HP PJL

A printer-specific driver from Windows will typically produce postscript for an HP printer which begins like this (note the the two non-ascii characters --- one at the beginning, one just before the Postscript itself begins):

    %-12345X\@PJL JOB NAME=\"Simonh's Stuff\"
    @PJL SET RET=OFF
    @PJL SET DUPLEX=OFF
    @PJL SET PRINTONBACKSIDE=OFF
    @PJL SET CLEANING=OFF
    @PJL SET ECONOMODE=OFF
    @PJL SET OUTBIN=UPPER
    @PJL SET FINISH=NONE
    @PJL SET PAGEPROTECT=AUTO
    @PJL SET PAPER=A4
    @PJL SET HOLD=OFF
    @PJL SET RESOLUTION=600
    @PJL ENTER LANGUAGE=POSTSCRIPT
    
M%!PS-Adobe-3.0
    %%Copyright: PS driver - Copyright 1996-2000 Hewlett-Packard Co.  
    %%Title: Microsoft Word - Document1
    %%Creator: HP/Oak PS2 Driver
    %%BoundingBox: (atend)
    ...
    ...