In the last year I’ve picked up a couple of slide rules from the ‘Bay. An aluminum Pickett and a bamboo Post Vesalog. Both for a reasonable price. Am slowly learning how to use them. There is a learning curve involved, but there is something elegant about them.
I never used one, but a couple professors told me you get a deeper understanding after using one for some time.
And the batteries never go dead. LOL
Collected a few slide rules here, relearning them. Last time I used one was back in high school, 50+ years ago. Yes, there is an elegance about them. And most of the time, past the first three digits nobody cares.
We went to the moon with them. Literally. “Backup Computer” in the Apollos was a Pickett 600-T.
Also have a 41CX, thirty-plus years old, still works fine. Ran air-to-air intercepts with them in a past life. That was fun.