Carbon.

[skip at pobox.com]

    Rodney> I've just starting using Emacs.app for OS X....  if anyone is
    Rodney> interested, it can be found at http://emacs-app.sourceforge.net/

Yikes!  How many different Mac OS X ports of various flavors of Emacs are
available?  It seems there are two Carbon-based ports based on the guy
(what's his name? Choi?) who has disappeared (one GNU Emacs, one XEmacs).
There is Aquamacs.  There's Emacs.app.  Am I missing anything?  Why the
explosion in Mac ports?

Skip