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

Michigan Algorithm Decoder

    (MAD) An early programming language, based on
   IAL, developed at the University of Michigan by R. Graham,
   Bruce Arden, and Bernard Galler in 1959.  MAD was one of the
   first extensible languages: the user could define his own
   operators and data types.

   MAD ran on the IBM 704, IBM 709 and IBM 7090.  It was
   ported to the IBM 7040 at the City College of New York by
   Robert Teitel and also to Philco, Univac and CDC
   computers.

   Mad/1 was a later version.

   ["Michigan Algorithm Decoder (The MAD Manual)", U Michigan
   Computing Center, 1966].

   [Sammet 1969, p. 205].

   (2005-02-09)