| dem | Vflo Digital Elevation Model Data |
| den | XMVB Density Data |
| deos | Driver Easy Offline Scan Data |
| dep | HAHTsite Project Dependencies Data |
| deploy | ClickOnce Deployment Data |
| der | Certificate File |
| des | Interscope BlackBox DES Data |
| des | Medlin Payroll Software Sales Code Information |
| des | Pro/DESKTOP CAD Data |
| des-se | Sony Ericsson Xperia X10 Description Data |
| description | Multilizer PDF Translator Description Data |
| desg | Stuffit DropSegment Data |
| desktop | DesktopX Windows Desktop Theme |
| dess | Microsoft Device Emulator Saved State Data |
| det | Act! Email Message |
| deu | Adobe Acrobat Reader German Language Data |
| deu | Unreal Engine German Language Data |
| dev | E-Sword Devotional Data |
| dev | Railway Operation Simulator Development Data |
| devhelp | KDevelop DevHelp Documentation |
| deviceids | iOS Device Identification Data |
| deviceinfo | iPhone Configuration Utility Device Info |
| devx | E-Sword Devotional Data |
| dez | DataEase v4 Data File |
| df | Corel Paradox Table Filter |
| df | erwin Progress Data Definition Text |
| df | Lightscape Parameter File |
| df | Paradox Table Filter |
| df10 | IRIG 106 Recording Directory Data |
| df3 | POV-Ray Density File |
| df7 | Omnis Studio v7 Database |
| dfa | Julius Compiled Grammar Data |
| dfa | SecuROM Manual Activation Request. |
| dfclass | Together ControlCenter Development Tool Class |
| dfcomponent | Together ControlCenter Development Tool Component |
