[cb321]

I like your focus on better questions. "those topics and any other that come up" was especially vague as was "semi-unknown". ;-)

FWIW, I doubt anyone was suggesting "large scale applications programming in C"..Just the nuts & bolts & basic vocabulary..the way a program/process interacts with an OS, etc. in the very simple cases/scenarios. The main (but not only) way people use Nim is through the C backend. { The code generated by the Nim compiler is not that easy to read or intended to be so, of course. } There are also OS books to consider like The Design of The Unix OS or Advanced Programming in the Unix Environment. These also use very minimal little C examples. Everyone learns differently, though. I think more delineated goals and background level would yield better advice for @budafish.

Teaching has also evolved over the decades. Teaching of C was/is more "hand in hand" with the ideas the poster was asking about. For example, the K&R C book walks you through writing both stack allocators and heap allocators on top of raw memory.