"DO" IS A CUSP  PROGRAM  WHICH  ALLOWS  YOU  TO  GET
A LARGE AMOUNT OF TYPING DONE WITH A SINGLE COMMAND.
SIMPLE STRING VARIABLES ARE AVAILABLE  FOR  PLUGGING
IN  FILENAMES  ETC. THE DOCUMENT DO.RPH[UP,DOC] GIVES
A MORE COMPLETE  DESCRIPTION.  THE  RESIDENT  EXPERT
IS DICK HELLIWELL.