A calculating machine designed and built by Gottfried Wilhelm Leibniz (1646-1716) which worked partly according to modern mathematical methods. Photo after a contemporary design drawing Stock Photo - Alamy
Ficheiro:Leibniz Stepped Reckoner.png – Wikipédia, a enciclopédia livre
Image of Calculating Machines, 17th Century Leibniz calculating machine, 1694
01) The first mechanical calculator for all four arithmetic operations by Gottfried Wilhelm Leibniz
Leibniz calculating machine - YouTube
Win Win Computer - NAPIER BONEA Leibniz wheel or step drum is a cylinder consist of a set of increment lengths when connecting to a counting wheel, which can be used in