I know a researcher (Olivier Bournez) who uses the planimeter as an introduction to analog computing. His claim is that planimeters are single-purpose analog co

I know a researcher (Olivier Bournez) who uses the planimeter as an introduction to analog computing. His claim is that planimeters are single-purpose analog computers, much like calculators are single-purpose digital computers. He then logically generalizes planimeters into General purpose analog computers, which I find quite fascinating. https://en.wikipedia.org/wiki/General_purpose_analog_computer https://en.wikipedia.org/wiki/General_purpose_analog_compute...