@MakerTube but seems like it's a very exclusive club for selected members only. My request which I sent weeks ago haven't been even answered. Seems like I'm not worth an answer...

@janbeta
In the case you didn't find any museum yet, what about HNF in Paderborn?
https://www.hnf.de/dauerausstellung/ausstellungsbereiche/computer-fuer-alle-1980-2000.html

@marix Die beste Einstellung, die man machen kann! NATÜRLICH Mit Erlaubnis des Netzbetreibers... Ist klar. 😀

@textfiles
I found my real HP! Even if it is without X -> Less memory: 32KB. But it still works! Just don't remember how to use it properly... I have to find the manual and try to remember.