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

MODUlar LAnguage
Modula

    (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)