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.

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If you work with multiple Excel files over the course of a workday, and especially if you use a dual-monitor setup, you might wonder how you can launch each Excel file in its own window so you can ...

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If you’re a full-time spreadsheet jockey, or just a casual number-cruncher, you’ve come to know and either love or hate Excel’s interface. Well, your world just changed. Throw away almost everything ...

What if the very tool you rely on for precision and productivity could evolve without disrupting your workflow? For decades, Microsoft Excel has been the backbone of data analysis, yet its growth has ...

Need to access older versions of certain Office files and suddenly can't? Did you install SP3? If you need to access old Microsoft file formats for early versions of Word, Excel, or Powerpoint -- but ...

With the introduction of Office 2007, Microsoft abandoned the age-old .doc format in favor of the newer .docx (also known as the Office Open XML format). If you’re still using Word 2003 or an earlier ...