| dgp | Creator Generated Waveform |
| dgprint | DigiGuide Print Template |
| dgs | DevSoft 3D Screen Creator Scene |
| dgscheme | DigiGuide TV Scheme Data |
| dgscript | DigiGuide Script |
| dgst | OpenSSL Message Digest Data |
| dgtoolbar | DigiGuide Toolbar Data |
| dgz | Dega GZipped Saved State Data |
| dhcd | DHCD Computing Application Data |
| dhg | Direct Hit Graphics Engine Output |
| dhl | Deepnet HTTP Server Log |
| dhs | HyperSnap Captured Drawing |
| dht | GAUSS Engine Data Set Header |
| dhx | Datamine Studio Data |
| dhy | Adobe Bridge Data |
| diag | Microsoft Windows Troubleshooting Pack Designer Data |
| dialog | UltraEdit Dialog Data |
| dialog | Zoom Player Dialog Texts Data |
| dic | Microsoft Office Custom Dictionary |
| dicproof | Microsoft Word Dictionary Proofing Data |
| dict | DICT Data File |
| dict | Microsoft Virtual PC Dictionary Data |
| dict | Spellswell Dictionary |
| dict | Sunnysoft InterWrite Dictionary Data |
| dicx | Redatam Binary Dictionary Data |
| did | Verity Server Index Data File |
| dif | MAME CHD Diff Data |
| dif | OS/2 Warp Display Information |
| dii | AD Summation iBlaze Data |
| dii | TrialDirector Load Data |
