| d1 | Progress OpenEdge Database |
| d10 | IRIG 106 Recording Directory Data |
| d10 | MicroSim PCBoard NC Drill Data |
| d11 | Macro Mania Data |
| d2 | Progress OpenEdge Database |
| d2ct | Disinfectant for Mac Data |
| d2e | Gaussian Two-Electron Integral Derivative File |
| d2f | Dvd2Avi D2F Data |
| d3 | Progress OpenEdge Database |
| d3d | Game Maker 3D Data |
| d3d | Microsoft DirectX D3D Data |
| d3d | Strata Foto 3D Digital 3D Data |
| d3p | DigitalPrintLab 3 Data |
| d3plot | Oasys D3PLOT Data |
| d4 | Titan Showfile |
| d4b | Titan Showfile Backup |
| d7d | Dewesoft 7 Data |
| d7s | Dewesoft 7 Setup Data |
| d7t | Dewesoft 7 Sequence Data |
| d83 | GAEB 1990 Data File |
| da0 | Windows Registry Database Backup |
| da1 | Windows Registry Database Backup |
| da2 | Ad-Aware License Data |
| da2 | HammerTap DeepAnalysis Save |
| dab | Autodesk AutoCAD Civil 3D Rainfall Distribution Table |
| dab | OrangeCD Database |
| dad | Chromeleon Audit Trail Data |
| dad | Chromeleon Channel Raw Data |
| dad | Chromeleon Control Panel |
| dad | Chromeleon Generic Driver Configuration |
