The Differential Analyzer (2020)

Was this machine using a mechanical version of Euler's method?

> Some kinds of differential equation are trivial to solve, but most others are so complex that it is hard to even express their solutions in concrete mathematical terms.

> The differential analyzer solved these complex differential equations by numerically approximating them. The machine could do this even though it contained no electronic circuits, logic gates, or anything else that we might associate with a digital computer. It relied instead on the interplay of various mechanical moving parts to compute results.