Was that in / near the University of Maryland in the late 1970's? I was working at a computer store in Rockville as a teenager. Chuck Rieger came in and showed me and the other employees the MicroAngelo. It seemed to be very expensive and very complex, if memory serves me right.
Scion was in Reston, Virginia, but Chuck was a professor at the University of Maryland as well. He eventually quit UMD to work at Scion full time. He's the reason I got the job, he was one of my UMD profs. The MicroAngelo was easy to program but expensive because it was basically a full computer. It had an onboard Z80 and 32K (later 64K) of RAM. I worked there from 1981 to 1983-ish, when they fell on hard times and had to lay a bunch of people off.
I'm immensely interested in the history of computing and computers. If it was ever the case you'd consider being interviewed about your experience (either on this topic, or others-- your HN comment history makes me think you've got a lot of interesting experience) please reach out. I don't know that I'd necessarily want to do the interviewing (it's nothing I've practiced), but I'd definitely try to help facilitate it. These stories are too valuable and interesting not to be told.
