Hierarchical Music Specification Language HMSL <language, music> (HMSL) A programming language for experimental music composition and performance. It is a set of {object-oriented} extensions to {Forth}. (Its near-total unintelligibility to people unfamiliar with {Forth} has led some to expand "HMSL" as "Her Majesty's Secret Language".) Phil Burk (who also later developed {pForth}), Larry Polansky, and David Rosenboom started developing HMSL in 1980 while working at the Mills College Center for Contemporary Music (http://mills.edu/LIFE/CCM/CCM.homepage.html). As of June 1998, development is ongoing. (http://softsynth.com/hmsl/). (1998-09-07)