Mechanical Computers

Back in my Industrial Engineering days I took a course in analog computing. That must have been one of the last years that the course was taught. I was impressed with the technology, but soon forgot the whole idea. It was followed with easy access to timesharing, then desktops, then laptops and maybe soon cloud computing. The idea of mechanical computing, not the same thing as analog computing, but with some useful relationships, is being re-examined and worth understanding.