Nerbert, I have seen quite a few old non-analytic analog computers. I was fascinated with them. In some point in my studies I had to design a (not-so-simple) analog computer to solve an easy differential equation. I never actually had to build the thing so I have no idea if it really worked. So I cannot say I actually really used one.
So far @nerbert and @paul when the prize.
@Paul for still using 'Clipper'
@Nerbert for trying to hack an analog computer, by overflowing the input buffer to the integrator.