Paul Graham is an essayist, programmer, and programming language designer. In 1995 he developed with Robert Morris the first web-based application, Viaweb, which was acquired by Yahoo in 1998. In 2002 he described a simple statistical spam filter that inspired most current filters. He's currently working on a new programming language called Arc, a new book on startups, and is one of the partners in Y Combinator. Paul is the author of On Lisp (Prentice Hall, 1993), ANSI Common Lisp (Prentice Hall, 1995), and Hackers & Painters (O'Reilly, 2004). He has an AB from Cornell and a PhD in Computer Science from Harvard, and studied painting at RISD and the Accademia di Belle Arti in Florence. Paulgraham.com got 10 million page views in 2007. Photo by Dave Thomas, released under the Attribution Creative Commons license. Click for full-size version.