Microsoft Excel has several features designed to help you recover unsaved versions of files and prevent data loss.
XLS files are Excel workbook files created in Excel 97 or Excel 2003. The 2007, 2010 and 2013 versions of the program use the XLSX format by default to save workbooks, but can also use the XLS format.
Microsoft discontinued the lower-priced Microsoft Works suite, but you can convert old documents to use current Microsoft Office formats. If you have a spreadsheet from Works versions 6 and later, you ...
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