HP-35 RPN Calculator

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This JavaScript simulator is a very faithful simulation with the exception of some rounding errors. Both the HP-35 and the JavaScript produce rounding errors, but they do so in different situations. It was written by Neil Fraser. If you are using Internet Explorer you may find that the display sometimes updates quite slowly across the network. You may want to download your own copy. The ZIP file has all the code and graphics (50KB). The simulator on this page and the one in the zip file have been updated with a bug fix from Hans Klaver.