File formats

List of File Types Used by Doom/Doom II

 * .lmp - Doom exectuable demo recording format
 * .wad - Doom level resource file (contains textures, sprites, music, and level layout)

List of File Types Used/Created by Doom Editing Programs

 * .deh - DeHacked file which allows editing of hardcoded aspects of Doom
 * .bex - Enhanced DeHackEd-type file used by Boom and other source ports
 * .lev - File which can be loaded along with a PWAD and renames Doom levels
 * .mus - Music file format of Doom

Doom Utility File Types

 * .bat - Executable batch file that contains multiple DOS commands and can be used to present a menu and run specific programs or utilities