The document discusses the differences between Microsoft Word 2003 and Word 2007. It focuses on the changes to the user interface in Word 2007, including the introduction of the Ribbon, which spans the top of the application and contains tabs, groups, and commands. It also discusses other interface elements introduced in Word 2007 like the Office button, Quick Access Toolbar, and mini toolbar. Keyboard shortcuts are also covered, noting both retained shortcuts from prior versions as well as new shortcuts associated with the Ribbon interface.