Yes! HP28S for the win since 1987. I remember saving up for that when I entered school. (I think I have 4 spares now)

I recall that NCEES did not allow that calculator for the PE exam. I remember spending a year getting used to one of the 5 approved models and never using the HP. That was BRUTAL. As soon as I finished the exam I ditched the other model and went right back to the HP.

I think the stack and argument methodology of RPN calculators rules. As far as graphics go, it clearly is pretty weak compared to today, but man, I just love that calculator.