| wmts | Web Map Tile Service Data |
| wmu | WIND Tunnel WIND Data |
| wmw | Likno Web Modal Windows Builder Data |
| wn | WN Web Server Data |
| wnc | WorkNC CAD Part Data |
| wnd | FARSITE Wind Data |
| wnd | SOBEK Wind Data |
| wnd | SWAT Wind Speed Input Data |
| wne | WIDI Note Editor Data |
| wni | Generations Family Tree Data |
| wni | Wisco RC21 Virtual Com Port Settings |
| wnk | Wink Presentation |
| wnu | WIND Tunnel UMTS Measurement Data |
| wock | Route 66 for Mac Data |
| wof | Aveva MDS Witch Hanger Data |
| wog | WAsP Obstacle Group |
| wop | Wonderland Adventures Editor Object |
| word | LX-SenseAnnotator Word Data |
| wordlist | Desktop Poet Word List |
| work | Bibble Work Queue |
| workspace | Adobe Bridge Workspace Data |
| wot | Web of Trust Data |
| wot | WebEx Recording File |
| wov | Cakewalk Sonar Picture Cache |
| wox | MapInfo Professional Additional Workspace Data |
| wp1 | MODAWEC Output Data |
| wpa | WorkPlace Pro Utilities Alarm Page Builder Data |
| wpb | WorkPlace Pro Utilities Backup and Transport Data |
| wpc | Corel WordPerfect Character Mapping Data |
| wpc | WorkPlace Pro Utilities Data Collector Data |
