VBO	Vertex Buffer Object (NVSG)
VBR	Variable Bit Rate (ATM, CBR, ABR, UBR, QOS, BIT)
VBRNRT	Variable Bit Rate - Non Real Time (VBR, ATM, BIT), "VBR-NRT"
VBRRT	Variable Bit Rate - Real Time (VBR, ATM, BIT), "VBR-RT"
VBS	Visual Basic Script (MS, BASIC, VB)
VBX	Visual Basic eXtensions (MS)
VC	Virtual Channel / Circuit (ATM)
VC	Virtual Console
VC	Visual c/c++ compiler (MS)
VCA	Voltage Controlled Amplifier (audio)
VCC	Virtual Channel Connection (ATM)
VCD	Video Compact Disk (CD)
VCE	Vision Computing Engine
VCEG	Video Coding Experts Group (org., ITU-T)
VCF	Voltage Controlled Filters
VCI	Video Cursor Interface (VESA)
VCI	Virtual Channel Identifier (ATM)
VCI	Virtual Connection Identifier (ATM)
VCL	Video Coding Layer (AVC)
VCL	Virtual Channel Link (UNI, ATM)
VCL	Visual Class Library (StarOffice)
VCL	Visual Component Library (Borland, Delphi)
VCM	Windows Conflict Manager (MS, Windows)
VCO	Voltage Controlled Oscillator
VCOS	Visible Caching Operating System (DSP)
VCP	Vector Control Processor
VCPI	Virtual Control Program Interface (DOS, Intel)
VCQ	Vibrant Colour Quality (Matrox)
VCR	video cassette recorder
VCRC	Variant Cyclic Redundancy Check (Infiniband), "V-CRC"
VCS	Virtual Circuit System
VCSA	, "vCSA"
VCSDRAM	Virtual Channel - Synchronous Dynamic Random Access Memory (RAM, DRAM, IC, NEC), "VC-SDRAM"
VCSEL	Vertical-Cavity Surface Emitting LASER
VCVS	Virtual Concurrent Version System (CVS), "vCVS"
VD	Virtual Data (grid)
VDAFS	Verband Deutscher Automobilhersteller FlaechenSchnittstelle (DIN, CIM)
VDASEDAS	Verband Deutscher Automobilhersteller / Standardisiertes Einheitliches DatenAustauschSystem (EDI), "VDA/SEDAS"
VDD	Virtual Display Driver
VDDM	Vista Display Driver Model (MS, Windows, Vista)
VDE	Verband Deutscher Elektrotechniker [e.v.] (org.)
VDGA	Virtual Dedicated Graphics Acceleration (VMware, vSGA), "vDGA"
VDI	Verein Deutscher Ingenieure (org.)
VDI	Video Device Interface (Intel)
VDI	Virtual Desktop Infrastructure (Sun)
VDI	Virtual Device Interface
VDIF	VESA Display Information File (VESA)
VDM	Virtual DOS Machine (OS/2, Windows NT, DOS)
VDMA	Virtual Direct Memory Access (DMA)
VDMAD	Virtual Direct Memory Access Device (VDMA, DMA)
VDOP	Vertical Dilution Of Precision (GPS)
VDPAU	Video Decode and Presentation API for Unix (Nvidia, API)
VDS	Virtual DMA Services (DMA)
VDSL	Very high data / bit rate Digital Subscriber Line (DSL, BIT)
VDSO	Virtual Dynamically linked Shared Objects
VDT	Video Display Terminal
VDU	Visual Display Unit
VDV	Vorbestellte DauerwaehlVerbindung (DTAG)
VE	Virtual Environment (VR)
VEBSN	Virtual European Seismic Network
VEC	Virtual Embedded Circuitry (IC)
VEG	Very Evil Grin (slang, Usenet, IRC)
VEG	very evil grin
VEIL	Video Encoded Invisible Light Technology (VEIL)
VEP	Visual Editor Project (GUI, Java, Eclipse)
VERA	Just playing around, huh?
VERNET	Virginia Educational Research NETwork (network, USA), "VERnet"
VERONICA	Very Easy Rodent-Orientated Netwide Index of Computerized Archives (Internet)
VERP	Variable Envelope Return Path (SMTP)
VES	Virtual Execution System (MS, CLR, .NET)
VESA	Video Electronics Standards Association (org.)
VEST	VAX Environment Software Translator (VAX, DEC)
VF	Vacuum Flourescent [technology]
VFAT	Virtual File Allocation Table (MS, Windows 95, FAT)
VFC	V. Fast Class (MODEM), "V.FC"
VFD	Vacuum Fluorescent Display
VFEA	VMEbus Futurebus+ Extended Architecture
VFIO	Virtual Function Input-Output (Linux, IO)
VFIR	Very Fast IRDA (IRDA)
VFS	Virtual File System [layer] (Unix, Linux, OSF/1)
VFS	Virtual Filesystem Switch (FreeBSD)
VFW	Video fuer Windows (MS), "VfW"
VG	Volume Group (LVM)
VGA	Video Graphics Array (IBM)
VGB	Virtual GameBoy
VGDA	Volume Group Descriptor Area (AIX, LVM, IBM)
VGF	100VoiceGrade anylan Forum (manufacturer)
VGI	Virtual Graphics Interface
VGPU	Virtual Graphics Processing Unit (GPU), "vGPU"
VHDCI	Very High Density Cable Interconnect (SCSI)
VHDL	VHSIC Hardware Description Language (ASIC)
VHF	Very High Frequency
VHLL	Very High Level Language
VHRCD	Very High Resolution Color Display
VHSIC	Very High Speed Integrated Circuit
VI	VIsual editor (Unix)
VI	Virtual Interface (Compaq, Intel, MS, Infiniband)
VIA	VAX Information Architecture (VAX, DEC)
VIA	Virtual Interface Architecture
VIAD	VESA Image Area Definition (VESA)
VIC	V.35 Interface Cable (cable)
VIC	Vendor Independent Calendaring (VIM)
VIC	Video Interface Controller (video, C64)
VICE	VersatIle Commodore Emulator
VICI	Visual Interface ConsortIum (org.)
VID	Voltage IDentification (CPU)
VIDIX	VIDeo interface for *niX (Unix, video)
VIDL	VIrus Description Language, "ViDL"
VIF	Virtual Interrupt Flag (Intel, CPU)
VIFA	Victoria Free-Net Association (org., USA)
VILE	VI Like EMACS (Unix, VI, EMACS)
VIM	VI Improved (VI, Unix)
VIM	Vendor Independent Messaging (Lotus, Borland, IBM, Novell, API)
VIMF	Vierer [kabel] In MetallFolie (VDE, SQ), "ViMF"
VINCE	Vendor Independent Network Control Entity
VINES	VIrtual NEtwork Service (Banyan, VINES, NOS)
VIO	Virtual Input/Output
VIOLA	Vertically Intergrated Optical Testbed for Large Applications (DFN)
VIOP	Variable Input/Output Port (I/O, Qualstar)
VIP	VINES Internetwork Protocol (VINES)
VIP	VLB - ISA - PCI [board] (VLB, ISA, PCI)
VIP	Virtual Internet Protocol [address] (IP)
VIP	Visual Information Projection [terminal] (Bull)
VIP	very important person
VIPNET	Voice Interactive Paging Network (network, MAN), "VIP-Net"
VIPT	Virtually Indexed, Physically Tagged (Intel, CPU)
VIQR	VIetnamese Quoted-Readable [specification] (VISCII, RFC 1456)
VIR	Visual Information Retrieval (DB, Informix)
VIROS	VIRtual memory Operating System (DEC, OS)
VIRTUE	Virtual Team User Environment (VR, TUB)
VIS	Verlaessliche InformationsSysteme (GI)
VIS	Virtual Instruction Set (Sun, CPU)
VIS	Visual Interactive Simulation
VISCII	VIetnamese Standard Code for Information Interchange
VISYON	Variables Intelligentes Synchrones Optisches Netz (SNI, SDH)
VITAL	VHDL Initiative Toward ASIC Libraries (ASIC, VHDL)
VITC	Vertical Interval Time Code (video)
VK	VideoKonferenz
VKI	Variable Keyframe Interface (DivX, video)
VKI	Verteilte Kuenstliche Intelligenz (KI, DAI)
VL	Virtual Lane (Infiniband)
VLA	Volume Licence Agreement (Novell, Apple)
VLAN	Virtual Local Area Network (LAN, IEEE 802.1q/80210), vowlan
VLB	VESA Local Bus (VESA)
VLC	Variable Length Coding (AVC)
VLC	Video LAN Client (LAN, video, Mac, Dbox)
VLD	Variable Length Decoder (MPEG)
VLDB	Very Large DataBase (DB)
VLF	Very-Low-Frequency Band
VLF	Virtual Lookaside Facility (IBM)
VLIW	Very Long Instruction Word (CPU, IC)
VLK	Volume License product Key (MS)
VLM	Virtual Loadable Module (Novell, Netware)
VLM	Volume Logical Module (IBM, OS/2)
VLR	Visitor Location Register (LR, GSM, GPRS, mobile-systems)
VLSI	Very Large Scale Integration
VLSM	Variable Length Subnet Mask (Internet)
VM	Virtual Machine (IBM, OS, IBM 370, ESA, IBM 390)
VM	Virtual Memory (OSF)
VMA	VSphere Management Assistant (VSAN), "vMA"
VMA	Virtual Memory Address
VMB	Virtual Machine Boot (IBM, OS/2)
VMBR	Virtual Machine Based Rootkit
VMC	VESA Media Channel (VESA)
VMC	Virtual Machine Console (VMware)
VMCF	Virtual Machine Communications Facility (IBM, VM)
VMCMS	Virtual Machine / Conversational Monitoring System (IBM, VM), "VM/CMS" 
VMD	Virtual Manufacturing Device (MMS)
VME	Virtual Machine Environment (IBM, VM)
VME	Virtual Mobile Engine (Sony, PSP)
VMESA	Virtual Machine / Enterprise Systems Architecture (IBM, VM, ESA, CMS), "VM/ESA"
VML	Vector Markup Language (XML, MS, Macromedia, ..., PGML, SVG)
VMM	Virtual Machine / Memory Manager (IBM, VM)
VMM	Virtual Machine Monitor (VM)
VMOS	Vertical Metal Oxide Semiconductor (IC), "V-MOS"
VMP	Vector Microcode Machine
VMP	Virtual MultiPorting (POWER, CPU)
VMS	Virtual Memory [operating] System (DEC, OS)
VMS	Voice Mail System (GMS)
VMS	Voice Management System
VMSP	Virtual Machine / System Product (IBM, VM), "VM/SP" 
VMT	Virtual Method Table
VMTP	Versatile Message Transaction Protocol (RFC 1045)
VMTSS	Virtual Machine Time-Sharing System (IBM)
VMU	Visual Memory Unit (Sega, Dreamcast)
VNA	Virtual Network Architecture (ATM)
VNA	Virtual Network Architecture (Ungermann-Bass)
VNC	Virtual Network Client
VNC	Virtual Network Computer
VNC	Virtual Network Computing (AT&T, Linux)
VNCA	VTAM Node Control Application (IBM, VTAM)
VNF	Virtual Network Feature
VNL	Via Net Loss plan
VNLF	Via Net Loss Factor
VNNI	Vector Neural Network Instructions (AVX, CPU)
VNSM	VINES Network and Systems Management (Banyan, VINES)
VO	Virtual Organization (grid)
VOB	Video OBject [format] (DVD, video)
VOBS	Video OBject Set (VOB, DVD, video)
VOBU	Video OBject Units (ILVU, DVD, video)
VOD	Video On Demand
VOFR	Voice Over Frame Relay
VOI	Verband Optischer Informationssysteme (org.)
VOICE	Virtual OS/2 International Consumer Education (OS/2, user group, org.)
VOIP	Voice Over IP (IP, Internet, CTI), "VoIP"
VOL	Voice-Over-IP (IP, Internet)
VOLTE	Voice over LTE (LTE), "VoLTE"
VON	Voice On the Net [coalition] (USA, Internet)
VOODOO	Versions Of Outdated Documents Organized Orthogonally (Mac)
VOP	Voice Over Packet [processor] (Improv, IC), "VoP"
VORTEX	Varian Omnitasking Real Time EXecutive (???) (OS, Varian)
VOS	Virtual Operating System (OS, Stratus)
VOS	Virtual machine Operating System (OS, MTS)
VOWIP	Voice Over Wireless Internet Protocol (LAN, IP), "VoWIP"
VOWLAN	Voice Over WLAN (WLAN, LAN, IEEE 80211), "VoWLAN"
VP	Virtual Path (ATM)
VP	Virtual Processor (Amiga, AMIGADE)
VPA	VAX Performance Advisor (DEC, VMS, VAX)
VPC	Virtual Path Connection (ATM, VP)
VPC	Virtual Private Cloud
VPCC	Virtual PC Center (NEC, PC, TC)
VPCD	Videotex Presentation Control Element (BTX, VPDE)
VPCI	Virtual Path Connection Identifier (VP, ATM)
VPD	Virtual Product Development (CAD)
VPD	Vital Product Data
VPDE	Videotex Presentation Data Element (BTX)
VPDN	Virtual Private Data Network
VPE	Video Port Extensions (video)
VPFN	Virtual Page Frame Number (Linux, PFN)
VPI	Virtual Path Identifier (ATM, VP)
VPI	Virtual Private Internet (TradeWave)
VPICD	Virtual Programmable Interrupt Controller Device (PIC), "VpicD"
VPL	Virtual Path Link (UNI, ATM)
VPL	Visual Programming Languages
VPL	Voxel Public License
VPMI	Virtual Protected Mode Interface
VPN	Virtual Private Network
VPP	Value Purchase Plan (Adobe)
VPRT	Verband Privater Rundfunk und Telekommunikation Org., Germany
VPSD	VIA Platform Solutions Devision
VPSD	VIA Platform Solutions Division
VPT	Virtual Path Terminator (UNI, ATM)
VPU	Video Processing Unit
VPU	Visual Processing Unit (IC, SIMD, 3Dlabs)
VPUG	Ventura Publishing User Group (org., DTP, user group)
VPUML	Visual Paradigm for UML (UML, Eclipse), "VP-UML"
VQC	Vibrant Color Quality (Matrox)
VQEG	Video Quality Experts Group (video)
VQM	Visual Quality Metric (video)
VR	Virtual Reality
VR	Virtual Route (SNA, PSDN)
VR	Virtuelle Realitaet
VRAI	Virtual Reality Annual International [symposium] (IEEE, conference)
VRAM	VEIL Encoding Rights Assertion Mark (VEIL), "V-RAM"
VRAM	Volatile Random Access Memory (RAM, IC)
VRC	Vertical Redundancy Check
VRD	Virtual Retinal Display (VR)
VRG	Vertical Replacement Gate (IC, MOSFET)
VRI	[Nederlandse] Vereniging van Registerinformatic (org. Netherlands)
VRM	Vector Room Model
VRM	Virtual Resource Manager
VRM	Voltage Regulation Module (IC)
VRM	Voltage Regulator Modul (Iwill)
VRML	Virtual Reality Modeling Language (VR, ISO/IEC 14772, W3C)
VROC	Virtual-RAID-On-CPU (RAID, CPU, ASUS)
VROOMM	Virtual Realtime Object Oriented Memory Manager (OOP)
VRR	Variable Refresh Rate (HDMI)
VRRP	Virtual Router Redundancy Protocol (RFC 2338/3768)
VRS	Voice Response System
VRT	Vulnerability Research Team (Sourcefire)
VRTX	Versatile Real Time eXecutive (OS)
VS	VINES Security (Banyan, VINES)
VS1	Virtual System - 1 (IBM, OS, OS/VS-1), "VS-1"
VSA	Virtual Server Architecture
VSA	Visual Studio for Applications (MS)
VSA	Voodoo Scalable Architecture (3dfx)
VSAM	Virtual Sequential Access Method (SAM)
VSAM	Virtual Storage Access Method
VSAN	Virtual Storage Area Network (SAN, VMware)
VSAT	Very Small Aperture Terminal
VSC	VMware [GSX] Server Console (VMware)
VSCE	Videotex Service Control Element (BTX, VPDE)
VSD	Vendor Specific Driver
VSE	Virtual Storage Extended (IBM)
VSEA	Visual Studio Enterprise Architect [edition] (MS, XML)
VSED	Visual Studio Enterprise Developer [edition] (MS, XML)
VSEESA	Virtual Storage Extended/Enterprise Systems Architecture, "VSE/ESA" 
VSESP	Virtual Storage Extended/System Product (IBM), "VSE/SP"
VSGA	Virtual Shared Graphics Acceleration (VMware, vDGA), "vSGA"
VSI	Verband der SoftwareIndustrie deutschlands [e.v.] (org.)
VSI	Virtual Socket Interface alliance (org., ASIC, RL)
VSM	VideoSwitch Multiplexer
VSM	Virtual Storage Management
VSN	Volume Serial Number (BS2000)
VSO	Variable Speed Operation (VXA, Streamer)
VSP	Virtual Single Processor
VSR	Virtual Super Resolution (AMD)
VSR	Voice Storage and Retrieval
VSS	Visual Source Safe (VB, MS)
VSS	Voice Storage System
VSS	Volume Shadow copy Service (MS, Windows)
VST	VermittlungsSTelle (DTAG), "VSt"
VST	Virtual Studio Technology (Steinberg, audio)
VSTF	Volunteer Spam Task Force (Wikia, CVN)
VSTI	Virtual Studio Technology Instrument (VST), "VSTi"
VSTO	Visual Studio TOols for the microsoft office system (MS)
VSTS	Visual Studio Team Services (MS, TFS)
VSTS	Visual Studio Team System (MS)
VSU	Vertex/Scalability Unit (3Dlabs)
VSU	Video Service Unit
VT	Vanderpool Technology (Intel, Pentium, CPU)
VT	Virtual Terminal (DEC)
VT100	Virtual Terminal 100 (DEC), "VT-100"
VTAM	Virtual Telecommunications Access Method (IBM, SNA)
VTAME	Virtual Telecommunications Access Method Entry (VTAM)
VTD	Virtual Tape Device
VTI	Virtual Terminal Interface
VTK	Visualization ToolKit
VTKE	Verbund der TeleKommunikations-Endgeraetehersteller (org.)
VTL	Velocity Template Language (Apache, Java)
VTL	Virtual Tape Library
VTM	Verband der Telekommunikationsnetz- und Mehrwertdiensteanbieter (org.)
VTOC	Volume Table of Contents
VTOS	Virtual Technology Operating System (OS, Tandy, TRS-80)
VTP	Virtual Terminal Protocol
VTS	Video Teleconferencing System
VTS	Virtual Terminal Service (OSI)
VTSAPI	Voucher Trading System Application Programming Interface (API, RFC 4154), "VTS-API"
VU	Virtual User
VUD	Verband der Unterhaltungssoftwareindustrie Deutschlands (org.)
VUDA	VESA Unified Graphics Architecture (VESA)
VUE	Visual User Environment (HP)
VUI	Virtual User Interface (AMS, UI)
VUMA	VESA Unified Memory Architecture (VESA)
VUMASBE	VESA Unified Memory Architecture - System BIOS Extension (VESA), "VUMA-SBE"
VUP	VAX Units of Performance (VAX, DEC), "VUPs" 
VUP	Version UPgrade (MS)
VV	Virtuelle Verbindung
VVC	Versatile Video Codec (MPEG)
VVIDD	VESA Video Interface for Digital Displays (VESA, LCD)
VXAO	VoXel Ambient Occlusion (Nvidia)
W/	with
W/E	whatever
W/O	without
W2K	Windows 2000 (Windows, MS)
W3C	World Wide Web Consortium (WWW, org.)
W8	wait
WABI	Windows Application Binary Interface (MS, Windows)
WAFL	Write Anywhere File Layout (Netapp)
WAFS	Wide Area File Services
WAFWOT	what a foolish waste of time
WAG	Wild-Assed Guess (slang, Cygwin)
WAG	wild-ass guess
WAI	Web Accessibility Initiative (WWW, W3C, WAI)
WAI	Web Application Interface (WWW, Netscape)
WAIK	Windows Automated Installation Kit (MS, Windows, Vista)
WAIS	Wide Area Information Service (Internet)
WAITS	Westcoast Alternative to ITS
WAM	Warren Abstract Machine (PROLOG)
WAM	Web Application Manager (MS, Windows)
WAM	Wikia Activity Monitor
WAM	Windows Animation Manager (MS, Windows)
WAMIS	Wireless, Adaptive and Mobile Information Systems (ESTO)
WAMP	Windows, Apache, MySQL, PHP (Windows, Apache, PHP, DB, SQL)
WAMPP	Windows, Apache, MySQL, PHP and PERL (Windows, Apache, DB, SQL, PHP, PERL)
WAN	Wide Area Network
WAND	Wide Area Network Distribution (WAN)
WAP	Wireless Application Protocol (mobile-systems, WLAN)
WAP	Wissenschaftliche ArbeitsPlatzrechner
WAPP	Windows, Apache, PostgreSQL, PHP (Windows, Apache, PHP, DB, SQL)
WAR	Web Application aRchive (Java)
WAR	Write-After-Read (WAW, RAW)
WARP	Windows Advanced Rasterization Platform (MS, Windows)
WAS	Websphere Application Server (IBM, WBISF)
WASC	Web Application Security Consortium (org., WWW)
WASN	Wide Area Sensor Network
WASP	Web stAndardS Project (WWW, W3C)
WAT	West Africa Time [-0100] (TZ)
WATS	Wide Area Telephone Service
WAW	Write-After-Write (WAR, RAW)
WB	WorkBench (Amiga, Commodore)
WB	welcome back
WBC	Web Based Collaboration (WWW)
WBC	Wide Band Channel (FDDI)
WBEM	Web Based Enterprise Management [protocol] (DMTF, CIM, XML, HTTP, BMC, Cisco, Compaq, Intel, MS)
WBF	Windows Biometric Framework (MS, Windows)
WBI	Web Browser Intelligence (WWW, IBM)
WBISF	Websphere Business Integration Server Foundation (IBM, BPEL)
WBS	WissensBasierte Systeme (KI)
WC	WildCard multicast route entry (PIM, Multicast)
WC	Word Count (Unix)
WC	Write Cache (SCSI, HDD)
WCA	Wikimedia Chapters Association (org.)
WCAG	Web Content Accessibility Guidelines (WAI, W3C)
WCB	Write Combining Buffer (CPU)
WCCE	World Conference on Computers in Education (IFIP, conference)
WCDMA	Wideband Code Division Multiple Access (mobile-systems)
WCDMAFDD	Wide-band Code Division Multiple Access - Frequency Division Duplex (UMTS, mobile-systems), "WCDMA-FDD"
WCDMATDD	Wide-band Code Division Multiple Access - Time Division Duplex (UMTS, mobile-systems), "WCDMA-TDD"
WCF	Windows Communication Foundation (MS, Windows)
WCGA	World Computer Graphics Association (org.)
WCIT	World Conference on International Telecommunication (ITU)
WCMS	Web Content Management Software / System (CMS)
WCPGW	what could possibly go wrong
WCS	Windows Color System (MS, Windows)
WCS	Writable Control Store (VAX, DEC)
WCST	Webcam Child Sex Tourism
WCTS	Without Consulting The Source (slang, Cygwin)
WD	Western Digital [corporation] (manufacturer)
WD	Working Draft
WDG	Web Design Group (WWW, org.)
WDK	Word Developers Kit (MS)
WDL	Windows Driver Library (MS, Windows)
WDL	World Definition Language
WDM	Wavelength Division Multiplexing [protocol]
WDM	Windows / Win32 Driver Model (MS, Windows)
WDMCSA	Windows Driver Model Connection and Streaming Architecture (MS, Windows, WDM)
WDP	WatchDog Process
WDRP	Whois Data Reminder Policy (ICANN)
WDS	WatchDog Server
WDS	Windows Deployment Service (MS, Windows)
WDS	Wireless Distribution System (WLAN)
WDS	Wireless Domain Service (Cisco, WLAN)
WDT	Watch Dog Timer
WDT	Western [European] Daylight Time [+0100] (TZ, WET)
WDYMBT	what do you mean by that
WEBDAV	Web Distributed Authoring and Versioning (WWW, HTTP, RFC 2518), "webDAV"
WEBRC	Wave and Equation Based Rate Control
WEBRTC	WEB Real Time Communication (WWW, W3C), "WebRTC"
WECA	Wireless Ethernet Compatibility Alliance (org., WLAN, LAN)
WEEB	Western Europe EDIFACT Board (org., EDIFACT), "WE/EB"
WEEE	Waste from Electrical and Electronic Equipment (Europe)
WEFT	Web Embedding Font Tool (MS, WWW)
WELC	working effectively with legacy code
WELL	Whole Earth 'Lectronic Net (network)
WEP	Wired Equivalent Privacy (WLAN)
WESA	World ESports Association (org.)
WESTNET	WESTern regional NETwork (network, USA), "Westnet"
WET	Western European Time [+0000] (TZ, WDT)
WF	[Windows] Workflow Foundation (MS, Windows)
WFA	WiFi Alliance (org., WiFi)
WFC	Wait for Caller (BBS)
WFC	Windows Foundation Classes (MS, Java, API)
WFH	working from home
WFM	Wired For Management (Intel, IBM, BIOS), "WfM"
WFM	Works For Me (slang, Usenet, IRC)
WFM	works for me
WFMC	WorkFlow Management Coalition (org.), "WfMC"
WFP	Windows Filtering Platform (MS, Windows)
WFQ	Weighted Fair Queueing (VoIP)
WFS	Web Feature Service (OGC)
WFW	Windows For Workgroups (MS), "WfW" 
WG	Working Group (SC, ISO, IEC, ETSI)
WGA	Windows Genuine Advantage [program] (MS, Windows)
WHAT	Web Hypertext Applications Technology [working group] (WWW, org.)
WHATWG	Web Hypertext Application Technology Working Group (WWW, org.)
WHCA	White House Communications Agency (DISA)
WHDI	Wireless Home Digital Interface (org.)
WHEA	Windows Hardware Error  Architecture (MS, Windows)
WHIIG	Windows Hardware Instrumentation Implementation Guidelines (MS, Windows)
WHOLIS	World Health Organization Library Information System (org., UNO)
WHOSIS	World Health Organization Statistical Information System (org., UNO)
WHQL	Windows Hardware Quality Lab (MS, Windows, PC97)
WHSXGA	Wide Hex Super XGA [6400x4096] (XGA)
WHUXGA	Wide Hex Ultra XGA [7680x4800] (XGA)
WHXGA	Wide Hex XGA [5120x3200] (XGA)
WHYLINE	Workspace for Helping You Link Instructions to Numbers and Events (EuropeSES)
WIA	Windows Image Acquisition (MS, Windows, API, DDI)
WIA	Windows Imaging Architecture (MS, Windows, Vista)
WIBNI	wouldn't it be nice if
WIC	Windows Imaging Component (MS, Windows)
WICG	Web platform Incubator Community Group (org., W3C)
WIDD	Web InformationsDienst Deutschland (WWW, Neuss, Germany)
WIDI	WIreless DIsplay (Intel), "WiDi"
WIF	Web Interface Facility (WWW, MVS, OS/390)
WIFI	WIreless FIdelity [alliance] (WLAN), "Wi-Fi"
WIFI	WIreless FIdelity [certificate] (WECA, WLAN), "WiFi"
WIIS	Windows Internet Information Server (MS, Windows, Internet)
WIKINGER	WIKI Next Generation Enhancement Repository
WIM	Wireless Identity Module (WAP, cryptography)
WIMA	[windows] Webserver - IIS - MSDE - ASP.Net (MS, IIS, MSDE, ASP)
WIMAN	WIreless Metropolitan Area Network (MAN, W-LAN)
WIMAX	Worldwide Interoperability for Microwave ACCess (IEEE 802.16)
WIMP	Window, Icon, Menu, Pointing device
WIN	WIssenschaftsNetz (network, DFN)
WINHEC	WINdows Hardware Engineering Conference (MS, Windows, conference), "WinHEC"
WINLAB	Wireless Information Network LABoratory (org., STC, USA)
WINNIE	Water Initiated Numerical Number Integrating Engine
WINRE	WINdows Recovery  Environment (MS, Windows), "Win RE"
WINS	Windows Internet Naming Service (MS, Windows NT)
WIP	Work In Progress (slang)
WIP	work in progress
WIPO	World Intellectual Property Organization (org.)
WIPS	Web Interactions Per Second (TPC)
WIPSB	Web Interactions Per Second Browsing (TPC, WIPS), "WIPSb"
WIPSO	Web Interactions Per Second Ordering (TPC, WIPS), "WIPSo"
WISA	Wireless Speaker and Audio Association (org.)
WISC	Wisconsin Integrally Synchronized Computer
WISE	World-wide Information System for r&d Efforts (WWW, IGD)
WISH	Wireless Intelligent Stream Handling (W-LAN)
WISIA	Wissenschaftliches InformationsSystem fuer den Internationalen Artenschutz (WWW)
WISPR	Wireless ??? ISP Roaming (WLAN, ISP, org., WECA), "WISPr"
WITCH	Wolverhampton Instrument for Teaching Computation from Harwell
WITT	Workstation Interactive Test Tool (IBM)
WIX	Windows Installer XML (MS, Windows, XML), "WiX"
WIZOP	WIzard sysOP, "WizOp" 
WKS	Well Known Services (DNS, Internet)
WLAN	Wireless Local Area Network (LAN, WLAN, IEEE)
WLANA	Wireless Local Area Network Alliance (org., WLAN, LAN)
WLBS	Windows Load Balancing Service (MS, Windows NT)
WLC	Workload License Charge (IBM, PSLC)
WLCG	Worldwide LHC Computing Grid (CERN)
WLCSP	Wafer-Level ChipScale Packaging
WLIF	Wireless LAN Interoperability Forum (org., WLAN, LAN)
WLL	Wireless Local Loop
WLM	WorkLoad Manager (IBM, HP-UX)
WLO	Windows Libraries for OS/2 (MS, IBM, API, OS/2, Windows)
WLO	Windows Library Objects
WLOG	Without Loss Of Generality
WLP	Wafer Level Packaging
WLS	White Line Skip (Fax)
WLSEC	Wireless LAN SECurity [framework], WLSec
WMA	Windows Media Audio [CODEC] (MS, Windows, audio, CODEC)
WMA	Wireless Messaging API (API, Java, J2ME, JSR-120)
WMAN	Wireless Metropolitan Area Network (WLAN, MAN)
WMC	Windows Media Connect (MS, Windows, DRM)
WMCDC	Wireless Mobile Communication Device Class (USB, MS, Windows, CDC)
WMF	WikiMedia Foundation (org.)
WMI	Web Management Interface
WMI	Windows Management Instrumentation / Interface (MS, Windows, WMI, CIM)
WML	Wireless Markup Language (mobile-systems, WAP, XML)
WMM	WiFi MultiMedia (WiFi, WLAN)
WMNC	watch me not care
WMP	Windows Media Player (Windows)
WMRM	Windows Media Rights Manager (MS, Windows)
WMS	Warehouse Management System (DB)
WMS	Web Mapping Service (OGC)
WMS	Workflow Management Systems
WMT	Web Marketing Tools [magazine] (Italy, WWW)
WMT	Web Marketing Tools [newsletter] (WWW)
WMV	Windows Media Video [CODEC] (MS, Windows, video, CODEC)
WMVHD	Windows Media Video - High Definition (WMV, Windows), "WMV-HD"
WNIM	Wide area Network Interface Module
WNM	Wireless Network Management (CA, Unicenter)
WNPP	Work-Needing and Prospective Packages (Linux, Debian)
WOF	Windows Overlay Filter (MS, Windows)
WOF	WithOut Fan (CPU)
WOFF	Web Open Font Format (WWW)
WOL	Wake On LAN (LAN, APM, BIOS)
WOMBAT	waste of money, brain, and time
WON	World-O-Networking (BeOS)
WOPC	Walking Optimal Power Calibration (BenQ, Philips, DVD)
WORDIA	WORD Internet Assistant (MS)
WORM	Write Once Read Many (CD)
WOSA	Windows Open System Architecture (MS)
WOSAXCEM	WOSA eXtensions for Control, Engineering and Manufacturing (WOSA, MS)
WOSAXFS	WOSA eXtensions for Financial Services (WOSA, MS), "WOSA X FS" 
WOSAXRT	WOSA eXtensions for Real-Time market data (WOSA, MS)
WOSC	World Organization of Systems and Cybernetics (org., France)
WOT	Web Of Things (W3C), "WoT"
WOW	Windows On Windows
WOW	World Of Warcraft
WP	Word Perfect
WPA	Wi-Fi Protected Access (WEP, WLAN)
WPAD	Web Proxy Auto Discovery (MS, Windows)
WPAN	Wireless Personal Area Network
WPBT	Windows Platform Binary Table (MS, Windows, BIOS, UEFI)
WPE	Windows Protected Environment
WPF	Windows Presentation Foundation (MS, Windows, XAML)
WPFE	Windows Presentation Foundation / Everywhere (MS, Windows), "WPF/E"
WPS	Wi-fi Protected Setup (W-LAN, Wi-Fi)
WPS	Windows Printing System (MS, Windows)
WPS	Wireless Portal Suite (WLAN)
WPS	Word Processing Software
WPS	WorkPlace Shell (OS/2, IBM, Shell)
WQE	Work Queue Element (Infiniband, CA, QP)
WQHD	Wide Quad HD [2560x1440] (HD)
WQL	WMI Query Language (MS, Windows, WMI)
WQSXGA	Wide Quad Super XGA [3200x2048] (XGA)
WQUXGA	Wide Quad Ultra XGA [3840x2400] (XGA, QWUXGA)
WQVGA	Wide Quarter VGA [432x240] (QVGA, VGA)
WQXGA	Wide Quad XGA [2560x1600] (XGA)
WRAM	Window Random Access Memory (RAM, IC, Samsung, Matrox)
WRB	Web Request Broker (Oracle, WWW)
WRSF	Web Service Resource Language (grid)
WRT	Whitewater Resource Toolkit (Windows, TPW)
WRT	With Respect To (slang, Usenet, IRC)
WRT	with respect to
WS	Web Server (Corel)
WS	[Red Hat Enterprise Linux] WorkStation (RedHat, Linux, RHEL)
WS4B	Web Services for Browser (WWW)
WSA	Wafer Supply Agreement (AMD)
WSAD	Websphere Studio Application Developper (IBM, Java)
WSCM	Web Services Component Model (OASIS, WWW)
WSDD	Web Service Deployment Descriptor (WWW, XML)
WSDK	Websphere Software Development Kit (IBM, Java)
WSDL	Web Services Description Language (WWW, XML)
WSDP	[Java] Web Services Developer Pack (WWW, XML, Java, Sun)
WSE	Web Service Enhancements (MS, WWW)
WSEB	Warp Server E-Business (IBM, OS/2), "WSeb"
WSF	Work Station Feature (IBM)
WSF	Work Station Function (IN)
WSFL	Web Services Flow Language (WWW, IBM)
WSH	Windows Scripting Host (MS, Windows, COM, WSH)
WSI	Web Services Interoperability (org., OASIS, WWW), "WS-I"
WSIA	Web Services for Interactive Applications (OASIS, WWW)
WSIF	Web Services Invocation Framework
WSIL	Web Services Inspection Language (IBM, XML)
WSIS	World Summit on the Information Society
WSL	Windows Subsystem for Linux (MS, Windows, Linux)
WSM	Wireless Site Management
WSP	White SPace [character] (ABNF, RFC 2234)
WSP	Wireless Session Protocol (WAP, mobile-systems)
WSP	Workstation Security Package
WSRM	Windows System Resource Manager (MS, Windows)
WSRP	Web Services for Remote Portals (WSIA, WSXL, OASIS)
WSS	Web Services Security (WWW)
WSS	Windows Sharepoint Services (MS, Windows)
WSS	Windows Sound System (Windows, audio)
WSSD	Windows Server Software-Defined (MS, Windows)
WSTK	Web Service ToolKit (IBM, WWW)
WSTKMD	Web Services Tool Kit for Mobile Devices (IBM, Java)
WSUS	Windows Server Update Services (MS, Windows)
WSVGA	Wide Super Video Graphics Adapter / Array (VGA)
WSVT	Web Service Validation Tools (WTP)
WSXGA	Wide Super eXtended Graphics Adapter / Array (XGA), "WSXGA+"
WSXL	Web Services Experience Language (WWW)
WT	Working Text (DSL-Forum, TR)
WTB	Want To Buy (MMORPG, slang)
WTB	{waiting,want,willing} to buy
WTC	Windows Terminal Controller
WTF	What / Where / Who / Why The Fuck (telecommunication, Usenet, IRC)
WTF	where's the food
WTG	way to go
WTH	What / Where / Who / Why The Hell (telecommunication, Usenet, IRC)
WTH	{what,when,where,who,why} the hell
WTLS	Wireless Transport Layer Security [protocol] (TLS, WAP)
WTP	Web Tool Platform (Eclipse, Java, WWW)
WTP	Wireless Transport Protocol (WAP, mobile-systems)
WTS	Want To Sell (MMORPG, slang)
WTS	Web Transaction Security (WWW)
WTS	Windows Terminal Server (MS, :NET)
WTS	{waiting,want,willing} to sell
WTT	Want To Trade (MMORPG, slang)
WTT	{waiting,want,willing} to trade
WTX	Workstation Technology eXtended [format]
WUXGA	Wide Ultra eXtended Graphics Adapter [1920x1200] (XGA)
WVGA	Wide Video Graphics Array  [800 x 480], [854 x 480], ...
WVNET	West Virginia Network for Educational Telecomputing (network, USA)
WVSO	WiederVerwendbare SoftwareObjekte
WWAN	Wireless Wide Area Network (WLAN, WAN, LTE)
WWCID	World Wide Cartridge IDentifier (IBM, Streamer, WORM)
WWDC	World Wide Developer Conference (Apple)
WWDM	Wide Wave Division Multiplex
WWIMS	Worldwide Warning Indicator Monitoring System (mil.)
WWJD	what would Jesus do?
WWMCCS	Worldwide Military Command and Control System (mil., predecessor, GCCS)
WWOLS	World Wide On-Line System (mil.)
WWW	World Wide Waiting (slang)
WWW	World Wide Web (Internet)
WXGA	Wide eXtended Graphics Adapter (XGA)
WYGIWYNTYH	What You Get Is What You Never Thought You Had (slang)
WYSBYGI	What You See Before You Get It (DTP)
WYSIWIS	What You See Is What I See
WYSIWYG	What You See Is What You Get (DTP)
X11	X window System version 11 (X-Windows)
XA	eXtended Architecture (IBM, VM, ESA, VM/ESA, XC)
XAA	Xfree86 Acceleration Architecture (X-Windows)
XACML	eXtensible Access Control Markup Language (OASIS, XML)
XACT	Xante's Accurate Calibration Technology (Xante), "X*ACT"
XADES	XML ADvanced Electronic Signature (XML, ETSI, cryptography), "XAdES"
XAG	XML Accessibility Guidelines (XML, W3C, WWW)
XAML	XML Application Markup Language (XML, MS, Windows)
XAPIA	X.400 API Association (org., X.400, API)
XAVC	eXtended Advanced Video Coding (Sony, video)
XBEL	XML Bookmark Exchange Language (XML, PSA)
XBL	eXtensible Binding Language (Mozilla)
XBMC	XBox Media Center [old term]
XBMSP	XBox Media Streaming Protocol (Xbox)
XBP	XBase Parts (Xbase/2, OS/2, DB)
XBRL	Extensible Business Reporting Language (XFRML, XML)
XC	eXtended Configuration (IBM, ESA, VM)
XCBF	XML Common Biometric Format (XML)
XCBL	XML Common Business Library (XML), "xCBL"
XCCI	X Common Client Interface (X-Windows), "X CCI" 
XCEM	eXtensions for Control, Engineering and Manufacturing (API, MS, Windows)
XCHS	eXtended Cylinder Head Sectors (EIDE)
XCMOS	eXtended CMOS (IC, CMOS)
XCMS	X Color Management System (X-Windows), "Xcms" 
XCOFF	eXtended Common Object File Format (Unix)
XCRL	extensible Customer Relationships Language (OASIS, CIQ, CRML), "xCRL"
XCUTS	X Commands and Utilities Test Suite (X/Open)
XD	eXecute Disable (Intel)
XDM	X Display Manager (X-Windows)
XDMCP	X Display Manager Control Protocol (X-Windows)
XDP	eXpress Data Path (BPF, Linux)
XDR	eXternal Data Representation (ONC, RPCL, Sun, RFC 1832)
XDRRAM	eXtreme Data Rate Random Access Memory (Rambus, RAM), "XDR-RAM"
XDS	Xeros Data Systems (manufacturer, Xerox)
XDSL	x Digital Subscriber Line (ADSL, HDSL, SDSL, UDSL, VDSL), "xDSL"
XE	eXtreme Edition (Intel, Pentium)
XEP	XMPP Extension Protocols (XMPP)
XES	Xerox Engineering Systems (Xerox)
XFA	XML Forms Architecture (XML)
XFCB	Extended File Control Block
XFE	X Front End (X-Windows)
XFI	eXtreme FIdelity (audio, Creative), "X-Fi"
XFN	X/open Federated Naming (X/Open)
XFR	eXtended Frequency Range (CPU, AMD)
XFRML	Extensible Financial Reporting Markup Language (XBRL)
XFS	eXtended File System (SGI, Unix, Windows)
XG	eXtended General MIDI (Yamaha, MIDI)
XGA	eXtended Graphics Adapter  [1024x768] (IBM, PS/2)
XGMML	eXtensible Graph Markup and Modeling Language
XHTML	eXtended HyperText Markup Language (HTML, WWW, XML)
XID	[SNA] eXchange IDentifier (SNA)
XIE	X Image Extension (X-Windows)
XINU	XINU Is Not Unix (OS)
XIOS	eXtended Input/Output System (Novell, Netware)
XIP	eXecute In Place
XKMS	XML Key Management Specification (XML, W3C)
XLFD	X Logical Font Description (X-Windows)
XLIFF	XML Localisation Interchange File Format (XML)
XLIFF	XML Localization Interchange File Format (XML, OASIS)
XLINK	XML LINKing language (XML)
XLINK	eXtended Lokales InformatikNetz Karlsruhe (telecommunication, network, ISP)
XMAPI	eXtended Messaging Application Program Interface (API)
XMF	eXtensible Music Format (MMA, MIDI)
XMI	XML Metadata Interchange [format] (XML, OMG)
XMI	eXtended Memory Interconnect (DEC)
XML	eXtensible Markup Language (WWW, XML, W3C)
XMLSS	XML Spreadsheet Scheme (XML, MS, Excel)
XMM	eXtended Memory Manager (DOS, LIM)
XMMS	X MultiMedia System (X-Windows)
XMP	X/open Management Protocol (X/Open, X-Windows)
XMP	eXtensible Metadata Format
XMPP	eXtensible Messaging and Presence Protocol (XMPP)
XMS	eXtended Memory Specification (DOS, LIM)
XMS	eXtended Multiprocessor operating System (OS)
XN	eXecution Node
XNS	Xerox Network Services / Systems / Standard (Xerox, XNS)
XNSCP	[PPP] XNS IDP Control Protocol (RFC 1764, Xerox, XNS, PPP, XNS, IDP)
XNSIDP	Xerox Network Services - Internet Datagram Protocol (Xerox, Internet, XNS), "XNS-IDP" 
XNSITP	Xerox Network Services/Internet Transport Protocol (Xerox, XNS), "XNS/ITP"
XNTP	eXperimental Network Time Protocol (NTP)
XOFF	eXchange OFF (MODEM)
XOL	XML based Ontology exchange Language (XML, WWW)
XON	eXchange ON (MODEM)
XOT	X.25 Over TCP (Cisco, X.25, TCP, RFC 1613)
XP	[Windows] eXPerience (MS, Windows, OS)
XP	eXtreme Programming
XPC	X Performance Characterization [group] (GPC, X-Windows)
XPE	XchangePoint Europe (ISP)
XPFE	cross Platform Front End (Mozilla)
XPG	X/open Portability Guide (X/Open, X-Windows)
XPGR3	X/open Portability Guide Release 3 (X/Open, X-Windows)
XPP	X Printing Panel (X-Windows, CUPS, printing)
XPP	eXtrem Processor Platform (MPP)
XPS	XML Paper Specification (MS, Windows, Vista)
XPS	eXPert System (AI, XPS)
XPS	eXtended Parallel Server (DB, Informix)
XPSB	X - Protocol Stream Benchmark (XPC, X-Windows)
XQL	XML Query language (XML)
XRIP	eXtended ??? Routing Information Protocol (Novell, Netware)
XRL	X-Ray Lithography
XRML	eXtensible Rights Markup Language (RMS, MS, NGSCB), "XrML"
XRN	eXpandable Resilient Networking (3Com, LAN)
XRT	eXtensions for Real-Time market data (API, MS, Windows)
XSD	XML Schema Definition [language] (XML)
XSD	eXtra Space Design [monitor] (Philips)
XSDT	eXtended System Description Table (ACPI)
XSHM	Cross-Site History Manipulation (WWW)
XSHM	X Shared Memory (X-Windows)
XSL	eXtensible Stylesheet Language (XML, XSL)
XSLFO	XML Stylesheet Language - Formatting Objects (XML, XSL), "XSL-FO"
XSLT	eXtensible Stylesheet Language Transformations (XSL, XML)
XSMD	eXtended Storage Module Driver interface
XSS	Cross-Site Scripting (WWW)
XT	eXtended Technology (IBM, PC)
XT	eXtreme Tailoring (XP)
XTF	eXtensible Tag Framework (Mozilla, XML)
XTI	X/open Transport Interface (X/Open, X-Windows)
XTM	XML Topic Map (XML, KM, XTM)
XTP	eXpress Transport Protocol
XTP	eXtreme Transactional Processing (MS)
XUI	X-windows User Interface (UI, X-Windows)
XUIDL	X-Unique-ID-Listing. (UIDL, POP3), "X-UIDL"
XUL	XML-based User interface Language (XML, Netscape, Mozilla, AOL)
XUMA	eXpertensystem UMweltgefaehrlichkeit von Altlasten (XPS)
XVBA	X-Video Bitstream Acceleration (AMD, ATI), "XvBA"
XVT	eXecutive Vector Table (BS2000)
Y2K	[Year 2000] [problem] (slang)
YAAS	Yet Another Acronym Server (WWW)
YABA	Yet Another Bloody Acronym (slang)
YACC	Yet Another Compiler Compiler (Unix)
YACY	Yet Another CYberspace (P2P), "YaCy"
YADE	Yet Another DSSSL Engine (DSSSL)
YAFFS	Yet Another Flash File System (FS, Flash)
YAFIYGI	You asked for it, you got it (Usenet, IRC, slang)
YAGNI	Youn Ain't Gonna Need It (slang, Usenet, IRC)
YAGNI	you ain't gonna need it
YAHOO	Yet Another Hierarchically Officious Oracle (WWW)
YALIMO	you are lame, in my opinion
YAML	Yet Another Multicolumn Layout (HTML, XHTML, CSS)
YAOTM	yet another off-topic message
YAPC	Yet Another PERL Conference (PERL)
YARN	Yet Another Resource Negotiator (Hadoop)
YASOS	Yet Another Scheme Object System
YAST	Yet Another Setup Tool (Linux, SUSE), "YaST"
YAUN	Yet Another Unix Nerd
YAY	Yet Another YACC (YACC, Bull)
YCPS	Yale Center for Parallel Supercomputing (org., USA, HPC)
YCTAT	you can't troll a troll
YGM	you got mail
YGWYPF	You Get What You Pay For (slang, Usenet, IRC)
YHBT	you have been trolled
YHL	you have lost
YHTWFWYWTS	You Have To Wait For What You Want To See (slang, WYSIWYG)
YKWIM	you know what I mean
YLOD	Yellow Light Of Death (Sony, Playstation)
YMMD	You Made My Day (slang, Usenet, IRC)
YMMV	Your Mileage May Vary (slang)
YMMV	your mileage may vary
YOLO	you only live once
YOU	YAST Online Update (YAST, Linux, SuSE)
YOYO	You're On Your Own (slang, Usenet, IRC)
YSM	Yourdon Structured Method
YST	Yukon Standard Time [-0900] (TZ)
YW	you're welcome
YWSYLS	you win some, you lose some
ZAAP	Z[series] Application Assist Processor (IBM, zSeries), "zAAP"
ZAK	Zero Administration Kit (ZAW, MS, Windows NT)
ZAP	ZFS Attribute Processor (ZFS)
ZAPP	Zero Assignment Parallel Processor
ZAW	Zero Administration initiative for Windows (MS, Windows NT)
ZBR	Zone Bit Recording (BIT)
ZC	Zone Co-ordinator (FidoNet)
ZCAV	Zone Constant Angular Velocity
ZCLV	Zoned Constant Linear Velocity (DVD, DVD-RAM)
ZCR	Zero Channel RAID (RAID)
ZCV	Zortech Class Viewer (Zortech)
ZDPMS	Zero Delay Power Monitoring System (Enermax)
ZDS	Zenith Data Systems (manufacturer)
ZDVA	Zentrale DatenVerarbeitungsAnlage [des bundes]
ZE	Zentraleinheit (CPU)
ZEAS	ZEntrales AbsatzanalyseSystem (MBAG)
ZEBES	Zentrales teile-BEstandsSteuerungssystem (MBAG)
ZEDAT	ZentralEinrichtung DATenverarbeitung (FUB, Org)
ZEDIS	ZEntrales teile-DispositionsSystem (MBAG)
ZEO	ZOPE Enterprise Objects (ZOPE)
ZEPRAS	ZEntrales PReisabwicklungs- und AnalyseSystem (MBAG)
ZESOD	ZEntrale teileSOrtimentDatei (MBAG)
ZEVIS	ZEntrales VerkehrsInformationsSystem (Kraftfahrzeugbundesamt)
ZFOD	Zero-Filled On Demand
ZFS	Zettabyte File System [old term] (Sun, Solaris)
ZGDV	Zentrum fuer Grafische DatenVerabeitung (org., Darmstadt, Germany)
ZIAM	Zentrum fuer Industrielle Anwendungen Massiver parallelitaet [gmbh] (org.)
ZIB	[konrad-zuse] Zentrum fuer Informationstechnik Berlin (org.)
ZIF	Zero Insertion Force [socket] (IC)
ZIIP	[system] Z9 Integrated Information Processor (IBM, zSeries), "zIIP"
ZIL	ZFS Intent Log (ZFS)
ZIL	Zork Implementation Language (Infocom)
ZILOG	Z (the last word of) Integrated LOGic (manufacturer), "ZiLOG"
ZIP	Zigzag Inline Package (VRAM)
ZIP	Zone Information Protocol (AppleTalk)
ZIP	zoning improvement plan
ZIS	ZollInformationsSystem Germany
ZISC	Zero Instruction Set Computer (CPU)
ZIT	interdisziplinaeres forschungsZentrum fuer Informatik und Technik (org., Uni Paderborn, Germany)
ZKA	Zentraler Kreditausschuss banking, Org., Germany
ZKDSG	ZugangsKontrollDiensteSchutzGesetz Germany, telecommunication
ZKI	Zentralinstitut fuer Kybernetik und Informationsprozesse (GDR)
ZMD	Zenworks [Linux] Management DAEMON (Novell, Linux, DEAMON)
ZMH	Zone Mail Hour (FidoNet)
ZMI	ZOPE Management Interface (ZOPE)
ZMT	Zentrum fuer Multimediale Telekommunikation (BERKOM)
ZOC	Zap-O-Comm (OS/2, telecommunication)
ZODB	ZOPE DataBase (DB, OO, ZOPE)
ZOL	ZFS On Linux (Linux, ZFS)
ZOPE	Z Object Publishing Environment (ZOPE)
ZOS	Z/Operating System (IBM, Java, OS), "z/OS"
ZPL	ZFS POSIX Layer (ZFS, POSIX)
ZPL	Zope Public License
ZPR	Zentrum fuer Paralleles Rechnen (org., Uni Koeln, Germany)
ZPR	Zero Power Resistance
ZPT	ZOPE Page Templates (ZOPE)
ZRE	Zero Rate Error
ZRTP	Zimmerman's Real-time Transport Protocol (TTP)
ZRZ	Zentrales RechenZentrum (org., TUB)
ZSI	Zentralstelle fuer Sicherheit in der Informationstechnik [old term] Org., Germany, BSI, Vorlaeufer
ZSK	Zone Signing Key (KSK)
ZSL	Zero Slot LAN (LAN)
ZV	Zoomed Video (video)
ZVM	Z/Virtual Machine (IBM, VM), "z/VM"
ZVOL	ZFS VOLume (ZFS)
ZWEI	ZWEI Was EINE Initially (EINE, LISP)
ZZF	Zentralamt zur Zulassung von Fernmeldeeinrichtungen (org., DTAG, predecessor, BZT)
ZZK	ZentralZeichengabeKanal (ISDN)
