Apple's 'sneak peek' of iPhone OS 4 in 2010

In yet another not-so-subtle invitation, Apple's early 2010 event brought the unveiling of iPhone OS 4.0, which made its way to the just-launched first-generation iPad a few months later.

The software's crowning feature was multitasking, a much-requested feature from users, as well as a new way to organize applications on the home screen with folders. The event also served as the introduction to iAd, Apple's mobile-advertising platform for iOS.