In 2001, Paul Graham announced that he was working on a new [[Dialect (computing)|dialect]] of Lisp named ''Arc''. Over the years since, he has written several essays describing features or goals of the language, and some internal projects at Graham's [[Startup company|startup]][[business incubator]] named [[Y Combinator]] have been written in Arc, most notably the [[Hacker News]] web forum and news aggregator program. Arc is written in [[Racket (programming language)|Racket]].<ref>{{cite web |url=http://arclanguage.org/install |title=Arc Forum: install |website=Arclanguage.org |access-date=2018-11-07}}</ref>
