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 ...

“The first digital use of the transistor for consumers was in a calculator,” says Rick Bensene, curator of the Old Calculator Web Museum. Our series on the birth of the transistor — and with it, the ...

One of the world's first calculating machines will not go to auction as scheduled in France, after a Paris court provisionally blocked the historic item from being exported. Auction house Christie's ...

This lever-set ,manually operated non-printing calculating machine has a brass mechanism and a metal case with lid. The lid and the flat plates that cover the mechanism are painted black. The carriage ...