When you work in Excel, your work is saved into your computer's memory, but is not written to your hard disk. Spreadsheet information in your computer's memory is lost as soon as you turn off your computer or exit Excel. In order to keep your spreadsheets for future use, you need to save them.

Saving means writing to your computer's hard disk. Data on your hard disk is not lost when your computer is shut down. You can save your file in any location or directory you want to save. (For a detailed tutorial about files, folders, and saving files, see the Windows tutorial series on www.evisa.com or www.screenbooks.net).