On Wednesday, September 18, 2013, Tony Duell wrote:
I once repaired some kind of Tektronix workstation (I believe it was
originally intended to run Smalltalk)
Perhaps one of the 4404/5/6 line, which were variously marketed as
Smalltalk workstations or AI workstations. Though Tek had other
workstations that might have run Smalltalk, such as the 4300 series.
The 4404 family originally ran a Unix clone whose name escapes me, but
switched to UTek, derived from BSD 4.2. My hazy memory suggests that UTek
1.x might have been the clone, and UTek 2.x and later BSD.