Yes, it was a full Single System Image (SSI) system -- one of the 3B4000's SW architects was Tom Bishop, whom I'm still in contact (he's in the Austin these days).  Those folk did a nice job.  FWIW:   When the 4000 project was canceled in Indiana Hill, Tom joined us @ LCC to work on TNC.

On Thu, Jul 25, 2019 at 3:30 PM Kevin Bowling <> wrote:
ISTM the 4000 was one of the earlier UNIX clusters, very close to Locus in time? Any pointers for more info would be appreciated, I don’t care if it sucked it’s still interesting

On Thu, Jul 25, 2019 at 12:16 PM Lyndon Nerenberg <> wrote:
Kevin Bowling writes:

> Can you share any details or photos about that 3B?

Nope.  The only pictures I had of the '4000 were from the night we
"decommissioned" it.  They were lost many moves ago.  But even if I
still had them I would not let them out in public, to protect the

Which is a shame, because some of them were quite entertaining :-)