Interface fundamentals

The fundamental characteristic of the new interface is that commands that were formerly located on panel bars and toolbars are now located on tabs.
Classic View   Ribbon View

Commands that were formerly found on the various common menus are also located on the tabs.
Classic View   Ribbon View

Commands that were formerly found on the File menu are now located on the Application menu.
Classic View   Ribbon View

Although the change to the tabs is a fundamental change to the interface, other interface structures remain unchanged.