What would today's 18 year olds make of a slide rule?

They are clueless. I have a 14" K&E, double-sided. Hot-Sh*t in its
day... Once upon a time, I could even use it. For calculus even... The
kids (well over 18) only know what it is from me. Their kids? Not at
all.

Peter Wieck
Wyncote, PA