Paul Graham is an English computer programmer, essayist, and venture capitalist, born in 1964. He is a co-founder of Viaweb, which later became Yahoo Store. His writing includes essays on the programming language Lisp, being a nerd in high school, and the hypothetical programming language Blub. He has published three books, including a collection of essays titled Hackers And Painters. He is one of the creators of the startup incubator Y Combinator and the social news site Hacker News. He has a PhD in Computer Science from Harvard, and studied painting in Italy. He is married to Jessica Livingston.