The Free On-line Dictionary of Computing (19 January 2023):

Actus

    Pascal with parallel extensions, similar to the
   earlier Glypnir.  It has parallel constants and index
   sets.  Descendants include Parallel Pascal, Vector C and
   CMU's language PIE.

   ["A Language for Array and Vector Processors," R.H. Perrott,
   ACM TOPLAS 1(2):177-195 (Oct 1979)].

   (1994-11-08)