xpop

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

XPOP

   <language> An extensible {macro assembly} language with
   user-redefinable {grammar}, for use with {FAP}.

   ["XPOP: A Meta-language Without Metaphysics", M.I. Halpern,
   Proc FJCC 25:57-68, AFIPS (Fall 1964)].

   (1995-04-28)