| .WAV | Microsoft Corporation | 音频文件 | WAVE Audio File | Microsoft Windows Media Player | Microsoft Corporation |
| .WAX | Microsoft Corporation | 音频文件 | Windows Media Audio Redirect | Microsoft Windows Media Player | Microsoft Corporation |
| .WDF | Workshare | 数据文件 | Workshare Compare DeltaFile | Microsoft Windows Media Player | Microsoft Corporation |
| .WEBM | Google | 视频文件 | WebM Video File | Microsoft Windows Media Player | Microsoft Corporation |
| .WM | Microsoft Corporation | 视频文件 | Windows Media File | Microsoft Windows Media Player | Microsoft Corporation |
| .WMA | Microsoft Corporation | 音频文件 | Windows Media Audio File | Microsoft Windows Media Player | Microsoft Corporation |
| .WMD | Microsoft Corporation | 视频文件 | Windows Media Download Package | Microsoft Windows Media Player | Microsoft Corporation |
| .WMDB | Microsoft Corporation | 数据库文件 | Windows Media Database File | Microsoft Windows Media Player | Microsoft Corporation |
| .WMS | Microsoft Corporation | 设置文件 | Windows Media Skin | Microsoft Windows Media Player | Microsoft Corporation |
| .WMV | Microsoft Corporation | 视频文件 | Windows Media Video File | Microsoft Windows Media Player | Microsoft Corporation |
| .WMZ | Microsoft Corporation | 设置文件 | Compressed Windows Media Player Skin | Microsoft Windows Media Player | Microsoft Corporation |
| .WPL | Microsoft Corporation | 视频文件 | Windows Media Player Playlist | Microsoft Windows Media Player | Microsoft Corporation |
| .WVX | Microsoft Corporation | 视频文件 | Windows Media Video Redirector | Microsoft Windows Media Player | Microsoft Corporation |
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