| 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 |
| wqz | Water Quality Zone 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 |
| wsad | OpenEdge Web Services Application Descriptor |
| wsb | Microsoft Sharepoint Document Set |
| wseq | Workswell Recorded Thermal Sequence |
| wsg | WAsP Site Location Data |
| wsk | Ashampoo Media Player Skin |
| wskn | Wise Care 365 Skin Data |
| wsl | Win-Situ Log |
| wsml | Web Service Modeling Language Data |
| wspak | WebsitePanel Backup |
| wsr | Mail.dat Walk Sequence File |
| wsstyles | Windows Sidebar Styler Style |
