Here follows a simple example of an Emacs extension written in Emacs Lisp. Each library is implemented using one or more Emacs Lisp source files. Some syntax sources include Fortran, Pascal, BASIC, C, C++, Java, Lisp, and ALGOL. Clojure is not designed to be backwards compatible with other Lisp dialects. Weinreb's EINE was the first Emacs written in Lisp. Reflection is a feature of dynamic, interactive languages such as Smalltalk and Lisp. Generators Language had semantics similar to Lisp. Common Lisp is a dialect of Lisp. Python's design offers some support for functional programming in the Lisp tradition. This is the case with Lisp and OCaml. The book describes computer science concepts using Scheme, a dialect of Lisp. OOP concepts go further back but were part of LISP and Simula language science. It shares many characteristics with other members of the Lisp programming language family. CLOS has been integrated into ANSI Common Lisp. Here are examples of Common Lisp code.