At left, Apple CEO Steve Jobs delivers the keynote address at Macworld on Jan. 7, 2003, in San Francisco. Jobs announced new 17-inch and 12-inch powerbooks as well as several new software updates. On the right, a noticeably thinner Jobs introduces the new Apple iPhone 3G at the Apple Worldwide Developers Conference in San Francisco on Monday, June 9, 2008. Investor concern over Jobs' health was one likely cause of a recent downtick in the company's stock value, though the company denies Jobs is sick. Jobs learned of a rare but treatable form of pancreatic cancer in October 2003, but did not make the diagnosis public for nine months. (Getty Images/AP Photo)