Number 47: Calculated giftsAfter amassing a fortune as a cofounder of Texas Instruments, with its ubiquitous calculators, Cecil H. Green made major gifts to institutions of higher education and medicine. Green, who earned two degrees from MIT in the 1920s, gave handsomely to his alma mater. At the time of his death in 2003, MIT said, Green and his wife, Ida, had given the equivalent of $91 million in current US dollars. (The tallest MIT building is named for the Greens.) One of his priorities was educating women; he funded a womens graduate residence hall and fellowships for women in science and engineering.