[kune]

Humboldt University Berlin had officially licensed a UNIX System III as a research institute. They run it on a K1600 series Robotron system, which was a PDP-11 clone. I had a few sessions on it ca. 1985 as a 16-year old kid as a member of the Mathematical Student Society of Humboldt University.

I remember being challenged to learn about the file system. All I was told was, use the man command. I knew CP/M, or better the East-German clone SCP, but that OS didn't know directories. I had to learn the concept from the man pages. There were no UNIX books in libraries or book stores. But it was fun, I managed to write a simple compression program doing run-length encoding on that system.