A mechanical calculator invented by Wilhelm Schickard.

See (1) for a Java simulator.

Notes

1. Benjamin Nill, "Java 3D-Simulation of the Schickard Calculator from 1623," http://www.gris.uni-tuebingen.de/projects/studproj/schickard/index.html, (University of Tübingen,1999, accessed Sept. 7, 2004). Link from Sanket S. Dalal, 2004 Sep 7.