Stephen Russell (born 1937),[1] also nicknamed "Slug",[1] is an American computer scientist most famous for creating Spacewar!, well known for being the first widely distributed video game.
Russell wrote the first two implementations of the programming language Lisp for the IBM 704 mainframe computer. It was Russell who realized that the concept of universal functions could be applied to the language. By implementing the Lisp universal evaluator in a lower-level language, it became possible to create the Lisp interpreter; prior development work on the language had focused on compiling the language.[2] He invented the continuation to solve a double recursion problem for one of the users of his Lisp implementation.[3]