Gottfried Leibniz

jointly credited, with Isaac Newton, with invention of differential Calculus.

creator of a mechanical calculator

theory of monads

http://en.wikipedia.org/wiki/Leibniz

http://www.metaweb.com/wiki/wiki.phtml?title=Leibniz

review of The Courtier and the Heretic ISBN:0393058980 about Gottfried Leibniz and Baruch De Spinoza.

his alphabet of human thought sounds a lot like John Wilkins' work

• http://www.fuchu.or.jp/~d-logic/en/uni.html
• http://etext.lib.virginia.edu/cgi-local/DHI/dhi.cgi?id=dv2-74
• http://philosophyfaculty.ucsd.edu/faculty/rutherford/Leibniz/Couturatchapters/Chap3.pdf