Source : Free On-Line Dictionary of Computing

ALGOL 68S
     
         A subset of {ALGOL 68} allowing simpler
        compilation, intended mainly for numerical computation.  It
        was rewritten in {BLISS} for the {PDP-11}, and later in
        {Pascal}.  It is available as {shareware} from Charles Lindsey
        .
     
        Version 2.3 runs on {Sun-3} under {SunOS} 4.x and {Atari} under
        {GEMDOS} (or potentially other computers supported by the
        {Amsterdam Compiler Kit}).
     
        ["A Sublanguage of ALGOL 68", P.G. Hibbard, SIGPLAN Notices
        12(5), May 1977].
     
        (1995-05-04)