GNU CLISP is a GNU ANSI Common Lisp implementation with an interpreter, compiler, debugger, object system (CLOS), sockets, and foreign language interface. CLISP is written in C and Common Lisp, the code is portable to the various UNIXes and Windows as well. History CLISP was first written by Bruno Haible and Michael Stoll for the Atari. In an email with Richard Stallman, Bruno debated whether CLISP was a derivative of GNU readline. The debate was resolved when Bruno agreed to release