DuckCorp Dico

Found one definition

1.                 From The Free On-line Dictionary of Computing (19 January 2023):
                   
   
   
                   
                     
   SIMPL
      Simulation language, descendant of OPS-4, compiled into PL/I
      on Multics.
      "The SIMPL Primer", M.W. Jones et al, Oct 1971.