How the Comptometer Works
6:48
YouTubeMechanicalComputing
How the Comptometer Works
A visual explanation of how the Comptometer, the first practical key-driven calculator, works. Comptometers were manufactured continuously from 1887 until the 1970s. The specific details described in this video are for a Model F Comptometer, built around 1915.
35.8K viewsJan 30, 2012
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