““The American Works Progress (later Projects) Administration, founded in 1935 to provide jobs for “employable workers” during the Great Depression, established the Mathematical Tables Project in 1938 as one of its “small useful projects.” Useful it was, but hardly small: it was one of the largest-scale computing operations in the pre-ENIAC age, headed by a Polish-born mathematician, Gertrude Blanch, who supervised 450 clerks.18 Just as de Prony had learned a lesson from Adam Smith, Blanch took her cue from Henry Ford—she gave each group of workers a single task: some did only addition, some only subtraction. The best were trusted with long division. The resulting tables of logarithms and other functions were published in twenty-eight volumes; in some of them, no one to this day has discovered a single error.””
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