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A Workbook automatically shows in the workspace when you open Microsoft Excel 2003. Each workbook contains three worksheets. A worksheet is a grid of cells, consisting of 65,536 rows by 256 columns. Spreadsheet information--text, numbers or mathematical formulas--is entered in the different cells.
Column headings are referenced by alphabetic characters in the gray boxes that run across the Excel screen, beginning with the Column A and ending with Column IV.
Rows are referenced by numbers that appear on the left and then run down the Excel screen. The first row is named Row 1 and the last row is named 65536.
Important Terms

• A workbook is made up of three worksheets.
• The worksheets are labeled Sheet1, Sheet2, and Sheet3.
• Each Excel worksheet is made up of columns and rows.
• In order to access a worksheet, click on the tab that says Sheet#