When you first installed Microsoft Excel, it should have registered itself as the default program for opening compatible file types, such as .xlsx or .xls. Installing other spreadsheet programs may ...

If you use Microsoft Excel at all to make and edit spreadsheets, you have probably heard of Excel worksheets and workbooks. An Excel workbook is an Excel file that can contain multiple, somewhat ...

Ankush khandelwal asked about compatibility issues between files created in different versions of Microsoft Office–specifically the big changes in file format that came with Office 2007. With Office ...