| dcf | Arbortext Editor Document Type Configuration Data |
| dcf | DynSite Configuration Data |
| dcf | HP 95LX Comm Program Settings Data |
| dcls | Catia V4 Settings |
| dcp | Adobe DNG Camera Profile |
| dcpr | Adobe DNG Camera Profile Recipe |
| dcst | Adobe InDesign Document Settings |
| def | Binary Editor Definition Data |
| defs | Linux Shadow Password Suite Configuration |
| deft | Juice Grinder Defaults |
| deny | TCP Wrapper Access List Data |
| depot | HP-UX Software Distributor Catalog Depot |
| desktop | Desktop Entry |
| dfrocfg | SUMO dfrouter Configuration |
| diagcfg | Windows Troubleshooting Pack Configuration |
| dirac | DIRAC Configuration Data |
| dkm | DynaComm Asynchronous Keyboard Mapping |
| dlf | FlashFXP Default Language Data |
| dmms | iMindQ Mind Map Style |
| dno | DriveTools SP DriveExecutive Parameters |
| docc | DragThing Color Settings |
| dok | DesktopOK Icons Layout |
| dolphinview | Dolphin Folder View Settings |
| dpf | DOpus v9 Preferences Data |
| dps | DOpus Exported Settings |
| dpst | DYNAMICS Presets Data |
| dr2 | Aurora Data Resource Definition |
| drpf | Dinkey Pro/FD DinkeyRemote Parameter Data |
| ds7 | Casio WK-3000 User DSP |
| dst | RAD Studio Desktop Settings |
| dsx | DAZ Studio Configuration |
| dtpc | LaserWriter Configuration Data |
| dtsconfig | SSIS Package Configuration |
| dtstyle | Darktable Style Data |
| duarcfg | SUMO duarouter Configuration |
