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  2. Pascal's calculator - Wikipedia

    en.wikipedia.org/wiki/Pascal's_calculator

    Pascal's calculator (also known as the arithmetic machine or Pascaline) 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] He designed the machine to add and subtract two numbers ...

  3. Mechanical calculator - Wikipedia

    en.wikipedia.org/wiki/Mechanical_calculator

    This picture shows clockwise from top left: An Arithmometer, a Comptometer, a Dalton adding machine, a Sundstrand, and an Odhner Arithmometer. A mechanical calculator, or calculating machine, is a mechanical device used to perform the basic operations of arithmetic automatically, or (historically) a simulation such as an analog computer or a ...

  4. Johnny Paycheck discography - Wikipedia

    en.wikipedia.org/wiki/Johnny_Paycheck_discography

    This is a detailed discography for American country music singer Johnny Paycheck. Paycheck initially recorded some singles under the name of Donny Young before releasing a few singles on Hilltop and then a string of albums with Little Darlin' Records in the mid-60s. In 1971, he signed with Epic Records and stayed with the label for over 10 years.

  5. Scientific calculator - Wikipedia

    en.wikipedia.org/wiki/Scientific_calculator

    A scientific calculator is an electronic calculator, either desktop or handheld, designed to perform calculations using basic ( addition, subtraction, multiplication, division) and complex ( trigonometric, hyperbolic, etc.) mathematical operations and functions. They have completely replaced slide rules as well as books of mathematical tables ...

  6. Turbo generator - Wikipedia

    en.wikipedia.org/wiki/Turbo_generator

    Turbo generator. A turbo generator is an electric generator connected to the shaft of a water turbine or steam turbine or gas turbine for the generation of electric power. [note 1] Large steam-powered turbo generators provide the majority of the world's electricity and are also used by steam-powered turbo-electric ships. [1]

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