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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 ]

  3. Pinwheel calculator - Wikipedia

    en.wikipedia.org/wiki/Pinwheel_calculator

    In St. Petersburg, Russia, Wilgott Theophil Odhner invented his arithmometer in 1874 and in 1890 [7] it became the first pinwheel calculator to be mass-manufactured. Its industrial production started in Odhner's workshop: W.T. Odhner, Maschinenfabrik & Metallgiesserei and then moved to the Odhner-Gill factory (фабрика Однера ...

  4. Arithmometer - Wikipedia

    en.wikipedia.org/wiki/Arithmometer

    Its production debut of 1851 [2] launched the mechanical calculator industry [4] which ultimately built millions of machines well into the 1970s. For forty years, from 1851 to 1890, [7] the arithmometer was the only type of mechanical calculator in commercial production, and it was sold all over the world. During the later part of that period ...

  5. Mechanical calculator - Wikipedia

    en.wikipedia.org/wiki/Mechanical_calculator

    For forty years the arithmometer was the only type of mechanical calculator available for sale until the industrial production of the more successful Odhner Arithmometer in 1890. [ 8 ] The comptometer , introduced in 1887, was the first machine to use a keyboard that consisted of columns of nine keys (from 1 to 9) for each digit.

  6. Adding machine - Wikipedia

    en.wikipedia.org/wiki/Adding_machine

    A manual adding machine manufactured in the 1950s. Subtraction was impossible, except by adding the complement of a number (for instance, subtract 2.50 by adding 9,997.50). Multiplication was a simple process of keying in the numbers one or more columns to the left and repeating the "addition" process.

  7. Vegan vs. vegetarian vs. omnivore: Does diet type have a big ...

    www.aol.com/vegan-vs-vegetarian-vs-omnivore...

    When comparing vegan, vegetarian, and omnivore diet types, researchers found that food quality and diversity may have the biggest impact on the health and structure of the gut microbiome.

  8. Tom Hardy Offers to Pay Over $300,000 of Crew’s Wages ... - AOL

    www.aol.com/tom-hardy-offers-pay-over-143932689.html

    Heroes don’t always wear capes — sometimes they’re covered in venom … at least if you’re Tom Hardy.. The actor, 47, reportedly offered to pay £250,000 — or approximately $315,000 ...

  9. Analytical engine - Wikipedia

    en.wikipedia.org/wiki/Analytical_Engine

    [2] [3] It was first described in 1837 as the successor to Babbage's Difference Engine, which was a design for a simpler mechanical calculator. [ 4 ] The analytical engine incorporated an arithmetic logic unit , control flow in the form of conditional branching and loops , and integrated memory , making it the first design for a general-purpose ...

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