| dep | HAHTsite Project Dependencies Data |
| deploy | ClickOnce Deployment Data |
| desg | Stuffit DropSegment Data |
| dess | Microsoft Device Emulator Saved State Data |
| det | Act! Email Message |
| deu | Adobe Acrobat Reader German Language Data |
| dev | Railway Operation Simulator Development Data |
| devx | E-Sword Devotional Data |
| dez | DataEase v4 Data File |
| df | Paradox Table Filter |
| df | Lightscape Parameter File |
| df10 | IRIG 106 Recording Directory Data |
| df7 | Omnis Studio v7 Database |
| dfa | SecuROM Manual Activation Request. |
| dfd | Oracle Documaker Data Field Definition Data |
| dfd | qs-STAT Q-DAS Description File |
| dfh | Cakewalk Sonar Drum Kit Data |
| dfi | TI bqEASY Data Flash Image |
| dfp | Data Flask Package |
| dfq | SmartWare Query Definition File |
| dfq | qs-STAT Q-DAS Shared Data File |
| dfr | DataFlex Registration Data |
| dfr | Avantes Avasoft v8 Intensity Calibration ASCII Data |
| dfr | SmartWare Report Definition File |
| dfs | BrainSuite Surface |
| dfs | SmartWare Sort Definition File |
| dfs2 | MIKE 11 Results Data |
| dft | EES Default Information |
| dft | SmartWare Transact Definition File |
| dfv | Microsoft Word Print Format Template |
