Source : Free On-Line Dictionary of Computing

Pascal-S
     
        Simplified Pascal.  June, 1975.  A strict subset of Pascal,
        omits scalar types, subranges, sets, files, pointers, packed
        structures, 'with' and 'goto.  Source for a complete Pascal-S
        compiler is in "Pascal-S: A Subset and Its Implementation",
        N. Wirth in Pascal - The Language and Its Implementation, by
        D.W. Barron, Wiley 1979.
     
        {(ftp://csseq.cs.tamu.edu/mcguire/pascal-s)}.