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. This manually operated, non-printing ...

In 1867, Frederick A. P. Barnard, a mathematician and the president of Columbia University in New York, served as a judge at the Exposition universelle, a world’s fair held in Paris. There he saw a ...

A DISPLAY of calculating machines was arranged early this month by the Burroughs Adding Machine, Ltd.,at 136 Regent Street, London, W.I. The machines shown were of many types, ranging from the simpler ...

While working as a bank clerk, William Seward Burroughs saw a need for an improved calculator, so he invented one, and was issued four patents for the first successful “calculating machine” on August ...

Frustrated by human error, mathematician and inventor Charles Babbage designed a machine to perform mathematical functions and automatically print the results. Library of Congress When today’s number ...