I'll bet that you'll find Hacker News readers prefer RPN disproportionately, since it's closer to sexp evaluation (albeit, of course, postfix instead of prefix)

I'll bet that you'll find Hacker News readers prefer RPN disproportionately, since it's closer to sexp evaluation (albeit, of course, postfix instead of prefix). I prefer it because I did all my math-schoolin' years ago on an HP 48G, which also served as a platform for my introduction to programming. I like the calculator; the only confusing part so far for me was that top row of controls--to me, they look like buttons, so I expect them to display what they'll do, instead of the current mode.