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.
XLS files are spreadsheet files created by Microsoft Office Excel. An Excel spreadsheet can contain anything from images and plain text to graphs and tables and can be opened using Excel. If a ...
How-To Geek on MSN
Don't just hit save: 5 Excel formats that will change the way you work
Upgrade from standard Excel workbooks to specialized formats that shrink, shield, and streamline your spreadsheets.
Some results have been hidden because they may be inaccessible to you
Show inaccessible results