| Extension | File Description |
| .WM | Video Files |
| .WM$ | Uncommon Files |
| .WM0 | Uncommon Files |
| .WM1 | Uncommon Files |
| .WM2 | Uncommon Files |
| .WM2D | Uncommon Files |
| .WM3 | Uncommon Files |
| .WM4 | Uncommon Files |
| .WM5 | Uncommon Files |
| .WM6 | Uncommon Files |
| .WM7 | Uncommon Files |
| .WM8 | Uncommon Files |
| .WM9 | Uncommon Files |
| .WMA | Audio Files |
| .WMASCOT | Uncommon Files |
| .WMB | Uncommon Files |
| .WMC | Uncommon Files |
| .WMD | Video Files |
| .WMDB | Database Files |
| .WMDF | Uncommon Files |
| .WME | Uncommon Files |
| .WMF | Vector Image Files |
| .WMG | Uncommon Files |
| .WMH | Uncommon Files |
| .WMI | Uncommon Files |
| .WMJ | Uncommon Files |
| .WMK | Uncommon Files |
| .WML | Web Files |
| .WMLC | Uncommon Files |
| .WMLRC | Uncommon Files |
| .WMLS | Uncommon Files |
| .WMLSC | Uncommon Files |
| .WMM | Uncommon Files |
| .WMN | Uncommon Files |
| .WMO | Game Files |
| .WMP | Raster Image Files |
| .WMQ | Uncommon Files |
| .WMR | Uncommon Files |
| .WMS | Settings Files |
| .WMT | Uncommon Files |
| .WMU | Uncommon Files |
| .WMV | Video Files |
| .WMW | Uncommon Files |
| .WMX | Video Files |
| .WMXML | Uncommon Files |
| .WMY | Uncommon Files |
| .WMZ | Settings Files |
| .WN | Web Files |
| .WN0 | Uncommon Files |
| .WN1 | Uncommon Files |
| .WN2 | Uncommon Files |
| .WN3 | Uncommon Files |
| .WN4 | Uncommon Files |
| .WN5 | Uncommon Files |
| .WN6 | Uncommon Files |
| .WN7 | Uncommon Files |
| .WN8 | Uncommon Files |
| .WN9 | Uncommon Files |
| .WNA | Uncommon Files |
| .WNB | Uncommon Files |
| .WNC | Uncommon Files |
| .WND | Uncommon Files |
| .WNE | Uncommon Files |
| .WNF | Uncommon Files |
| .WNG | Uncommon Files |
| .WNH | Uncommon Files |
| .WNI | Uncommon Files |
| .WNJ | Uncommon Files |
| .WNK | Data Files |
| .WNL | Uncommon Files |
| .WNM | Uncommon Files |
| .WNN | Uncommon Files |
| .WNO | Uncommon Files |
| .WNP | Uncommon Files |
| .WNQ | Uncommon Files |
| Extension | File Description |
| .WNR | Uncommon Files |
| .WNS | Uncommon Files |
| .WNT | Uncommon Files |
| .WNU | Uncommon Files |
| .WNV | Uncommon Files |
| .WNW | Uncommon Files |
| .WNX | Uncommon Files |
| .WNY | Uncommon Files |
| .WNZ | Uncommon Files |
| .WO | Uncommon Files |
| .WO0 | Uncommon Files |
| .WO1 | Uncommon Files |
| .WO2 | Uncommon Files |
| .WO3 | Uncommon Files |
| .WO4 | Uncommon Files |
| .WO5 | Uncommon Files |
| .WO6 | Uncommon Files |
| .WO7 | Uncommon Files |
| .WO8 | Uncommon Files |
| .WO9 | Uncommon Files |
| .WOA | Web Files |
| .WOB | Uncommon Files |
| .WOC | Uncommon Files |
| .WOD | Uncommon Files |
| .WOE | Uncommon Files |
| .WOF | Uncommon Files |
| .WOFF | Font Files |
| .WOG | Uncommon Files |
| .WOH | Uncommon Files |
| .WOI | Uncommon Files |
| .WOJ | Uncommon Files |
| .WOK | Uncommon Files |
| .WOL | Uncommon Files |
| .WOLX | Uncommon Files |
| .WOM | Uncommon Files |
| .WOMAN | Uncommon Files |
| .WOMEN | Uncommon Files |
| .WON | Uncommon Files |
| .WOO | Uncommon Files |
| .WOP | Uncommon Files |
| .WOQ | Uncommon Files |
| .WOR | GIS Files |
| .WORD | Uncommon Files |
| .WORDCOUNT | Uncommon Files |
| .WORDSUM | Uncommon Files |
| .WORK256SCE | Uncommon Files |
| .WORKBENCH | Uncommon Files |
| .WORKFLOW | Executable Files |
| .WORKOUT | Uncommon Files |
| .WORKS | Uncommon Files |
| .WORKSHEET | Developer Files |
| .WORLD | Game Files |
| .WORM | Uncommon Files |
| .WOS | Uncommon Files |
| .WOT | Video Files |
| .WOU | Uncommon Files |
| .WOV | Uncommon Files |
| .WOW | Audio Files |
| .WOWPROJ | Developer Files |
| .WOX | Uncommon Files |
| .WOY | Uncommon Files |
| .WOZ | Uncommon Files |
| .WP | Text Files |
| .WP0 | Uncommon Files |
| .WP1 | Uncommon Files |
| .WP2 | Uncommon Files |
| .WP3 | Video Files |
| .WP4 | Text Files |
| .WP5 | Text Files |
| .WP6 | Text Files |
| .WP7 | Uncommon Files |
| .WP8 | Uncommon Files |
| .WP9 | Uncommon Files |
| .WPA | Text Files |
| .WPB | Backup Files |
