I built (against my will) a regex engine in college and it's the toughest, most CS'y "software pilgrimage" I could think of. In the same vein, I think buildin

I built (against my will) a regex engine in college and it's the toughest, most CS'y "software pilgrimage" I could think of. In the same vein, I think building or designing some of the components in an OS or Systems book[1] could have a similar positive result. [1] https://mitpress.mit.edu/books/elements-computing-systems-second-edition https://mitpress.mit.edu/books/elements-computing-systems-se...