15.64.18.32  Example   - To  get  plots  on  your  terminal  a VT-100 with
retrographics.
     TD:SET DEVICE TEKTRONIX "RVT100"

To get plots on another terminal (TTAn:) a VT-100 with retrographics.
     TD:SET DEVICE TEKTRONIX "RVT100" FILE=TTAn:

To get output on a Postscript printer:
     TD:SET DEVICE POSTSCR
The  actual output will be a file called filename.PS which must be printed
on a Postscript printer.

To get direct output to a spooled printer:
     TD:SET DEVICE POSTSCR FILE=LPA0:DUMMY.PS