A file extension, or file name extension, is the letters immediately shown after the last period in a file name. For example, the file extension.txt has an extension of .txt. This extension allows the ...

Convert OpenOffice.org Calc spreadsheets into a Microsoft Excel file to take advantage of Excel's built-in tools. OpenOffice.org spreadsheets default to a .xsc file extension, which certain versions ...

Whether you're looking at documents regarding business analysis, performance reporting or financial management, you might come across a special type of Microsoft Excel spreadsheet with the file ...