Lotus 1-2-3 Worksheet 1.0
Readablespreadsheet
Lotus 1-2-3 Worksheet v 1 is a spreadsheet format developed for the spreadsheet, charting, and database software of the same name. Lotus Development Corporation released Lotus 1-2-3 in 1983 and its popularity led to it becoming close to an industry standard through the early 1990s.
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| Extensions | .wks |
|---|---|
| MIME types | application/vnd.lotus-1-2-3application/x-123 |
| Signatures | 000002000404 at byte 0 (Lotus 123 Worksheet 1.0)00000200040406000800 at byte 0 |
| PRONOM | x-fmt/117 |
| Wikidata | Q45347100 |
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From PRONOM, Wikidata. Updated 2026-10-20.