Apple Inc.'s chief executive officer (CEO) Steve Jobs, who is on a medical leave, took the stage at an event in San Francisco on Wednesday, quelling the speculations about his health.
Apple is expected to unveil a second generation of its popular iPad tablet computer at the event.
Jobs, 56, announced in January that he will take an indefinite medical leave, raising new concerns about the company's future.
Jobs disclosed in August 2004 that he had been treated for a rare form of pancreatic cancer, saying the tumor was diagnosed in time and he had undergone surgery to remove it.
In the following years, the thin, almost gaunt appearance of Jobs constantly inspired speculations about his health.
In early January 2009, Jobs said his apparent weight loss is caused by a treatable hormone imbalance. But about a week later, he admitted that the issue was more complex than he had thought and then took a medical leave for nearly six months.
In June 2009, Methodist University Hospital Transplant Institute in the U.S. state of Tennessee confirmed that Jobs received a liver transplant at the institute.
