Most often, they are used to process numbers, but they can be used for text, dates and all sorts of other data.
Spreadsheets are very common in business, as they are excellent for handling data such as sales, engineering or financial data.
On the screen, the working area of a spreadsheet looks like a grid. Each rectangle within the grid is called a 'cell'. Cells are identified by their row and column position within the grid.
Formulas are used to perform calculations automatically on the data which has been entered.
Salesmen, teachers, scientists, market researchers and engineers use spreadsheets.