******************************************************************
Pentti Kanerva at Stanford Spinners' dinner on April 28, 2015:


I will talk about what happened to the PDP-1 in Pine Hall after SAIL
moved to DC Power Lab.

I came to Stanford in 1967, to work in Patick Suppes' computer lab
in Pine Hall.

Pat was a professor of Philosophy and, by courtesy, of Statistics,
Psychology, and Education.  He was also the director of the Institute
for Mathematical Studies in the Social Sciences (IMSSS) and a pioneer
of Computer Assisted Instruction.  He and John McCarthy were partners
in getting the PDP-1.  When SAIL moved up hill, the PDP-1 was left to
Suppes and his IMSSS.

When I arrived, SAIL had already moved, so there is a gap between what
Les has told us and what I know at first hand.  The equipment in Pine
Hall consisted of

  PDP-1
    Swapping drum
    Philco displays
    IBM disk

The third timesharing system for the PDP-1 had just been completed.
It was called Zeus; the first two were Odin and Thor.

  (See "THOR--a display based time sharing system," by John McCarthy,
  Dow Brian, Gary Feldman, and John Allen.  AFIPS 1967 Spring Joint
  Computer Conference, pp. 623-633.)

Of the people in the IMSSS computer lab I want to name two and to
speak to their contribution:

  Dow Brian

    Zeus timesharing system (Odin --> Thor --> Zeus).
    Memory interface between the PDP-1 and a PDP-8 with 32 teletypes.
    Anything else that Pat would dream of.

    Eventually a home-built network of a PDP-10 and 5 PDP-8s
      served over 100 teletypes as student terminals
      in real time
      locally and across the country:
        Mississippi, Kentucky, Tennessee,  Washington DC.

    We controlled the remote PDP-8s from the PDP-10 and would boot
    them and download their software from Stanford much before that
    kind of thing was possible with industry-supplied hardware and
    software.

  Brian Tolliver

    TVEDIT
      Perhaps the first visual editor (along w/ Engelbart's @ SRI).
      Conceptually clean.

    There are Firsts, and then there are FIRSTS:

      Brian Tolliver's TVEDIT served as a model for what came after:
       - TV and E @ SAIL
       - TVEDIT for PDP-10s and DEC-20s @ Stanford
       - Emacs @ MIT
       - Editors at Xerox PARK
       - Apple's Lisa
       - Etc. etc. etc. ...

    Now all of us use computers for writing and editing, even if
    for nothing else!


A bit of Stanford CS lore:

  If you had built a major operating system (Odin, Thor, Zeus),
  you were likely to fail the Systems quals for your PhD.


What did IMSSS spin?

  SUMEX computer operation:
    Joshua Lederberg, Tom Rindfleisch

    TENEX adaptation of the SAIL programming language

    Clark Wilcox: MAINSAIL

  Computer Curriculum Corporation:
    Patrick Suppes

    Educational software


  I ask Bob Smith to speak to the IMSSS spin, having been a major
  contributor.

******************************************************************