Once, just after my TI calculator died, I was doing a geophysics problem set, in a lab where a bunch of us would study after hours. I was using my slide rule, and the younger students kept asking about it, saying how their dads used to have one and so forth. I ended up giving slide-rule lessons for much of the evening.
My class at VaTech was the last to use slide rule. By the time I got to my undegrad geophysics course I had long chucked my slide rule. (Actually I kept it and mounted it in a frame. Has an hnroed place on the wall of my home office.)