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by yuhong 4473 days ago
I think you can even save in Excel 5.0/95 format in current versions of Excel.
1 comments
bananas 4473 days ago
You can open wordperfect 5.1 (1989) in Office 2013 no problems.

Numbers can't even open ODS files at all, destroys iWork 09 documents and pretty much sticks a fork in most xslx documents.

link