Resume, one of the new features in OS X Lion, addresses a common complaint among users of desktop OS users. Traditionally, quitting an application in Mac OS X (or any other desktop OS) has meant starting over from square one when you next launch the app. This has also made restarting a Mac particularly painful for users who run multiple applications at once, because after a restart you'll generally have to relaunch them manually, then reload all documents you may have been working on before the restart, resulting in several lost minutes
