Comptometer - Biography of a Machine
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|Brooke W. Boering|
|A site on the early development of the business calculator around the turn of the twentieth century in America. Learn about the various models of comptometers, their features, and how to identify them; Dorr Eugene Felt, their inventor, and the company he created to make them; the Comptometer schools that Felt set up to train operators and place them in jobs; and the competitors and their machines, the business battles, and the deals.|
|Resource Types:||Calculators, Recreations|
|Math Topics:||Arithmetic/Early Math, History and Biography|
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