Excel provides three types of tabs on the Ribbon : Ribbon « Introduction « Microsoft Office Excel 2007 Tutorial

1. Microsoft Office Excel 2007 Tutorial
2. Introduction
3. Ribbon

The first type is called a standard tab, 
           such as Home, Insert, Page Layout, Formulas, Data, Review, View, and Add-In

The second type is called a contextual tab, 
           such as Picture Tools, Drawing, or Table that appear only when they are needed

The third type is called a program tab, 
           such as Print Preview that replace the standard set of tabs

1.2.Ribbon
	1.2.1.	The Ribbon replaces menus, toolbars, and most of the task panes found in Excel 2003
	1.2.2.	To minimize the Ribbon, double-click the name of the tab
	1.2.3.	Excel provides three types of tabs on the Ribbon
	1.2.4.	The Excel commands are organized in groups on the Ribbon, Office menu , Quick Access Toolbar, and Mini-Toolbar
	1.2.5.	Minimize the Ribbon
	1.2.6.	Set Developer Options