On June 6, 2011, Apple held its annual keynote at the Apple Worldwide Developers Conference in San Francisco, Calif, where it introduced new iterations of many of its products, including Mac OS X and iOS.

One of the products announced was iOS 5, the successor to iOS 4, which powers most of the mobile phones and devices created by Apple, including the iPhone, iPod Touch, and iPad.

iOS 5 introduces many new features compared to 4, including a new notifications system, Twitter integration, and wireless syncing.

Some of the features in the new version of Mac OS X, OS X Lion, include Launchpad, an iOS-like interface for launching apps, Mission Control, an extended version of Exposé to show all windows that are open, and simpler and smoother multi-touch gestures.

Another product announcement was that of iCloud (logo pictured to the right), a new cloud storage service by Apple that will let users sync anything from music to files, for free, over the Internet.  It will eventually replace the MobileMe service.

OS X Lion will be available in July in the Mac App Store for Snow Leopard users, and iOS 5 is coming this fall, potentially with a simultaneous release of a new iPhone model.