Wikipedia

WRPN Calculator

WRPN (or Windows Reverse Polish Notation) is an open-source scientific software calculator, simulating the Hewlett-Packard Voyager series' HP-16C "Computer Scientist" programmable calculator.

WRPN
Other namesWindows Reverse Polish Notation
Developer(s)Emmet P. Gray
Initial release1.0 / April 3, 1995; 29 years ago (1995-04-03)
Stable release
7.1.1 / August 26, 2024; 2 months ago (2024-08-26)
Written inBorland C++, C#, VB.NET, ASP.NET. Java
Operating systemWindows, Linux, Unix-like, Mac OS, Android
Platformx86-16, IA-32, x86-64, ARM
SuccessorJRPN
Standard(s)RPN
Available inEnglish
TypeMath, Calculator
LicensePublic domain
Websitewrpn.emmet-gray.com

History

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On April 3, 1995, Emmet P. Gray,[1] an American programmer, at the time civilian employee at the US Army, now adjunct professor at the Texas A&M University,[2] released WRPN 1.0 (16-bit), a public domain open-source software written in Borland C++ 4.0 for early verions of Microsoft Windows.[3][4][5][6]

As of September 2024 the project is still in active development, and the latest WRPN 7.1.1 was released on August 26, 2024, for modern operating systems with Java installed, and as a mobile application for Android. Source code is available in C#, VB.NET, ASP.NET and Java.[7]

Features

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WRPN simulates almost all of the functions of HP-16C:

JRPN

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In 2019 Bill Foote, an American software engineer and ex-Lead of the Sun Microsystems' standardization of interactive technologies for Blu-ray and other TV platforms,[8] created the JRPN (JOVIAL Reverse Polish Notation Calculators), an open-source HP-16C simulator, forked from WRPN 6.0.2 in Java, but with all of the text set to be rendered from vector fonts (instead of the bitmap font used in WRPN), and licensed it under the free Apache License.[9]

I always wanted a 16C, but I never really needed it, and I was a starving student at the time :-) WRPN works great on Android, but the UI uses images that were created back when screen resolutions weren't so high, so I dropped Emmet a line, and re-did some of the UI and published that as what I'm now calling "Legacy JRPN".

— Bill Foote, Why Another Calculator Simulator?, jrpn.jovial.com

During the COVID-19 pandemic Foote fully rewrote JRPN code in Flutter and licensed it under GPLv3.[10] JRPN is available now in two variants, 15C and 16C (simulating HP-15C and HP-16C accordingly), for Android, Linux, Mac OS, Windows and as a web application.[11]

Also there is another RPN calculator of the same name, developed by William Giel as freeware proprietary software. It has been last released in 1999.[12]

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    WRPN, bitmap fonts UI
  •  
    JRPN (Legacy), vector fonts UI

See also

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References

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  1. ^ "Emmet P. Gray – author detailed information". www.hpcalc.org. Retrieved September 7, 2024.
  2. ^ "About Me". www.emmet-gray.com. Retrieved September 6, 2024.
  3. ^ "WRPN 16-bit 1.0 – detailed information". www.hpcalc.org. Retrieved September 6, 2024.
  4. ^ "WRPN Calculator". www.emmet-gray.com. Retrieved September 7, 2024.
  5. ^ "HP Calculator Simulations". www.hpmuseum.org. Retrieved September 7, 2024.
  6. ^ "HP-related Programs for the PC". www.hpcalc.org. Retrieved September 7, 2024.
  7. ^ "WRPN Source Code 7.1.1 – detailed information". www.hpcalc.org. Retrieved September 7, 2024.
  8. ^ "Bill Foote's Home Page". jovial.com. Retrieved September 6, 2024.
  9. ^ "Legacy Jovial RPN". legacy.jrpn.jovial.com. Retrieved September 6, 2024.
  10. ^ Foote, Bill (September 3, 2024), zathras/jrpn, retrieved September 6, 2024
  11. ^ "JRPN Calculators". jrpn.jovial.com. Retrieved September 6, 2024.
  12. ^ "JRPN – the Scientific Calculator for Java". www.kcmultimedia.com. Retrieved September 7, 2024.
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