New Delhi, April 21 -- Apple CEO Tim Cook is stepping down from the job that he inherited from the late Steve Jobs, ending a 15-year reign that saw the company's market value soar by more than $3.6 trillion during an iPhone-fueled era of prosperity.

Cook, 65, will turn the CEO duties over to Apple's head of hardware engineering, John Ternus, on Sept. 1 while remaining involved with the Cupertino, California, company as executive chairman. That's similar to the transitions made by Amazon's Jeff Bezos and Netflix's Reed Hastings after they ended their highly successful tenures as CEO.

To allow Cook to assume his new job, Arthur Levinson will relinquish his role as Apple's non-executive chairman while remaining on its board of directors. ...