Xerox 's object-oriented Lisp which led to CLOS .
See also Portable CommonLoops .
ftp://arisia.xerox.com/pub/pcl/September-16-92-PCL-c.tar.Z .
["CommonLoops: Merging Lisp and Object-Oriented Programming", D.G. Bobrow et al, SIGPLAN Notices 21(11):17-29 (Nov 1986)].
(1999-07-02)