Donald E. Knuth

http://www-cs-faculty.stanford.edu/~uno/don.gif

Home page at http://www-cs-faculty.stanford.edu/~knuth/ .

Also see Wikipedia and http://www.stanfordalumni.org/news/magazine/2006/mayjun/features/knuth.html .

Author of The Art of Computer Programming.

Creator of TeX & MetaFont.