Source : Free On-Line Dictionary of Computing

PCL
     
        1. Printer Control Language.  A {Document description
        language} used by {Hewlett-Packard} {Laserjet} printers, a
        superset of {HP-GL/2}.
     
        [PCL 5 Printer Language Printer Technical Reference Manual, HP
        33459-90903.  Versions: PCL 3, PCL 5].
     
        2. {Portable CommonLoops}.
     
        3. Peripheral Conversion Language.  A {Honeywell} command
        language for {file transfer} between I/O devices on the {CP-V}
        and {CP-6} {operating system}s.
     
        4. ["PCL - A Process Oriented Job Control Language", V. Lesser
        et al, Proc 1st Intl Conf Distrib Comp Sys, IEEE 1979,
        pp.315-329].