CommonLoops
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].