Extensive knowledge of the spreadsheet excel, data entry, insert function, insert graphics. Excel allows the user to define the appearance of spreadsheets (fonts, character attributes and cell appearance). It also allows to introduce intelligent cell recomputation, where only cells dependent on the cell being modified are updated (previous spreadsheet programs recomputed everything all the time or waited for a specific user command). We can use auto-fill, the ability to drag and expand the selection box to automatically copy cell or row contents to adjacent cells or rows, adjusting the copies intelligently by automatically incrementing cell references or contents. Also we can use extensive graphing capabilities.