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.

Businesses that switch to Mac computers may encounter problems when attempting to open some file types, such as Excel Spreadsheet (XLS) files. Macs do not have a native program for opening XLS files, ...

If you use Microsoft Excel on your Mac, you can save the spreadsheets you create and open them in Numbers, Apple’s spreadsheet app. It’s a handy feature to use in case you can’t access Microsoft’s ...

How to convert XLS and JSON files to CSV in Linux with csvkit Your email has been sent Sometimes you just need a quick means of converting a spreadsheet to a comma-separated values file. When you ...

This month's monster security patch for Office breaks Excel when it tries to open HTML files, and it seems unlikely Microsoft will fix the problem Excel users are reporting an odd bug in the way Excel ...