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comptometer    
n. 高速度计算机之一种,其商标名

高速度计算机之一种,其商标名


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英文字典中文字典相关资料:


  • Comptometer - Wikipedia
    The Comptometer was the first commercially successful key-driven mechanical calculator, patented in the United States by Dorr Felt in 1887
  • Comptometer Explained – Everything You Need To Know
    What is the comptometer? The comptometer was the first commercially successful key-driven mechanical calculator How does a comptometer work? The computation is carried out by pressing keys The comptometer’s keyboard is comprised of columns each presenting a place or power of ten The lever inside the machine pulls the keys up and down when
  • Definition of Comptometer - PCMag
    A mechanical calculator that was made from 1887 to the mid-1970s The Comptometer was the first push button calculator and also the first calculator to achieve commercial success
  • Comptometers - Computing History
    A Comptometer is a mechanical (or electro-mechanical) adding machine It was the first adding device to be operated solely by the action of pressing keys arranged vertically and horizontally Although primarily designed for adding, division, multiplication and subtraction could also be performed
  • How the Comptometer Works - YouTube
    A visual explanation of how the Comptometer, the first practical key-driven calculator, works Comptometers were manufactured continuously from 1887 until
  • What does comptometer mean? - Definitions. net
    Comptometer The comptometer was the first commercially successful key-driven mechanical calculator, patented in the USA by Dorr E Felt in 1887
  • Comptometer, Pronounced Like Thermometer | Cooper Hewitt, Smithsonian . . .
    The comptometer itself represents a fundamental question of design: who is the object for? The core goal — be it doing arithmetic, messaging another person, listening to music or anything else — can be achieved through any number of different interfaces depending on the intended audience
  • Comptometer Explained – Everything You Need To Know
    The comptometer was the first commercially successful key-driven mechanical calculator and a revolutionary device that transformed bookkeeping, accounting and many other business processes for nearly a century
  • Comptometer, key-driven mechanical calculator - isolalab. com
    The comptometer was the first commercially successful key-driven mechanical calculator, patented in the United States by Dorr E Felt in 1887
  • History of Mechanical Calculators - Part III - X-Number
    The "Macaroni Box" and Dorr Felt’s Comptometer In 1885, Dorr Eugene Felt (1862-1930), of Chicago, used a wooden macaroni box, staples, rubber bands, wire, string, and meat skewers to make a prototype of what became the first practical multiple order calculator to use a keyboard, the Comptometer





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