in germany, you can still see the impact on whether CS emerged out of math or EE in the curriculums. When you have a lot of low-level programming, operating-systems, designing hardware etc. the departement was born in EE. If the emphasis is more on math, they teach you an abstract view on "computers" (the turing machine/lambda calculus as the foundation of computing) and view processors as just an application, it came from the math-departement. It's probably the same in the rest of the world.