| File Extension: | WK1 |
| File Type Description: | Lotus Worksheet |
| File Type Developer: | IBM |
| Primary Associated Software: | Microsoft Excel |
| Primary Software Developer: | Microsoft Corporation |
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Apache Software Foundation created the Lotus Worksheet (WK1) file for the Apache OpenOffice Calc software series. User statistics infer that these WK1 files are popular with users from United States and most frequently found on the Windows 10 platform. A high percentage of these users browse the web using Google Chrome.
 | Microsoft Excel by Microsoft Corporation |
 | LibreOffice Calc by The Document Foundation |
 | Corel Quattro Pro by Corel |
 | Lotus 1-2-3 by IBM |
 | IBM Collaboration Solutions by IBM |
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Windows |
 | Mac |
 | iOS |
 | Android |
 | Linux |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .WPX | Microsoft Corporation | System Files | Printer Description File 2 |
| .P5X | Microsoft Corporation | System Files | Microsoft Windows System Data |
| .DRW | Corel | Vector Image Files | DESIGNER Drawing |
| .SBL | Adobe Systems Incorporated | Graphic Files | Shockwave Flash Object |
| .ONECACHE | Microsoft Corporation | Temporary Files | Microsoft OneNote Cache File |
| .TTS | SumTotal Systems | Data Files | ToolBook Translation System File |
| .JPN | Microsoft Corporation | System Files | Windows Japanese Noise-Word List File |
| .COV | Microsoft Corporation | Page Layout Files | Fax Cover Page File |
| .SNIPPET | Microsoft Corporation | Developer Files | Visual Studio IntelliSense Code Snippet |
| .PLR | Re-Logic | Game Files | Terraria Player File |
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