| weavelibrary | Corel Painter Weave Library |
| webarchive | Safari Web Archive |
| webbookmark | Safari Web Bookmark Data |
| webex | WebEx Recording File |
| webhistory | Safari Web History Data |
| webinar | GoToWebinar Session Data |
| weboogl | WebOOGL Data |
| webpart | Microsoft Sharepoint Web Part |
| webtest | Fiddler Saved WebTest Data |
| webx | Akamix Saved Search Data |
| wed | Mozilla Firefox Bookmark Backup Data |
| wef | Microsoft Exchange Workflow Process Data |
| weg | PTV VISSIM Path Data |
| weights | SAM Sequence Weights Data |
| wel | Heliosoft Seismaster Input Well Path |
| wel | MODFLOW Well Package |
| wells | ParFlow Well Output Data |
| wenlin | Wenlin Software Data |
| wenlinbin | Wenlin Software Binary Data |
| wenlindb | Wenlin Software Database |
| wenlinfc | Wenlin Software Flashcards Data |
| wenlinfx | Wenlin Software FX Data |
| wenlintree | Wenlin Software Tree Data |
| wes | WE7000 Control Software Setup Data |
| wex | WexView Browser Course Data |
| wf | Agilent Infiniium Oscilloscope Binary Waveform Data |
| wf4 | PTC Creo Parametric Symbol Data |
| wfc | Wink Flash Control Bar Data |
| wfd | Microsoft Exchange Workflow Process Definition |
| wff | Dataplore Wavelet Filter |
