Apple CEO Steve Jobs has taken another medical leave of absence.
Apple has announced that its Chief Executive Officer, Steve Jobs, is taking another medical leave of absence, his second of the past two years.
The announcement has raised major questions about Jobs' health, and about the leadership of Apple, the company he pushed into the forefront of the personal computing revolution.
The company did not say how long the 55-year-old CEO would be on leave, and did not provide any further information on Jobs' health.
He underwent a liver transplant in 2009 after an announced a leave of six months.
In a brief note to Apple employees, Jobs said he will continue as CEO and will be involved in major decisions.
Apple's Chief Operating Officer, Tim Cook, will take over all the company's day to day operations.
Cook ran apple during Jobs' absence in 2009, and in 2004 when Jobs had pancreatic surgery.
Jobs has been Apple's driving creative force and public face.
Under his leadership Apple launched products ranging from the Mac computer in 1984 to the iPod, iPhone and iPad.