I scanned some info on the launch of the Digital PDP11. As the documents
show, there was a "rev 1" PDP11/10 that was used as a process control
system. You could buy the 11/20 version that had the front panel.
Otherwise they were very similar/same systems. The "rev 2" PDP11/10 is the
unit most people are more familiar with, the core system is interchangeable
with the 11/05.
Most references I have seen on the WWW do not include the original
PDP11/10, anyone have one?
http://vintagecomputer.org/browse_thread.cfm?id=593
Bill