Garry Tan / http://garry.posterous.com
Paul Graham is a partner at Y Combinator.
He is also the author of On Lisp (1993), ANSI Common Lisp (1995), and Hackers & Painters (2004). In 1995, he and Robert Morris started Viaweb, the first ASP, which in 1998 became Yahoo! Store. In 2002 he discovered a simple spam filtering algorithm that inspired the current generation of filters.
Graham has a B.A. from Cornell. He earned an M.S. and a Ph.D. in Applied Sciences (specializing in computer science) from Harvard, and studied painting at Rhode Island School of Design and the Accademia di Belle Arti in Florence.