Programmer, essayist and investor who co-founded Y Combinator with Jessica Livingston, Robert Morris and Trevor Blackwell. Previously co-founded Viaweb, acquired by Yahoo in 1998. Writes extensively about startups, entrepreneurship and programming at paulgraham.com; author of Hackers & Painters and books on Lisp, and creator of the Bel programming language. Holds a Harvard PhD in computer science.
