From: zak.wilson@...
Date: 2005-07-26T10:10:59+09:00
Subject: Re: Lisp on Lines

Common Lisp is an open standard. There are implementations of it that
are proprietary, and implementations that are open source. Clisp, CMUCL
and SBCL are popular open source implementations; Allegro CL and
LispWorks are popular proprietary implementations, and a number of
others exist. Problems arise where the standard isn't quite specific
enough, but these are usually fairly trivial; Common Lisp offers reader
macros to conditionally read code depending on which implementation is
in use.