The Science Museum in London, the CNAM in Paris, the Deutches Museum in Munich, and the Arithmeum in Bonn have extensive collections of calculating machines. Further collections are at the Heinz ...
Invented by Leonardo Torres in 1920, the Torres calculating machine is a machine that solves essential addition, subtraction, multiplication, and division problems using a simple manner. It was a ...
IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. In 1893 the Swiss engineer Otto ...
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