Apple's 'single user' personal devices use iOS for the iPod Touch, iPhone, and iPad.  This is in contrast to Apple's multi-user products that run OS X providing a more classic workstation based solution.  Key to iOS devices is the 'tethering' notion, where each device it associate with a workstation for backup and administration.  Current Microsoft Windows and Apple OS X workstation must have iTunes application installed to provide tethering to iOS devices.  iPhoto and related workstation applications indirectly share information with iOS devices through iTunes typically.

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