The Elements of Computing Systems: Building a Modern Computer from First Principles (The MIT Press)

by Noam Nisan

source issues,

“the only kind of learning which significantly influences behavior is self-discovered or self-appropriated—truth that has been assimilated in experience.”

In computer science, we take the notion of abstraction very concretely, defining it to be a statement of “what the entity does” and ignoring the details of “how it does it.”