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\F2\CARTIFICIAL INTELLIGENCE LABORATORY
\CCOMPUTER SCIENCE DEPARTMENT
\CSTANFORD UNIVERSITY
\CSTANFORD, CALIFORNIA 94305
\F0



						September 10, 1973



Mr. John Leng
Digital Equipment Corporation
146 Main Street
Maynard, Massachusetts 01754

Dear John:

\J	It was good to meet with you again and especially to
hear that of D.E.C.'s plan to let us trade in our KA-10 and
PDP-6 on a KL-10 when that becomes available.  I would like to
express our thanks for this.\.

\J	In connection with this plan, I have some suggestions:\.

\J	I would like to have Ralph Gorin, our chief system programmer,
visit D.E.C. and have him learn about the KL-10
plans in connection with integrating the KL-10 into our system.
I would like our KL-10 to operate as far as possible as a
standard KL-10 running the standard KL-10 version of TENEX. 
This will be advantageous both to you and us.  The
mutual disadvantages of our simply putting a KL-10 in our system
in an ad hoc way may be imagined by remembering the consequences
of the M.I.T. Artificial Intelligence Laboratory having a bob-tailed
PDP-6.  Some of the consequences in terms of separation of M.I.T.
software development from the main stream are still with us.\.

\J	The areas in which we will probably want to make further
modifications to our system other than simple replacement are in the
area of the use of PDP-11's for controlling I-O and in the use of
displays.\.

\J	The area in which we consider ourselves in advance of the
rest of the time-sharing community is in the use of displays.  As
you may remember we have had 60 displays in our lab for two years
now, we have developed much experience and software for display
based time-sharing systems, and we plan further major improvements.
I hope we will be able to help get really good display
service into the KL-10 version of TENEX and that this will be of
benefit to ourselves, to D.E.C., and to the rest of the users.

	Would it be convenient to have Ralph visit, and would sometime
around the middle of October be convenient?\.




						Sincerely,



						John McCarthy
						Professor of Computer Science
						Director, Artificial Intelligence Laboratory