||The .xlr file extension relates to spreadsheets created by Microsoft Works suite. Microsoft Works provided a less expensive and more simplistic spreadsheet program than Microsoft Excel. Often bundled with new PCs, the suite of products was discontinued in 2008. The file type was particularly unpopular due to a lack of compatability with other programs, including Microsoft Excel.
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||An .xlr file allows rows and columns to be defined in a file within Microsoft Works. Other features commonly found in other spreadsheet applications are also found in .wks files including formulas, charts and graphs. Although Excel 2003 supports .wks files, Excel 2007 does not support them.
||More details on Microsoft Works
Microsoft Works Support Pages
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