I can name three, too: Algorithms and Data Structures, Compiler Construction, and Artificial Intelligence. But their usefulness built atop a lot of math and ele

I can name three, too: Algorithms and Data Structures, Compiler Construction, and Artificial Intelligence. But their usefulness built atop a lot of math and electrical engineering. In hindsight, I wish I'd taken more history, economics, philosophy, and the like, but I was pretty narrowly focused coming out of high school, alas.