computers

  • 2600 B.C.

    2600 B.C.

    counting frame
  • 1617

    1617

    John Napier introduced a system called "Napiers Bones," made from horn, bone or ivory the device allowed the capability of multiplying by adding numbers and dividing by subtracting.
    John Napier dies
  • coculator

    coculator

    mechanical coculator

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