Computer girl hours

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Hopper was sent to the Bureau of Ordinance Computation Project at Harvard University under the guidance of Howard Aiken. The Harvard physics and applied mathematics professor helped create the first Automatic Sequence Controlled Calculator (ASCC), better known as Mark I. He ran a lab where design, testing, modification and analysis of weapons were calculated. Most were specially trained women called computers. “So the first ‘computers’ were women who did the calculating on desk calculators” Williams said. And the time it took for the computers to calculate was called “girl hours.”