NETGRF is an experimental TELNET/NGP server.  It will support several
users (as opposed  to regular  server, which  uses one  job slot  per
user), and  handles  a  subset of  Sproull's  NGP  (Network  Graphics
Protocol).  One  uses it  in  the same  way  as the  ordinary  TELNET
server, except  that  socket  41  (51  octal)  is  used  for  initial
connection protocol.  At the current  time, only new TELNET  protocol
is supported.  Thus under TENEX, type:

@TELNET
#CONNECT.TO SAIL 51

If your TELNET program supports NGP transformed  format,  a  greeting
should  appear on your screen.  As of now, few graphics programs have
been interfaced to  NGP; if  you want  to experiment,  you could  try
GEOMED (Baumgart's Geometric  Modeling program)  or NEWMUS  (Stanford
Music Compiler).

Please let me know the first time you use NETGRF by typing:
MAIL TVR
<message>
<control-Z>

If you have any comments, suggestions or complaints, or you want more
information, use the above procedure.  If you need  documentation  on
NGP, you can send a note to SPROULL@CMU-10A.