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IBM SPEAKERS BUREAU SLIDE SHOW

Slide 32
Thomas Machine

Courtesy: IBM Corporation

It was 1820 before the machine that changed the course of
calculating came to view. While serving his term in the french army, Charles Xavier Thomas de Colmar had the idea of building a calculating machine. His prototype was introduced in 1820 and 25 years later an extremely lucrative calculator business was underway.

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2006 San Diego Computer Museum
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