.AP
.PR
.t DUPLEX  Abstract
DUPLEX provides the capability of having two computers talk to
one another over serial lines, while giving the user access to file facilities.
In use, it makes a PDP-11 running RSX-11M appear to be a smart terminal.
However, the combination of being able to talk to two or more computers 
from one terminal, and of being able to transfer files to and from each
computer in a clean and simple fashion, turns out to be extremely
powerful and convenient.
It is the poor man's DECNET, giving access to peripherals on both machines
for anything that can be transmitted over a serial line.