what does “plc” mean here?

first of all i don’t “read books” in the classical sense. i think that the better the author, the fewer words they need to get their point across. (there’s a joke from zen buddhism that says that the truly wise master does not need a single word to make a student understand something.)

as a consequence, reading long texts and the accompanying physical pain are not an issue.

i’ve seen both. there is german program code with german variable names and german comments. yeah, it sounds about as strange as it is.

// diese variable beschreibt den luftzug an den messrohren
var trötflöte = lese_zahl_aus(datenbank);

but it’s rare. most people who work in IT in germany will write english variable names and english comments.