rpn? If you don't do rpn, you don't do real math :^P
That's kinda cool. It never occurred to me to look for an RPN PC-utility calculator. It's funny - I use an HP calculator
* for my "math" needs when I'm not sitting in front of the computer (98.8% of which are
mere arithmetic, for that matter, with the other 1.2% being pathetically simple algebra

) and I barely even think about the fact that I (naturally) use RPN on it... But I think I
would find it odd to switch over to it with a PC utility, just due to decades-long habit.
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* Talk about proverbial "Energizer bunnies" - my HP is literally 30+ years old and shows no signs of degradation whatever, except for a couple of little dings in the aluminum casing around the display.