No sweat.

I remember using Apple Forth (from Cap'n Software) in 1982 in Independent Study in high school. I made a cloud chamber simulator with it for the Physics department. (Side note: my public high school had an awesome science department: a radiation class complete with scintillation counters, a cobalt source in a lead pig, etc. PDP-11 and Apple IIs, small radio telescope on the roof. Riverview High School, Sarasota, FL; no idea what it's like these days.)

Wow, I spent two years looking after a PDP 11/23 running RTS/E. Interesting times... In that I've never met anyone less than 20 years older that understands what I've done (and to be fair most of those older than that have an aamazing understanding compared to me), I found it amazing that between the PDP and AS/400 box at work that they were bought by people that retired a long time ago and still ran, not that the data coming out was accurate. I think the rest of my employer's place was like that, and perhaps that was part of the problem.