> I heard back from Fred Wright: > > "Although I wasn't at SC in 1972, I'm pretty sure I would have heard of > the SC-4 if it had ever existed. The document you linked was just a > proposal, and I imagine that that's as far as it ever got. AFAIK, SC > didn't create any full-fledged computers between the SC-15 (1970) and > the SC-30 (1983)."
Following up about the SC-15: "It was a clone of the PDP-15, designed for Information International. The prototype was our main in-house machine for many years. III's main product at the time was the FR-80 microfilm recording machine, initially using PDP-9s and later PDP-15s. Our design let them build their own machines for substantially less than what PDP-15s cost from DEC. We provided designs and prototypes for everything up to the PLS (the Programmable Light Source, a small *very* high-resolution CRT) and camera. I think SC built one SC-15 as part of a system for the Nevada Test Site (while I wasn't here), but most of them were built by III."
