ddd:  Data Display Debugger
ddd: 
ddd: DDD is a graphical front-end for command-line debuggers such as GDB,
ddd: DBX, WDB, Ladebug, JDB, XDB, the Perl debugger, the bash debugger,or the
ddd: Python debugger. Besides ``usual'' front-end features such as viewing
ddd: source texts, DDD has become famous through its interactive graphical data
ddd: display, where data structures are displayed as graphs
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