(xemacs.info)Lisp Modes

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22.2 Major Modes for Lisp
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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.  Note:
     Lisp Libraries.

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.  Note: Lisp Interaction.

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.  Note:
     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
     (Note: 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.