| wc | WorldCraft Data |
| wc2 | Working Time Tracker Data |
| wca | WinCatalog Standard Database |
| wcap | Mac OS X Wireless Diagnostics Captured Packets |
| wcat | WinCatalog Standard Database |
| wcb | WinCDR Data |
| wcd | CD Menu Builder Data |
| Condes Event Data |
| Corel WordPerfect Macro Token List |
| Microsoft Works Calendar |
| wcf | FRAMES Water Concentration File |
| Warrior Calibration Data |
| WebEx Saved Chat Session |
| wch | WellCAD Log Header Data |
| wcinv | Windows Meeting Space Data |
| wck | WaterCAD Data |
| wcl | WellCAD Log |
| WinCatalog Light Database |
| WinCon Controller Library |
| wcmm | Bamboo Dock Application Data |
| wcp | Corel WordPerfect Product Information Data |
| Warrior Calibration Plot |
| wcrypt | Webcrypto-crypt Encrypted Data |
| wcs | Astrometry.net WCS Data |
| WhopSee Compressed Skin |
| wct | WCT Reader Index File |
| wcu | CueCard Saved Flashcards Data |
| wcxf | WorldCard Mobile Exchange Data |
| wcz | Chameleon Clock Wallpaper |
| wd | Corel Paint Shop Pro WD Image |
| wd3 | Offline Explorer Data |
| wda | AutoCAD Electrical Project User Attributes Data |
| wdat | WildTangent Data |
| wdc | SOBEK Wind Data |
| WinDaq Waveform Browser Data |
| wdcd | Microsoft Word 5 for Mac Custom Dictionary Data |
| wdd | Autodesk AutoCAD Electrical Description List |
| wdf | Petrosys Well Data |
| ReliaSoft Weibull++ Data |
| Renishaw WiRE Data |
| WinGenea Genealogy Data |
| Wonderland Adventures Media Data |
| wdgp | Microsoft Word for Mac Add-in |
| wdgt | Adobe Captivate Widget Data |
| wdh | WinDaq High Resolution Data |
| wdl | AutoCAD Electrical Project Labels Data |
| Conitec Gamestudio WDL Data |
| Microsoft Windows XP Watchdog Log |
| wdll | Microsoft Word 6 for Mac Add-in |
| wdm | BASINS Meteorological Database |
| wdmon | Mac OS X Wireless Diagnostics Monitor Data |
| wdn | AutoCAD Electrical Project Terminal Numbering Data |
| wdq | Offline Explorer Queue |
| WinDaq Acquired Data |
| wdr | AutoCAD Electrical Project Ratings Data |
| wdseml | Thunderbird Searchable Email File |
| wdsheet | WebDrive Sheet Data |
| wdslide | WebDrive Slide Data |
| wdsp | WebDrive Data |
| wdt | AutoCAD Electrical Project Titles Data |
| wdv | TracePlus Web Detective Data |
| wdw | AutoCAD Electrical Project Wires Data |
| wdx | Mathematica WDX Data |
| wdx9 | Microsoft Word for Mac Wizard Data |
| wea | Autodesk Ecotect Analysis Weather Data |
| weavelibrary | Corel Painter Weave Library |
| web | BlackWidow Website Description |
| webarchive | Safari Web Archive |
| webbookmark | Safari Web Bookmark Data |
| webex | WebEx Recording File |
| webhistory | Safari Web History Data |
| webinar | GoToWebinar Session Data |
| webintents | Web Intents 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 |
| WageEasy Company Database |
| wef | Microsoft Exchange Workflow Process Data |
