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History of Computers

By amanda28
  • 2300 BCE

    Abacus

    Abacus
    The abacus is a percussion instrument that is used to carry out simple and more complex operations.

  • Napier tables

    Napier tables
    They were developed to perform multiplication, division, and square roots.

  • Calculating Watch

    Calculating Watch
    Wilhelm Schickard built the first mechanical calculator. This one used watch parts.

  • Pascaline

    Pascaline
    It was the first calculator that worked on wheels and gears, invented by Blaise Pascal.

  • Squaring Machine

    Squaring Machine
    Gottfired Leibniz created a machine that in addition to adding, subtracting, multiplying and dividing, could square.

  • Colossus

    Colossus
    Were the first electronic calculating devices.