[xelxebar]

The Slide Rule Museum tickles hard some 2000's web nostalgia:

https://sliderulemuseum.com/

Last year I picked up a bamboo Hemi and worked through the (70yo!) workbook. The trigonometric scales are cool. Making a single slide to find all the sides of a triangle is surprisingly satisfying. It got me to realize that, sliderules with the right scales can solve the roots of any 3-variable equation. I guess this is why there was a proliferation of industry-specific sliderules back in the day.

More generally, aren't simple, well-engineered analog tools so satisfying?

[calmbonsai]

That's so cool. Like mathematical primitive archeology. The history of these sorts of analog computing devices that physically encode non-linear mathematical relations is fascinating.

With much tutoring, I learned to use a sextant and doing that gives one some sense of the "sorcery" and power achievable with blue-water navigation.

Boyer and Merzbach cover some of the development of these tools in their "History of Mathematics". Highly recommended.