| 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 | HammerTap DeepAnalysis Save |
| dab | OrangeCD Database |
| dad | Chromeleon Audit Trail Data |
| dad | Chromeleon Channel Raw Data |
| dad | Chromeleon Control Panel |
| dad | Chromeleon Generic Driver Configuration |
| daemonscript | Daemon Tools Script |
| daf | Digital Anchor Data |
| dai | Dream Aquarium Patch |
| dak | Debian Archive Kit Data |
| dal | Download Accelerator Plus List |
| dam | DeltaMaster Analysis Model |
| dan | D-MAS Analysis Data |
| dap | Download Accelerator Plus Partial Data |
| daq | Data Acquisition Toolbox File |
| dartclip | Dartfish inTheAction Clip Metadata |
| das | Autodesk Simulation Mechanical DDAM Stress Output |
| das | DeltaMaster Analysis Session Data |
| das | Download Accelerator Plus File List |
| dash | Dashlane Profile |
