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 ...

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 ...

German engineer and inventor Konrad Zuse is considered as the inventor of the modern computer but was frustrated in his ...

Most early calculating machines carried out multiplication as a form of repeated addition. To multiply, say, by thirteen, one set the carriage at its rightmost position, turned the operating crank ...

A French court has blocked the export and foreign purchase of a 17th century arithmetic machine invented by Blaise Pascal to help ease the laborious task of calculating taxes. The sale of an ancient ...