74 Evolution of Emacs Lisp STEFAN MONNIER, Université de Montréal, Canada MICHAEL SPERBER, Active Group GmbH, Germany Shepherd: Brent Hailpern, IBM Research, USA While Emacs proponents largely agree that it is the world’s greatest text editor, it is almost as much a Lisp machine disguised as an editor. Indeed, one of its chief appeals is that it is programmable via its own programming language. Em