On Wednesday 19 July 2006 4:14 pm, Dan Drake wrote: > 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 One of my favorite options for RPN with programming languages is FORTH. It is completely stack based so is a real good illustration of doing things using RPN. Its also a great example of this technique being used for a practical purpose. FORTH was originally designed to control telescopes. More direct answers to your question: From Freshmeat I found this link: http://www.bellz.org/rpcalc/ -- Jack Ungerleider jack at jacku.com http://www.jacku.com