| Extension | File Description |
| .DK7 | Uncommon Files |
| .DK8 | Uncommon Files |
| .DK9 | Uncommon Files |
| .DKA | Uncommon Files |
| .DKB | Uncommon Files |
| .DKC | Uncommon Files |
| .DKD | Uncommon Files |
| .DKE | Uncommon Files |
| .DKF | Uncommon Files |
| .DKG | Uncommon Files |
| .DKH | Uncommon Files |
| .DKI | Uncommon Files |
| .DKJ | Uncommon Files |
| .DKK | Uncommon Files |
| .DKL | Uncommon Files |
| .DKM | Uncommon Files |
| .DKN | Uncommon Files |
| .DKO | Uncommon Files |
| .DKP | Uncommon Files |
| .DKQ | Uncommon Files |
| .DKR | Uncommon Files |
| .DKS | Uncommon Files |
| .DKT | Uncommon Files |
| .DKU | Uncommon Files |
| .DKV | Uncommon Files |
| .DKW | Uncommon Files |
| .DKX | Uncommon Files |
| .DKY | Uncommon Files |
| .DKZ | Uncommon Files |
| .DL | Game Files |
| .DL$ | Uncommon Files |
| .DL0 | Uncommon Files |
| .DL1 | Uncommon Files |
| .DL2 | Uncommon Files |
| .DL3 | Uncommon Files |
| .DL4 | Uncommon Files |
| .DL5 | Uncommon Files |
| .DL6 | Uncommon Files |
| .DL7 | Uncommon Files |
| .DL8 | Uncommon Files |
| .DL9 | Uncommon Files |
| .DLA | Uncommon Files |
| .DLB | Uncommon Files |
| .DLC | Encoded Files |
| .DLD | Executable Files |
| .DLDI | Uncommon Files |
| .DLE | Uncommon Files |
| .DLF | Uncommon Files |
| .DLG | GIS Files |
| .DLH | Uncommon Files |
| .DLI | Uncommon Files |
| .DLJ | Uncommon Files |
| .DLK | Uncommon Files |
| .DLL | Web Files |
| .DLM | Misc Files |
| .DLMCACHE | Uncommon Files |
| .DLMPARTIAL | Uncommon Files |
| .DLN | Uncommon Files |
| .DLO | Plugin Files |
| .DLOG | Uncommon Files |
| .DLP | Uncommon Files |
| .DLPF | Uncommon Files |
| .DLQ | Uncommon Files |
| .DLR | Uncommon Files |
| .DLS | Audio Files |
| .DLT | Uncommon Files |
| .DLU | Plugin Files |
| .DLV | CAD Files |
| .DLV3 | Uncommon Files |
| .DLW | Uncommon Files |
| .DLX | CAD Files |
| .DLY | Uncommon Files |
| .DLZ | Uncommon Files |
| .DL_ | Compressed Files |
| .DM | Audio Files |
| Extension | File Description |
| .DM0 | Uncommon Files |
| .DM1 | Uncommon Files |
| .DM2 | Data Files |
| .DM3 | Game Files |
| .DM4 | Uncommon Files |
| .DM5 | Uncommon Files |
| .DM6 | Uncommon Files |
| .DM7 | Uncommon Files |
| .DM8 | Uncommon Files |
| .DM9 | Uncommon Files |
| .DMA | Uncommon Files |
| .DMB | Video Files |
| .DMC | Data Files |
| .DMD | Uncommon Files |
| .DME | Uncommon Files |
| .DMF | Audio Files |
| .DMG | Disk Image Files |
| .DMH | Uncommon Files |
| .DMI | Uncommon Files |
| .DMJ | Uncommon Files |
| .DMK | Uncommon Files |
| .DML | Web Files |
| .DMM | Uncommon Files |
| .DMN | Uncommon Files |
| .DMO | Game Files |
| .DMOD | Uncommon Files |
| .DMP | System Files |
| .DMQ | Uncommon Files |
| .DMR | Uncommon Files |
| .DMS | Disk Image Files |
| .DMSD | Video Files |
| .DMT | Uncommon Files |
| .DMU | Uncommon Files |
| .DMV | Uncommon Files |
| .DMW | Uncommon Files |
| .DMX | Video Files |
| .DMY | Uncommon Files |
| .DMZ | Uncommon Files |
| .DM_1 | Uncommon Files |
| .DM_2 | Uncommon Files |
| .DM_3 | Uncommon Files |
| .DM_4 | Uncommon Files |
| .DM_48 | Uncommon Files |
| .DM_57 | Uncommon Files |
| .DM_59 | Uncommon Files |
| .DM_66 | Uncommon Files |
| .DM_67 | Uncommon Files |
| .DN0 | Uncommon Files |
| .DN1 | Uncommon Files |
| .DN2 | Game Files |
| .DN3 | Uncommon Files |
| .DN4 | Uncommon Files |
| .DN5 | Uncommon Files |
| .DN6 | Uncommon Files |
| .DN7 | Uncommon Files |
| .DN8 | Uncommon Files |
| .DN9 | Uncommon Files |
| .DNA | Data Files |
| .DNA.XML | Uncommon Files |
| .DNASYM | Uncommon Files |
| .DNAX | Uncommon Files |
| .DNB | Uncommon Files |
| .DNC | Video Files |
| .DND | Uncommon Files |
| .DNE | Text Files |
| .DNF | Uncommon Files |
| .DNG | Raster Image Files |
| .DNH | Uncommon Files |
| .DNI | Uncommon Files |
| .DNJ | Uncommon Files |
| .DNK | Uncommon Files |
| .DNL | Misc Files |
| .DNM | Uncommon Files |
| .DNN | Uncommon Files |
| .DNO | Uncommon Files |
