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.wk4 file extension

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Lotus 1-2-3 (version 4) spreadsheet file.

Can you add to this? Do you know of any applications not already listed which will work with .wk4 files, view .wk4 files or open .wk4 files? Are you able to contribute any additional reference information or file format information about .wk4 files or have you spotted any errors or omissions? If so please let us know by emailing us at feedback@cryer.co.uk - Thank you.