The Free On-line Dictionary of Computing (30 December 2018):

MACSYMA

   Project MAC's SYmbolic MAnipulator.  The first comprehensive
   symbolic mathematics system, written in Lisp by Joel Moses
    of MIT in 1969, later Symbolics,
   Inc.

   Versions include Symbolics Macsyma, DOE Maxima (ANL, in
   Common LISP) and Vaxima.

   (ftp://rascal.ics.utexas.edu/pub/maxima-4-155.tar.Z).
   E-mail: .

   ["MACSYMA - The Fifth Year", J. Moses, SIGSAM Bulletin 8(3)
   (Aug 1974)].

   (1994-11-01)