In May 1855, the difference engine of Georg and Edvard Scheutz debuts at the Paris World’s Fair. Image: “Scheutz Difference Engine, 1855.” _The Illustrated London News_. 30 June 1855. In the public domain.

Articles

Roger Whitson, “The Difference Engine: 1832, 1855, 1876, 1991, 2002, 2008″