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comptometer

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斎藤和英大辞典

日外アソシエーツ株式会社

comptometer

計数器

Wiktionary英語版

出典：Wiktionary

comptometer

出典:『Wiktionary』 (2024/08/07 10:44 UTC 版)

語源

Trade name of Felt and Tarrant Manufacturing Company, apparently a blend of compute and meter (“measure”).

名詞

comptometer (plural comptometers)

  1. A mechanical or electromechanical calculator; an adding machine without a crank, driven instead by keypress.

派生語

  • comptometrist

ウィキペディア英語版

出典：Wikipedia

Comptometer

出典:『Wikipedia』 (2011/06/04 13:08 UTC 版)

英語による解説

ウィキペディア英語版からの引用
引用

Patented in the USA by Dorr E. Felt in 1887, the comptometer was the first commercially successful key-driven mechanical calculator. A key-driven calculator is extremely fast because each key adds or subtracts its value to the accumulator as soon as it is pressed and a skilled operator can enter all of the digits of a number simultaneously, using as many fingers as required, making them sometimes faster to use than electronic calculators. Consequently, in specialized applications, comptometers remained in use in limited numbers into the early 1990s, but with the exception of museum pieces, they have all now been superseded by electronic calculators and computers.

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