Did you know, that 2 unixoid operating systems existed in former East Germany (GDR), which was part of the communist eastern bloc?
One was a #Unix V Clone named #MUTOS (MultiUser Time Sharing Operating System) for the K1630, a 8 bit micro computer.
The other one was #WEGA for the 16 bit P8000 computers. Both ceased to exist with the german reunification.
Article on MUTOS (in german) with screenshots: https://www.robotrontechnik.de/index.htm?/html/software/mutos.htm
Article on WEGA (in german) with screenshots:
https://www.robotrontechnik.de/index.htm?/html/software/wega.htm