“...Does anyone know how to use a slide rule anymore?...”
Yes. I still have the one that I used back in the early 70s in engineering college.
It’s a real nice K&E....top of the line in its day.
I sometimes show it to my grandkids and try to explain to them how to use it.
They look at me like I’m some kind of a freak genius from another planet.
I still have my old Pickett from 1973. Once, around the end of 1984, I had a problem set due in a geophysics class and my TI calculator had just died. The answers only had to be to three significant figures, so I got out the slide rule. At the time, I’d study and do homework in one of the labs that was left open in the evenings, as did several other students. I ended up spending much of the evening showing the younger students how a slide rule worked (I was an old-timer of 29 then).
A month or two later I got my 15C.