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SAN FRANCISCO If the past is any indication, Tim Cook's mastery of inventory management and his high expectations of employees should leave Apple Inc. in good hands while its charismatic leader, Steve Jobs, takes a medical leave of absence.

Apple said Monday that Cook, the chief operating officer, will take charge of the iPhone and iPad maker as Jobs focuses on his health. Unlike Jobs' half-year medical leave in 2009, during which he specified he'd return to work at the end of June and stuck to it, Apple did not say when, if ever, Jobs would return as CEO. That means Cook, 50, considered a logical eventual successor to Jobs, 55, could be in charge for a long time, perhaps permanently.More must-see stories  AFP - Getty Images The stars in Motown Slideshow: Fuel-efficient electric cars, upscale sedans and trucks make their debuts at the 2011 North American International Auto show.

Your Career: The family medical leave debate Slideshow: Fuel-efficient electric cars, upscale sedans and trucks make their debuts at the 2011 North American International Auto show. Slideshow: Fuel-efficient electric cars, upscale sedans and trucks make their debuts at the 2011 North American International Auto show.Your stories  AFP - Getty Images 200 stars in Motown Slideshow: Fuel-efficient electric cars, upscale sedans and trucks make their debuts at the 2011 North American International Auto show.Your Career: The family medical leave debate Slideshow: Fuel-efficient electric cars, upscale sedans and trucks make their debuts at the 2011 North American International Auto show. Slideshow: Fuel-efficient electric cars, upscale sedans and trucks make their debuts at the 2011 North American International Auto show.Your