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Reference.org
Harvard Mark II
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<p>The Harvard Mark II, also known as the Aiken Relay Calculator, was an <a href="/facts/Electromechanical_computer/4TvyCu8c">electromechanical computer</a> built under the direction of <a href="/facts/Howard_Aiken/EXT7VMAC">Howard Aiken</a> at <a href="/facts/Harvard_University/Lhy9L1cx">Harvard University</a>, completed in 1947. It was financed by the <a href="/facts/United_States_Navy/xYK0fUou">United States Navy</a> and used for ballistic calculations at <a href="/facts/Naval_Surface_Warfare_Center_Dahlgren_Division/S4aGTWA7">Naval Proving Ground Dahlgren</a>. Computer pioneers <a href="/facts/Edmund_Berkeley/xAxK7mL5">Edmund Berkeley</a> and <a href="/facts/Grace_Hopper/MEhbGazn">Grace Hopper</a> worked together under Aiken to build and program the Mark II </p>