Classes and structures implies the moving around you’re talking about is in memory? You’d probably be looking at computer engineering courses there, or more likely OS design. OS classes get deep into kernel stuff. Advanced programming being in C++ lets you see how memory is tracked. I myself hated doing my own memory management, but if that interests you, then you’ll get a taste of that and more with anything to do with the kernel layer. That’d be DRM, worms, drivers, OS, and anti-virus. Could offer more, but it’s a little vague what you’re after specifically.