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Harvard Mark I

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Harvard Mark I

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1944 Computer History: IBM ASCC "Harvard Mark 1" world's largest electro-mechanical calculator

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New life for Mark I, world's first programmable computer

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Harvard Mark I

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Supercomputer Where It All Started - Harvard Mark 1

The IBM Automatic Sequence Controlled Calculator (ASCC), called Mark I by Harvard University’s staff, was a general purpose electromechanical computer that was used in the war effort during the last part of World War II.
  • Origins 

  • Design and construction 

  • Operation 

  • Instruction format 

  • Contribution to the Manhattan Project 

  • Aiken and IBM 

  • Successors