Source : Free On-Line Dictionary of Computing

MODUlar 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].
     
        (1999-07-12)