I must admit, I have never seen a pubnix quite like SDF before.
I remember this pico stuff from back in the early nineties, as it 
was the default editor on a pubnix where I was a user back then. 
But by that time, I was already fluent in vi, and I subsequently 
have found every other editor to be unwieldy and frustrating, 
with the possible exception of Emacs. 

It's hard to tell what's happening on SDF at times. I was weaned 
on Berkeley Unix in the 1980s, ran NetBSD and OpenBSD for hobby 
purposes in the 1990s, but SDF reminds me a little bit more of 
commercial timesharing systems from the 1980s, despite its basis 
in NetBSD. What a curious thing.

Looking forward to someday receiving the "arpa" green light and 
getting to actually know the place better.