Whatever happened to analog computers?
When I was at school, back in the 60s, they taught us that there were two kinds of computers: analog and digital. Digital computers were like electronic calculators; analog computers were more like electronic slide-rules, using physical properties such as the size of a current to model variables.
We were told that analog computers were much better than digital ones because they were faster and more accurate. The only advantage digital computers had was that they were more flexible; they could be reprogrammed where an analog computer had to be rewired.
Do analog computers still exist? I looked in Wikipedia but the latest references were to 60s technology.