In Excel, a spreadsheet file is called a workbook, and each workbook consists of one or more worksheets. These worksheets are where you do most of your work in Excel, including entering your data and formulas, so you need to know the layout of a typical worksheet.
Cell: A cell is a box in which you enter your spreadsheet data.
Column: A column is a vertical line of cells. Each column has a unique letter that identifies it. For example, the leftmost column is A, and the next column is B.
Row: A row is a horizontal line of cells. Each row has a unique number that identifies it. For example, the top most row is 1, and the next row is 2.
Cell Address: Each cell has its own address, which is determined by the letter and number of the intersecting column and row. For example, the cell at the intersection of column C and row 10 has the address C10.
Mouse Pointer: Use the Excel mouse to select cells.
Range: A range is a rectangular grouping of two or more cells. The range address is given by the address of the top left cell and the address of the bottom right cell. H12:K16 is an example of a range of cells, and it refers to all of the cells selected between column H, cell 12 and column K, cell 16.
Worksheet Tab: The worksheet tab displays the worksheet name. Most workbooks contain multiple worksheets, and you use the tabs to navigate between the worksheets.