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.
["Michigan Algorithm Decoder (The MAD Manual)", U Michigan Computing Center, 1966].
[Sammet 1969, p. 205].