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  2. Mechanical calculator - Wikipedia

    en.wikipedia.org/wiki/Mechanical_calculator

    Electric motors were used on some mechanical calculators from 1901. [10] In 1961, a comptometer type machine, the Anita Mk VII from Sumlock comptometer Ltd., became the first desktop mechanical calculator to receive an all-electronic calculator engine, creating the link in between these two industries and marking the beginning of its decline ...

  3. Pascaline - Wikipedia

    en.wikipedia.org/wiki/Pascal's_calculator

    Pascaline (also known as the arithmetic machine or Pascal's calculator) is a mechanical calculator invented by Blaise Pascal in 1642. Pascal was led to develop a calculator by the laborious arithmetical calculations required by his father's work as the supervisor of taxes in Rouen . [ 2 ]

  4. Stepped reckoner - Wikipedia

    en.wikipedia.org/wiki/Stepped_reckoner

    It was the first calculator that could perform all four basic arithmetic operations. [3] Its intricate precision gearwork, however, was somewhat beyond the fabrication technology of the time; mechanical problems, in addition to a design flaw in the carry mechanism, prevented the machines from working reliably. [4] [5]

  5. Comptometer - Wikipedia

    en.wikipedia.org/wiki/Comptometer

    The mechanical versions were made faster and more reliable, then a line of electro-mechanical models was added in the 1930s. It was the first mechanical calculator to receive an all-electronic calculator engine in 1961, with the ANITA Mark VII model released by Sumlock Comptometer. This created the link between the mechanical calculator ...

  6. Arithmometer - Wikipedia

    en.wikipedia.org/wiki/Arithmometer

    The arithmometer (French: arithmomètre) was the first digital mechanical calculator strong and reliable enough to be used daily in an office environment. This calculator could add and subtract two numbers directly and perform long multiplications and divisions effectively by using a movable accumulator for the result.

  7. The Millionaire (calculator) - Wikipedia

    en.wikipedia.org/wiki/The_Millionaire_(calculator)

    The Millionaire was the first commercially successful mechanical calculator that could perform a direct multiplication. It was in production from 1893 to 1935 with a total of about five thousand machines manufactured.

  8. Odhner Arithmometer - Wikipedia

    en.wikipedia.org/wiki/Odhner_Arithmometer

    Odhner developed the first version of his mechanical calculator in 1873. In 1876, he agreed to build 14 machines for Ludvig Nobel, his employer at the time, which he delivered in 1877. He patented his original machine in several countries in 1878–1879 and an improved version of it in 1890.

  9. Leibniz wheel - Wikipedia

    en.wikipedia.org/wiki/Leibniz_wheel

    Considered by many to be the first largely successful mechanical calculator, and the first to be produced in large numbers (thousands) – Gottfried Leibniz built his first stepped reckoner in 1694 and another one in 1706. [3] – Philipp Matthäus Hahn, a German pastor, built two circular machines in 1770. [4] [5]