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Comptometer
noun
Definitions
Noun
- 1 A mechanical or electromechanical calculator; an adding machine without a crank, driven instead by keypress.
"Another was able to add up correctly the most complicated lists of figures in less time than a comptometer."
Etymology
Genericized trademark of Felt and Tarrant Manufacturing Company, apparently a blend of compute and meter (“measure”).
See also for "comptometer"
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