January 2010 -- Apple announces the iPad tablet computer, which becomes an instant success and spawns a new category of mobile computing devices.

September 2010 -- Jobs appears on stage in San Francisco to announce Apple's second-generation Apple TV set-top box, which streams movies from the Internet or mobile devices like the iPhone and iPad directly to TV sets.

January 2011 -- Apple announces Jobs is taking a medical leave of absence, without specifying a reason for the leave or how long he'd be away. Questions are raised about the severity of Jobs' health problems, and its impact on the company's stock, product development and business operations.

March 2011 -- Taking a break from his medical leave, Jobs makes an appearance at an event in San Francisco to introduce the iPad 2.

June 2011 -- While still on leave, Jobs appears at the company's Worldwide Developers Conference in San Francisco to introduce the iCloud and iOS 5. A few days later, Jobs appears in front of the Cupertino City Council with a proposal to build a spaceship-like campus in the city.