LISP is the original language of artificial intelligence, and is the second-oldest programming language still in use (after Fortran).
The Scheme variant of Lisp has many features familiar to programmers in other languages, such as lexical scoping, duck typing, and interactive programming, as well as advanced features such as tail recursion, first-class procedures, and dynamic code generation.
Lamb Lisp additionally adds many features to support real-time embedded control applications.