elk: elk (linearized augmented-plane-wave (LAPW) software) elk: elk: An all-electron full-potential linearised augmented-plane wave elk: (LAPW) code with many advanced features. Written originally at elk: Karl-Franzens-Universitat Graz as a milestone of the EXCITING EU elk: Research and Training Network, the code is designed to be as simple elk: as possible so that new developments in the field of density elk: functional theory (DFT) can be added quickly and reliably. The code elk: is freely available under the GNU General Public License. elk: elk: