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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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  • Comptometer - Wikipedia
    The comptometer is the direct descendant of the key-driven machine of Thomas Hill [1] patented in the United States in 1857 and of the Pascaline invented by Blaise Pascal in France in 1642 By just replacing the input wheels of the Pascaline by the columns of keys of Hill's machine, the comptometer was invented
  • Comptometer Explained – Everything You Need To Know
    The comptometer was the first commercially successful key-driven mechanical calculator It was invented in 1862
  • comptometer - Maple Ridge Museum
    How to work a Comptometer Comptometers were primarily for addition, but they could also do subtraction, multiplication and division Occasionally, special models were produced to calculate currency exchanges, times and imperial weights, which created a learning curve for the user as they were required to adapt to the new keys and calculations
  • Comptometer - Vintage Calculators
    The Comptometer was the first successful key driven adding and calculating machine "Key driven" means that just pressing the keys adds the numbers entered to the total - no other action is required - so it is very quick for adding long lists of numbers
  • Definition of Comptometer | PCMag
    The Comptometer was the first push button calculator and also the first calculator to achieve commercial success It could perform addition, subtraction, multiplication and division
  • 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 the 1970s
  • 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
  • Comptometer - Jaaps Mechanical Calculators Page
    The table below lists all the Comptometer models, with their most prominent characteristics Some models (such as B and C, or H and J) are very hard to distinguish except by serial number
  • 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
    The comptometer is the direct descendant of the key-driven machine of Thomas Hill patented in the United States in 1857 and of the Pascaline invented by Blaise Pascal in France in 1642





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