Explore: Calculating Machines

built two circular calculating machines based on Leibniz' cylinders. J. C. Schuster, Hahn's brother-in-law, built a few machines of Hahn's design into

sophisticated electrical machines did specialized analog calculations in the early 20th century. The first digital electronic calculating machines were developed

adding machine is a class of mechanical calculator, usually specialized for bookkeeping calculations. Consequently, the earliest adding machines were often

by Poleni with the first fully functional calculating clock and four-operation machine, but these machines were almost always one of a kind. Luigi Torchi

disassembled and commented Busicom history Busicom Business Machines Busicom Corp / Nippon Calculating Machine Corp Agreement between Intel & NCM Chip Hall of Fame:

rights to make and sell calculating machines in France. By 1654 he had sold about twenty machines (only nine of those twenty machines are known to exist today)

properly when used in calculating clocks. Schickard's machine was the first of several designs of direct entry calculating machines in the 17th century

(Ellice Martin); Napier Tercentenary Exhibition (1914). "Automatic Calculating Machines by P. E. Ludgate". Modern instruments and methods of calculation :

The Marchant Calculating Machine Company was founded in 1911 by Rodney and Alfred Marchant in Oakland, California. The company built mechanical, and then

Brunsviga was a calculating machine company whose history goes back to 1892. They produced mechanical calculators, hand operated but later also electrically