• Jan 1, 1200


    The worlds first computer using sliding beads.
  • 1st Mechanical Calculator

    1st Mechanical Calculator
    By Blaise Pascal. Clerks and accountants feared for their jobs!
  • Arithmometer

    The first commercially successful calculator by Charles Xavier Thomas.
  • The Analytical Engine

    The Analytical Engine
    First computer to have an input, processing, and output by Charles Babbage also known as the "Father of Computers."
  • Herman Hollerith

    Herman Hollerith
    He founded IBM.
  • Atanasoff-Berry Computer

    Atanasoff-Berry Computer
    First electronaical digital computer.
  • 1st Generation Computers

    1st Generation Computers
    They used vaccum tubes, they were huge, unreliable, and produced so much heat that air conditioner was required.
  • 2nd Generation Computers

    2nd Generation Computers
    They used transistors, needed less power to turn on, gave off less heat, had more memory spcae, faster, realiable, and had an English-like language.
  • 3rd Generation Computer

    3rd Generation Computer
    They used silicon chips and integrated circuits, faster, smaller, more reliable, and the software industry emerged.
  • 4th Generation Computer

    4th Generation Computer
    They used microprocessors, had even smaller circuitry, user friendly, and application software packages that were readily avaible. They were microcomputers.