Title: Crummy RPN
Product review: RPN does not work well and the stack is only 4 deep. I'm very disappointed in this machine. Don't buy this calculator if you've been using HP Calculators and are expecting RPN operation as HP has historically provided it. HP - DON'T MAKE A CALCULATOR AND SELL IT AS RPN IF YOU CAN'T GET IT RIGHT! THIS SHOULD NOT BE THAT HARD TO DO.
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