ISLISP (also capitalized as ISLisp) is a programming language in the LISP family standardized by the ISO. The goal of the ISO standardization effort was to define a small, core language to help bridge the gap between differing dialects of Lisp. It attempted to accomplish this goal by studying primarily Common Lisp, Eu Lisp, Le Lisp, and Scheme and standardizing only those features shared between them.