|Comptometer Adding Machine
Comptometer was a very popular name in the first part of the 20th century. Some comptometers came in wood cabinets. The one pictured was in a copper case, with a wooden stand. It was hand crank operated.
For excellent historical coverage of the history of the Comptometer,
see "The Biography of a Machine" included here
courtesy of Brooke W. Boering.
History of Computing
An Encyclopedia of the People and Machines that Made Computer History
Copyright © 1982-2000, Lexikon Services "History of Computing" ISBN 0-944601-78-2
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