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Search "Comptometer"
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Comptometer: An accounting comptometer with ten positions |
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Comptometer | |
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About 2 pages (639 words) in 2 products |
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Encyclopedia and Summary Information
summary from source:
 Felt's Comptometer Summary
343 words, approx. 1 pages The Felt's comptometer was the first calculator constructed that allowed operands to be entered by pressing keys rather than requiring the operator of previous calculators to turn a series of dials to input the operand values. (Operands are number... summary from source:
 Comptometer Information
296 words, approx. 1 pages
A Comptometer is a type of mechanical (or electro-mechanical) adding machine. The comptometer was the first adding device to be driven solely by the action of pressing keys, which are arranged in an array of vertical and horizontal columns.... 
summary from source:
 The Boston Globe Rhea M. Robbins, 91 Longtime comptometer operator
07/06/1994: 134 words, approx. 1 pages Rhea Marie Robbins of Cambridge, a retired comptometer operator, died Saturday at the Newfield House Nursing Home in Plymouth. She was 91. Born and educated in Woonsocket, R.I., she lived in Cambridge until four months ago, when she moved to Plymouth. Mrs....
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Comptometer | |
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About 2 pages (639 words) in 2 products |
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