One thing that was once lost on me is that in the pre-calculator world, it wasn't just "here's a slide rule, sorry, calculators haven't been invented yet". Ther

One thing that was once lost on me is that in the pre-calculator world, it wasn't just "here's a slide rule, sorry, calculators haven't been invented yet". There was a whole variety of mathematical instruments to help you do different calculations: nomegrams, planimeters, derivimiters, and more. Want to evaluate an integral? Plot it down on some paper, then cut the paper out and weigh it. My go-to youtube channel for this stuff is Chris Staecker, who has a lot of these oddball math things and a bunch of mechanical calculators, too. https://www.youtube.com/@ChrisStaecker/videos https://www.youtube.com/@ChrisStaecker/videos