Calculator History

Timeline created by jalger5075
  • Multiplying Bones

    Multiplying Bones
    "Napier's bones" invented by John Napier for multiplication, based on the ancient numerical scheme known as the Arabian lattice.
  • Period: to

    Calculator Timespan

    The History of Calculators
  • Calculating Clock

    Calculating Clock
    Willhelm Schickard invented the "Calculating Clock", the first mechanical calculator. It used a version of Napier's bones for multiplication with a mechanical adding/subtracting calculator based on gears, with mutilated gears for carry.
  • Pascaline

    Blaise Pascal started to develop a mechanical calculator - the Pascaline. Capable of addition, subtraction was performed by nines-complement addition, and multiplication was performed by repeated additions and subtractions. It had shortcomings and failed to sell.
  • Stepped Reckoner

    Stepped Reckoner
    Gottfried Leibniz developed the Stepped Reckoner using stepped gear wheels. Performed the 4 functions, but worked off and on due to an error in the carry mechanism, none sold.
  • Arithmometer

    Charles Xavier Thomas's Arithmometer.
  • Scheutz Difference Engine

    Scheutz Difference Engine
    The Scheutz Difference Engine completed: the world's first printing calculator.
  • Pinwheel Calculator

    Pinwheel Calculator
    W.T. Odhner in Sweden independently develops the pin-wheel calculator. Since then, many calculating machines have used the same principle.
  • Madas 20BZS

    Madas 20BZS , a typical electrically driven, stepped-gear calculator with automatic multiplication and division.
  • Anita Mk 8

    Anita Mk 8
    the Anita Mk 8 for all markets but the continental European market. These models used cold-cathode vacuum tubes and numerical display ("Nixie" type) tubes.
  • Hewlet-Packard HP35

    Hewlet-Packard HP35
    First scientific pocket calculator introduced was the Hewlet-Packard HP35 .
  • Sharp PC1211 / Tandy TRS80 PC-1

    Sharp PC1211 / Tandy TRS80 PC-1
    The Sharp PC1211 / Tandy TRS80 PC-1 is the first hand-held computer; it has a QWERTY keypad and runs the BASIC language.