Complex sentence: William Charles Norris (July 14,1911 near Red Cloud, Nebraska--August 21,2006) was the pioneering CEO of Control Data Corporation, at one time one of the most powerful and respected computer companies in the world.
Split into simpler sentences: William Charles Norris (July 14,1911 near Red Cloud, Nebraska--August 21,2006) was an American business executive. He was the CEO of Control Data Corporation, at one time one of the most powerful and respected computer companies in the world.