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| Extension | File Type Developer | File Category | File Type Description | Primary Software | Primary Software Developer |
|---|---|---|---|---|---|
| .WB2 | Threefold Photos, Inc. | Spreadsheet Files | Webshots Picture File | Webshots Desktop Connect | Threefold Photos, Inc. |
| .WG1 | IBM | Spreadsheet Files | Lotus 1-2-3 Worksheet File | Lotus 1-2-3 | IBM |
| .WJ3 | IBM | Spreadsheet Files | Lotus 1-2-3 Worksheet File | Lotus 1-2-3 | IBM |
| .WK! | IBM | Spreadsheet Files | Lotus 1-2-3 Spreadsheet | Apache OpenOffice | Apache Software Foundation |
| .WKE | IBM | Spreadsheet Files | Lotus 1-2-3 Educational Version Worksheet | Microsoft Excel | Microsoft Corporation |
| .WKQ | Corel | Spreadsheet Files | Quattro Pro For DOS Spreadsheet File | Corel Quattro Pro | Corel |
| .WKZ | Informix Corporation | Spreadsheet Files | Wingz Spreadsheet | Wingz | Informix Corporation |
| .WLS | Renault | Spreadsheet Files | R-Link Update File | R-Link Toolbox | Renault |
| .WQ! | Corel | Spreadsheet Files | Corel Quattro Pro Compressed Spreadsheet | Corel Quattro Pro | Corel |
| .WQ0 | Corel | Spreadsheet Files | Quattro Pro For DOS Spreadsheet File | Corel Quattro Pro | Corel |
| .WQ1 | Corel | Spreadsheet Files | Quattro Pro For DOS Spreadsheet File | Corel Quattro Pro | Corel |
| .WQ2 | Corel | Spreadsheet Files | Quattro Pro For DOS Spreadsheet File | Corel Quattro Pro | Corel |
| .WR! | IBM | Spreadsheet Files | Lotus 1-2-3 Spreadsheet | Apache OpenOffice | Apache Software Foundation |
| .WR1 | IBM | Spreadsheet Files | Lotus Symphony Spreadsheet | IBM Lotus Symphony | IBM |
| .WS | MicroPro International Corp. | Spreadsheet Files | WordStar Document | Corel WordPerfect X8 | Corel |
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