| dfxml | Digital Forensics XML |
| dgb | Digitarch FlashCAD Drawing Database |
| dgdb | Data Guardian Database |
| dgf | DUNE Grid Format File |
| dgi | HDConvertToX Input |
| dgl | DigiGuide Language Data |
| dgnlib | Bentley MicroStation Design Library |
| dgo | Dell EqualLogic Diagnostic Log |
| dgp | Creator Generated Waveform |
| dgz | Dega GZipped Saved State Data |
| dhg | Direct Hit Graphics Engine Output |
| dhs | HyperSnap Captured Drawing |
| diag | Microsoft Windows Troubleshooting Pack Designer Data |
| dic | Microsoft Office Custom Dictionary |
| dict | DICT Data File |
| did | Verity Server Index Data File |
| dii | AD Summation iBlaze Data |
| dil | DesignComposer Presentation Input Script |
| dim | Direct Internet Message Encapsulation Data |
| dime | Direct Internet Message Encapsulation Data |
| dip | DVDINFOPro Data |
| dipx | DVDINFOPro Data |
| dis | MSC Patran Displacement Results |
| disp | Altair OptiStruct Displacement Data |
| dist | PLINK Genomic Hamming Distance Matrix |
| dit | Windows 2000 Active Directory Data Store |
| dita | DITA Document |
| ditamap | DITA Topic Map |
| ditaval | DITA Conditions Data |
| dix | Stonevoice Translator Custom Dictionary |
| dix | Apertium Monodix Dictionary Data |
| diy | My Drivers Backup Setup |
| djf | NTI Backup Now Drive Backup |
| djm | Dynojet Map Data |
| djp | DJPrint Data |
