by ZachB » Tue Jul 01, 2008 5:47 pm
I feel comfortable saying that at least half of lovely users of this forum use RPN calculators. The best RPN calculator is the HP-32SII, but they usually cost about $200. Of the two affordable RPNs that I know of, the HP-35S and HP-33S, the former is much, much better for the Calc Apps contest (imho). Each of these costs, like, $50 or so. You can also find some HP32S floating around on the market, but I'm not sure how much they go for, and the difference in action compared to cost is likely such that you're better off getting a HP-35S because the features are much better on the 35S.