What about the Gravity field and the Electric field? Then at the finals, you could talk about the cases where the electric field dominates (or the other way around) ...
Sorry, recovering from a quantum physics test
How 'bout Gauss? I mean, really, Gauss was everywhere. Number theory, imaginary numbers, linear algebra ... and that's not even to mention the half of it, and then there's his physics contributions (a little thing called Gauss's law for starters). Of course, as a programmer, I'd also have to appreciate Turing (previous suggestion).