> -----Original Message----- > From: tclug-list-bounces at mn-linux.org > [mailto:tclug-list-bounces at mn-linux.org]On Behalf Of Dan Drake > > > I'm teaching a math course for elementary school teachers, > and today we > told them about Reverse Polish Notation, just to make them think about > order of arithmetic operations. > > It would be nice to actually own an RPN calculator, so one could show > students that this isn't just an abstract curiosity. Does > anyone have an > old RPN calculator that they would sell me, or know where I could get > one? > > Dan There are many RPN calculator software emulators around. Some with source. Probably some of the old DOS and Windoze ones have been moved to Linux. Just try Google. My old HP-35 may be worth too much as a collector item... I have HP-15 and HP-16 and HP-12 as well. Many folks have the HP-12. Pawn shops often have various HP models. Chuck