| wmi | WorlMate Itinerary Data |
| wms | Web Map Service Data |
| wmts | Web Map Tile Service Data |
| wmu | WIND Tunnel WIND Data |
| wn | WN Web Server Data |
| wnd | FARSITE Wind Data |
| wni | Generations Family Tree Data |
| wni | Wisco RC21 Virtual Com Port Settings |
| wnk | Wink Presentation |
| wnu | WIND Tunnel UMTS Measurement Data |
| wof | Aveva MDS Witch Hanger Data |
| wog | WAsP Obstacle Group |
| wop | Wonderland Adventures Editor Object |
| work | Bibble Work Queue |
| wot | WebEx Recording File |
| wot | Web of Trust Data |
| wov | Cakewalk Sonar Picture Cache |
| wox | MapInfo Professional Additional Workspace Data |
| wpi | OS/2 WarpIN Installer |
| wpk | Corel WordPerfect Keyboard Layout |
| wpn | Schedule24 Schedule Data |
| wpo | Holux GM-101 Waypoint |
| wpp | WebPlus Site Data |
| wpr | Holux GM-101 Route |
| wprp | Windows Performance Recorder Recording Profile |
| wpx | WebPlus Site Template |
| wqc | Wondershare QuizCreator Data |
| wqs | WebQuest Surfer Data |
| wr | STK Write Ups File |
| wrf | WebEx Recording File |
| wrg | WAsP Resource Grid |
| wrlk | Web Research Document Link |
| wrr | WAsP Roughness Rose Data |
| wrt | WhistlerMap Waypoints Data |
| wrts | Wrts Data |