And as a continuation of it, with a little of Active Oberon and non-UNIX OSes along the way,<p><a href="https://www.systems.ethz.ch/node/1447" rel="nofollow">https://www.systems.ethz.ch/node/1447</a><p><a href="https://lec.inf.ethz.ch/syscon/2019/" rel="nofollow">https://lec.inf.ethz.ch/syscon/2019/</a>