This maybe a little off topic but... wait what? CERN had their own OS? What was its name?
Aside from NeXTStep, it was even before Linux was born. There were many historic BSD derivatives in that moment.
[1]: https://stackoverflow.com/questions/473758/what-does-the-ns-...
Sounds like this was pre-NeXT, or at least on another in-house OS. It would be interesting to see what it was all about.