And it is also a programming language, which can run on other OSes as well as on its own native one.

Here's a Windows version:

https://blackboxframework.org/

Here's a Linux version too:

https://blackbox.oberon.org/download

Renamed, but "Component Pascal" is Oberon.

Wirth's Oberon is a compiler, but Oberon can also be compiled with other compilers.

Vishaps interpiles Oberon via C using GCC, Clang etc.

https://vishap.oberon.am/

So does OBNC:

https://miasap.se/obnc/

Astrobe is another alternative compiler:

https://astrobe.com/

OberonC compiles it to the JVM:

https://github.com/lboasso/oberonc

Here is a list of others:

https://oberon07.com/compilers.xhtml

You are keen to rebut me, but you have not refuted me. Provide evidence for your case. Don't tell me I am wrong, because I've had decades of that and I don't care. Show me I am wrong and I will listen.

> "Oberon is an operating system"

<https://news.ycombinator.com/item?id=47762184>

Claim #1:

> this is not correct

<https://news.ycombinator.com/item?id=47763595>

Claim #2:

> It is an OS.

<https://news.ycombinator.com/item?id=47790959>

QED.

* * * *

> You are keen to rebut me

No, I'm really, really not. It would be great if you'd stick to wasting your own time in the future—or, better (esp. if you insist on involving others): only wasting the time of other people like you who would otherwise be doing harm elsewhere.