| File Extension: | WK4 |
| File Type Description: | Lotus Lotus 1-2-3 V4 Worksheet |
| File Type Developer: | IBM |
| Primary Associated Software: | Gnumeric |
| Primary Software Developer: | Open Source |
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Open Source created the Lotus Lotus 1-2-3 V4 Worksheet (WK4) file for the Gnumeric software series. User statistics infer that these WK4 files are popular with users from United States and most frequently found on the Windows 10 platform. Most of these users are running the Google Chrome web browser.
 | Lotus 1-2-3 by IBM |
 | Gnumeric by Open Source |
 | Corel Quattro Pro by Corel |
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Windows |
 | Mac |
 | Linux |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .LRS | Open Source | eBook Files | Librie Reader Source File |
| .LRX | Sony | eBook Files | Sony Portable Reader File |
| .YM | Atari Corporation | Audio Files | Atari ST Audio File |
| .DJVU | LizardTech | Raster Image Files | DjVu Image |
| .LAB | Corel | Page Layout Files | WordPerfect Label Definition File |
| .WN | WN | Web Files | WN Web File |
| .KHF | Open Source | Data Files | Kwalitan Data File |
| .BRU | Open Source | Data Files | Brutus Restore Data |
| .SPX | Xiph.Org | Audio Files | Ogg Vorbis Speex File |
| .CUB | Microsoft Corporation | Data Files | Analysis Services Cube File |
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