| 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 |
| dictionary | Mac OS X Dictionary Data |
| dicx | Redatam Binary Dictionary Data |
| did | Adobe Bridge DID Data |
| did | Verity Server Index Data File |
| dif | MAME CHD Diff Data |
| dif | OS/2 Warp Display Information |
| diffbase | Windows Diagnostics Tracking Diffbase Data |
| dih | MODELLER Dihedral Angles Data |
| dii | AD Summation iBlaze Data |
| dii | TrialDirector Load Data |
| dil | DesignComposer Presentation Input Script |
| dil | WordExpress DIL Data |
| dim | Adobe Dimension Geometry Data |
| dim | Direct Internet Message Encapsulation Data |
| dim | TripleSat DIMAP Data |
| dime | Direct Internet Message Encapsulation Data |
| din | WRAP DAY Input Data |
| dinfo | DivX Temporary Video Info |
| dip | DVDINFOPro Data |
| dipx | DVDINFOPro Data |
| dir | ArcView INFO Directory Manager Data |
| dir | Microsoft SharePoint Server 2007 Temporary Data |
| dir | Procomm Plus Dialing Directory |
| dir | WOW! Diagnostic Directory Data |
