An essay from the Windows Vista shell team about menus: why they're good, bad ... how ribbons are different ... and the new User Experience (UX) guidelines
expressiveness: Hey Firefox? Select this page, translate it to Spanish, encrypt it with my mom's public key, email it to her, and oh yeah save this chain of commands as a new command so I can use it later.
Conceptual and task-oriented information. Guides include overviews, tutorials, programming guides, server administration guides, and, for developer tools, user guides.