Emacs Lisp

As you might have guessed, Emacs Lisp is a Lisp dialect that’s used as a scripting language for Emacs, a text editor. In a sense, Emacs Lisp is close to Maclisp and even shows some influence from Common Lisp, which is why it’s used to customize and extend Emacs. 

Emacs Lisp is a dialect of the Lisp programming language used as a scripting language by Emacs (a text editor family most commonly associated with GNU Emacs and XEmacs). It is used for implementing most of the editing functionality built into Emacs, the remainder being written in C, as is the Lisp interpreter.