The band at the top of the Excel 2007 window is the Ribbon. The Ribbon is made up of different tabs. Each tab is related to specific kinds of work that people do in Excel. You click the tabs at the top of the Ribbon to see the different commands on each tab. The Home tab, the first tab on the left, contains the everyday commands that people use the most.
Commands are organized in small related groups. For example, commands to edit cells are grouped together in the Editing group, and commands to work with cells are in the Cells group.