National 3000 automatic bookkeeping calculating machine no 101364 42-BT, by National Cash Register Company Limited, England, 1935-1945. This machine was formerly the property of Dr. L J Comrie FRS.

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 ...

Christie's will sell an example of the first calculating machine in history, developed by Blaise Pascal in 1642, at an upcoming auction in Paris. A press release from the auction house called the ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. This lever-set, manual non-printing ...

This bound volume contains typescript minutes of directors' meetings of the Marchant Calculating Machine Company. For a general introduction to the Marchant ...