| Extension | File Description |
| .DQH | Uncommon Files |
| .DQI | Uncommon Files |
| .DQJ | Uncommon Files |
| .DQK | Uncommon Files |
| .DQL | Uncommon Files |
| .DQM | Uncommon Files |
| .DQN | Uncommon Files |
| .DQO | Uncommon Files |
| .DQP | Uncommon Files |
| .DQQ | Uncommon Files |
| .DQR | Uncommon Files |
| .DQS | Uncommon Files |
| .DQT | Uncommon Files |
| .DQU | Uncommon Files |
| .DQV | Uncommon Files |
| .DQW | Uncommon Files |
| .DQX | Uncommon Files |
| .DQY | Database Files |
| .DQZ | Uncommon Files |
| .DR | Misc Files |
| .DR$ | Uncommon Files |
| .DR0 | Uncommon Files |
| .DR1 | Uncommon Files |
| .DR2 | Uncommon Files |
| .DR3 | Uncommon Files |
| .DR4 | Uncommon Files |
| .DR5 | Uncommon Files |
| .DR6 | Uncommon Files |
| .DR7 | Uncommon Files |
| .DR8 | Uncommon Files |
| .DR9 | Uncommon Files |
| .DRA | CAD Files |
| .DRAFT | Uncommon Files |
| .DRAG | Uncommon Files |
| .DRAGON | Uncommon Files |
| .DRAGONSFUN | Uncommon Files |
| .DRAT | Uncommon Files |
| .DRAW | Uncommon Files |
| .DRB | Uncommon Files |
| .DRC | Misc Files |
| .DRD | Uncommon Files |
| .DRE | Uncommon Files |
| .DREAM | Video Files |
| .DREAMING | Uncommon Files |
| .DREAMS2 | Uncommon Files |
| .DRES | Developer Files |
| .DRF | Data Files |
| .DRG | CAD Files |
| .DRH | Uncommon Files |
| .DRI | Uncommon Files |
| .DRIFT | Uncommon Files |
| .DRINDX | Uncommon Files |
| .DRIVE | Uncommon Files |
| .DRIVER | Uncommon Files |
| .DRIVERS | Uncommon Files |
| .DRIVES | Uncommon Files |
| .DRJ | Uncommon Files |
| .DRK | Uncommon Files |
| .DRL | Data Files |
| .DRM | Settings Files |
| .DRML | Uncommon Files |
| .DRMX | Uncommon Files |
| .DRN | Uncommon Files |
| .DRO | Uncommon Files |
| .DRP | Uncommon Files |
| .DRPF | Uncommon Files |
| .DRQ | Uncommon Files |
| .DRR | Uncommon Files |
| .DRS | Uncommon Files |
| .DRT | Uncommon Files |
| .DRU | Uncommon Files |
| .DRUG | Uncommon Files |
| .DRUM | Uncommon Files |
| .DRUMS | Uncommon Files |
| .DRV | System Files |
| Extension | File Description |
| .DRVR | Uncommon Files |
| .DRW | Vector Image Files |
| .DRWHO | Uncommon Files |
| .DRX | Uncommon Files |
| .DRY | Uncommon Files |
| .DRZ | Raster Image Files |
| .DR_ | Uncommon Files |
| .DS | Audio Files |
| .DS0 | Uncommon Files |
| .DS1 | Uncommon Files |
| .DS2 | Uncommon Files |
| .DS2RES | Uncommon Files |
| .DS3 | Uncommon Files |
| .DS4 | Uncommon Files |
| .DS5 | Uncommon Files |
| .DS6 | Uncommon Files |
| .DS7 | Uncommon Files |
| .DS8 | Uncommon Files |
| .DS9 | Uncommon Files |
| .DSA | 3D Image Files |
| .DSASAVE | Uncommon Files |
| .DSB | Backup Files |
| .DSC | Misc Files |
| .DSCE | Uncommon Files |
| .DSCMD | Uncommon Files |
| .DSCRIP | Uncommon Files |
| .DSD | Data Files |
| .DSDF | Uncommon Files |
| .DSDICT | Uncommon Files |
| .DSDLL | Uncommon Files |
| .DSE | 3D Image Files |
| .DSES | Uncommon Files |
| .DSF | Audio Files |
| .DSG | CAD Files |
| .DSH | Uncommon Files |
| .DSI | 3D Image Files |
| .DSJ | Uncommon Files |
| .DSK | Disk Image Files |
| .DSL | Uncommon Files |
| .DSM | Audio Files |
| .DSMAP | Uncommon Files |
| .DSN | Database Files |
| .DSN6 | Uncommon Files |
| .DSO | 3D Image Files |
| .DSP | Audio Files |
| .DSPACKAGE | Uncommon Files |
| .DSPARTY | Uncommon Files |
| .DSPLUGIN | Uncommon Files |
| .DSQ | Uncommon Files |
| .DSQSAVE | Uncommon Files |
| .DSR | Uncommon Files |
| .DSRES | Uncommon Files |
| .DSS | System Files |
| .DSSAVE | Uncommon Files |
| .DSSC | Text Files |
| .DSSL | Uncommon Files |
| .DSSLIDESHO | Uncommon Files |
| .DSST | Uncommon Files |
| .DST | CAD Files |
| .DSTF | Uncommon Files |
| .DSU | Uncommon Files |
| .DSV | 3D Image Files |
| .DSW | Settings Files |
| .DSX | Data Files |
| .DSY | Data Files |
| .DSZ | Data Files |
| .DS_STORE | Settings Files |
| .DT | Uncommon Files |
| .DT0 | GIS Files |
| .DT1 | GIS Files |
| .DT2 | Raster Image Files |
| .DT3 | Uncommon Files |
| .DT4 | Uncommon Files |
| .DT5 | Uncommon Files |
| .DT6 | Uncommon Files |
