[mcguire]

About 80% of computer science is (discrete) math or (constructive) formal logic. Another 50% is electrical engineering, and the final 70% is operations research, quantum mechanics, and philosophy. The remainder is biology, psychology, and a sprinkling of physics. But the majority is really programming.

[Koshkin]

Right. There are three kinds of people - the ones that can count and the ones that can't...

Also, there is a difference between rocket science and computer science, in that the former is all about hardware while the latter is all about software (in the most general sense).