Source : Free On-Line Dictionary of Computing

A PArse REquest Language
     
         (APAREL) A {PL/I} extension to provide {BNF}
        {parsing} routines, for {IBM 360}.
     
        ["APAREL: A Parse Request Language", R.W. Balzer et al, CACM
        12(11) (Nov 1969)].
     
        (1995-11-26)