When you consume content, you do so on an authorized device. You can play or use content (music, movies, TV shows, apps, etc.) on an unlimited number of iDevices, but you can only play or use content on up to five computers at any one time. Part of Apple’s Digital Rights Management (DRM) system requires that all content endpoints – an iPhone, an iPod, an iPad, even your Mac or PC – be authorized to use the content you buy and use on them. And that’s the key thing – Authorization. Working with iTunes, regardless of platform, is a pretty cool thing. iTunes gives you a desktop interface to all of your mobile content, and you get to manage all of your mobile content with your computer … provided it’s authorized to do so.
