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Reference.org
WRPN Calculator
open-in-new
<ul> <li>Free and open source software portal</li></ul> <p>WRPN (or Windows Reverse Polish Notation) is an <a href="/facts/Open-source_software/HzTaB8E9">open-source</a> scientific <a href="/facts/Software_calculator/Lt3aKPXL">software calculator</a>, simulating the Hewlett-Packard Voyager series' <a href="/facts/HP-16C/qMnRzNaz">HP-16C</a> "Computer Scientist" <a href="/facts/Programmable_calculator/5UHx9nIg">programmable calculator</a>. </p>