High-quality black-and-white photographs of large old machines and tools

[mklotz]

Color picture and a bit more background...

https://spectrum.ieee.org/computing/...nalog-computer

When most of us think of analog computers we tend to picture racks of op-amps and giant plug boards for programming but simple mechanical computers can quickly solve problems that tax algorithm writers.

I recommend you read this article from the Scientific American Computer Recreations column for some examples of really clever analog computers. My favorite is the refinery locater computer made with string, weights, a board and a washer.

http://www.softouch.on.ca/kb/data/Scan-130202-0003.pdf