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’s updated spreadsheet tool isn’t getting a lot of new, whiz-bang features, but it is becoming more functional. That’s something both new and experienced users will enjoy—especially a new ...

I once made money moonlighting as a VisiCalc and Lotus 1-2-3 instructor before Steve Ballmer ever typed “=sum(Profits)” in an Excel 1.0 spreadsheet cell. And a friend and former colleague from my ...

Spreadsheets are used by businesses around the world to organize data, from sales figures to contact information from customers. But disorganization, including extra rows and columns, can make ...

If you see the “The file couldn’t open in protected view” error while opening Microsoft Excel, the solutions listed in this post may help you resolve the issue ...

When an Excel file goes haywire, don't give up hope. Using one of these recovery tricks, you may still be able to salvage the data. When an Excel file goes haywire, don’t give up hope. Using one of ...