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Major Modes for Lisp

Emacs has four different major modes for Lisp. They are the same in terms of editing commands, but differ in the commands for executing Lisp expressions.

Emacs-Lisp mode
The mode for editing source files of programs to run in Emacs Lisp. This mode defines C-M-x to evaluate the current defun. See section Libraries of Lisp Code for Emacs.
Lisp Interaction mode
The mode for an interactive session with Emacs Lisp. It defines LFD to evaluate the sexp before point and insert its value in the buffer. See section Lisp Interaction Buffers.
Lisp mode
The mode for editing source files of programs that run in other dialects of Lisp than Emacs Lisp. This mode defines C-M-x to send the current defun to an inferior Lisp process. See section Running an External Lisp.
Inferior Lisp mode
The mode for an interactive session with an inferior Lisp process. This mode combines the special features of Lisp mode and Shell mode (see section Shell Mode).
Scheme mode
Like Lisp mode but for Scheme programs.
Inferior Scheme mode
The mode for an interactive session with an inferior Scheme process.

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