"Rechner" and "Computer" are interchangeable and probably used equally frequently, as are "Hauptspeicher" and "RAM", etc. Some words do seem to be mainly referr

"Rechner" and "Computer" are interchangeable and probably used equally frequently, as are "Hauptspeicher" and "RAM", etc. Some words do seem to be mainly referred to by their German names ("Betriebssystem", "Datenbank"), while for many others, I'm not aware of any German equivalent in common usage ("event sourcing", "operations", "pull/merge request", "branch", ...). Sometimes, in university courses I've seen German names for things I had only ever heard the English term of. I suspect almost nobody in the industry actually uses these German terms. So, not everything is in German. I guess it's probably mostly the stuff that's been around a long time that has acquired a German name, but newer tech is typically referred to by English terminology. I also agree with my sibling commentor that dismissing a culture because they don't exclusively use English terminology is silly. The German language certainly didn't stop Niklaus Wirth (who was from Switzerland and spoke German) from winning the Turing Award.