[d23]

> 4) I think this is actually the most important thing of all four.

I was surprised to see this so far down. I, on a somewhat regular basis, go back to system calls. Usually it's related to needing to strace a process, but it is also helpful when thinking about what's going on when I'm writing some high-level code and how that will be translated into calls to the kernel versus user-space execution.

Oh, but I really like watching the algorithm sorting gifs. They're neat.