MODUlar LAnguage (language) (Modula) Wirth's 1977 predecessor of Modula-2. The original Modula was, more oriented toward concurrent programming, but otherwise quite similar.
["Modula - A Language for Modular Multiprogramming", N. Wirth, Soft Prac & Exp 7(1):3-35, Jan 1977]. Last updated: 1999-07-12