I've been working on the NatSemi PACE article and I'm trying to track down a bit of trivia... someone inserted a statement:
McDonnell Douglas produced a classified military 16-bit processor called the "Actron" around 1973
I did a bit of googling... Actron Industries was a company in the 1960s that McD purchased. The hits I found suggest they worked on optical systems and sensors, and there's a reference or two to data processing of those images, but from the 1980s.
I suppose that Actron might have built a CPU, but that seems unlikely. It's also possible they just called it that, or even more likely that it was used in an Actron product and the name got confused.
In any event, does anyone know of a McD processor?