While there is a way for you to open two Excel workbooks at the same time, you can also open multiple spreadsheets in separate windows. Learn how!

Excel for Web upgrade Going forward, Microsoft Excel for the Web will now allow users to open and edit large files from SharePoint up to 100MB in size.

If done correctly, Microsoft Excel will open the .csv file, and the results will be the same as with the .txt file process.

Microsoft Word can accommodate a surprising number of file formats, and even take in Excel and PowerPoint data, though it might look funny. Here's how.

Numbers has the ability to open Excel files so you can work on them. You can also export spreadsheets in Numbers so that they are compatible with Excel.