life before and after pc

By facebooker_1000366288
  • Period: to

    siglo

  • 1ft model

    1ft model
    Early model calculations performed by rotating shafts and gears.

  • 2

    2
    By December 1943 the Colossus, incorporating 1,500 valves or vacuum tubes, was already operational. It was used by the team led by Alan Turing to decode radio messages

  • 3

    3
    The integrated circuit allowed a further reduction in price, size and error rates. The microprocessor became a reality in the mid-1970s