CLOS

from The Free On-line Dictionary of Computing (8 July 2008)

Common LISP Object System
CLOS

   <language> (CLOS) An {object-oriented} extension to {Common
   LISP}, based on {generic functions}, {multiple inheritance},
   {declarative method combination} and a {meta-object protocol}.
   A descendant of {CommonLoops} and based on {Symbolics}
   {FLAVORS} and {Xerox} {LOOPS}, among others.

   See also {PCL}.

   ["Common LISP Object System Specification X3J13 Document
   88-002R", D.G.  Bobrow et al, SIGPLAN Notices 23, Sep 1988].

   (1994-11-30)