Computer Inventions

  • 2500 BCE

    Abacus

    A tool used for calculating numbers
  • Stepp Reckoner/Leibniz wheel

    Gear operated wheel mechanical calculator
    Gottfried Leibniz
  • Difference Engine

    Mechanical computer whose function was based off polynomials - commonly used in engineering and navigation.
  • Analytical Engine

    the first real computer. Fully program controlled Automatic and digital computer.
    Charles Babbage
  • Tubulating Machine

    Machine designed to summarize data stored on punch cards. This aided in quickly completing the 1890 census.
    Herman Hollerith

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