My wife uses her Polish ethnicity to claim stupidity when she doesn't want to learn something new. (It's really her German stubborness...) I tried to teach her to use my RPN HP32S. No go. She gets out her old adding machine and spends an hour at it.
Me, I'm mostly French extraction. You can guess what I want...
For those of you wondering what the heck is RPN, it's "Reverse Polish Notation". It's a calculator that's designed to do things like:
32 enter
16 divide
shows answer of 2.
The beauty of it is that you can keep going and going and going on long complex math problems. They feature a stack, so you can solve one piece and start another, while the last solution is "in the stack" (a little bit of memory to hold a few numbers). Once you get the second part solved, you can use the number in the stack and keep going with the bigger solution.
As stated above, once you get your brain wrapped around it, it's the only way to go.
