Browse free open source RPN Calculators and projects below. Use the toggles on the left to filter open source RPN Calculators by OS, license, language, programming language, and project status.

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    Simplify Purchasing For Your Business

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  • 1
    WP 34s

    WP 34s

    Scientific/engineering firmware repurposing HP business calculators!

    This project has created scientific firmware for the HP-20b and HP-30b business calculators. WP 34S turns either of these calculators into a powerful keystroke programmable scientific device. According to our customers, it's the most powerful and fastest RPN scientific pocket calculator ever built. WP 34S is alive and stable since 2011. We have succeeded in satisfying the most picky users - read about their experiences on http://www.hpmuseum.org/forum/forum-8.html. Since 2014, WP 34S runs in version 3.3. Our customers confirm its documentation is excellent and comprehensive (see feedback); a full-color printed edition is available from https://www.amazon.com/dp/153366238X since 2018-10-15. Alternatively, you can get a personalized pdf-manual for a ≥ 9 US$ donation here. We have also produced the WP 31S which is derived from the WP 34S source code. This is an entry-level scientific calculator. Its printed manual is available from https://www.amazon.com/dp/1499231164 .
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    Downloads: 31 This Week
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  • 2
    4tH compiler

    4tH compiler

    A Forth compiler with a little difference

    4tH is a Forth compiler with a little difference. Instead of the standard Forth engine it features a conventional compiler. 4tH is a very small compiler that can create bytecode, C-embeddable bytecode, standalone executables, but also works fine as a scripting language. It supports about 95% of the ANS Forth CORE wordset and features conditional compilation, pipes, files, assertions, forward declarations, enumerations, structures, suspended execution, recursion, include files, etc. It comes with an RPN calculator, BASIC interpreter, line editor, preprocessor, compiler, decompiler, C-source generator, a virtual machine, and a multitasking environment.
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    Downloads: 95 This Week
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  • 3
    RPNcalculator
    Nice looking calculator using Reverse Polish Notation (RPN) written for Windows. It supports DEC, HEX, BIN, OCT numbers, GRAD, RAD and DEG.
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    Downloads: 11 This Week
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  • 4

    galculator

    galculator is a scientific calculator in algebraic mode and RPN

    galculator is a GTK 2 / GTK 3 based scientific calculator supporting algebraic mode as well as RPN. Features include arithmetic precedence handling, mathematical functions, different number bases (DEC, HEX, BIN, OCT) and angle bases (radiant, degree, and grad). Please note: This project page at sf.net reflects the state of the project up to August 2015. Beginning in September 2015, the project homepage was moved to http://galculator.mnim.org, with the source code repositories and issue trackers hosted at https://github.com/galculator/galculator.
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    Downloads: 7 This Week
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    Inventory and Order Management Software for Multichannel Sellers

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  • 5
    TRURL

    TRURL

    A suite of RPN calculators and a class library for Object Pascal

    TRURL is a suite of desktop calculators with reverse Polish notation (RPN) written in Object Pascal. Additionally, it comes with a free reusable class library (RPN Engine) as a toolbox for creating your own calculator. TRURL is an acronym for "TRURL is a Reusable Universal RPN Library". Class Libraries: • RPN Engine: Full-featured calculation engine for Pascal-based RPN calculators • Segmitator: Library for virtual seven-segment displays Applications: • TRURL A: Simple demo app for the RPN Engine • TRURL B: RPN calculator in the design of the famous calculators by Dieter Rahms for Braun • TRURL G: Desktop RPN calculator inspired by the UI of the DSKY unit of the Apollo Guidance Computer (AGC)
    Downloads: 17 This Week
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  • 6
    Calcoo is a scientific calculator (with both RPN and algebraic modes) designed to provide maximum usability.
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    Downloads: 16 This Week
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  • 7
    RPNCalc

    RPNCalc

    RPNCalc - The command line Reverse Polish Notation (RPN) Calculator

    RPNCalc is the command-line based Reverse Polish Notation (RPN) calculator. RPN calculators make it very simple to do complex calculations, especially if there are parentheses involved. I've created a User Guide (https://frossm.github.io/RPNCalc-UserGuide) to do a better job of explaining how to use RPNCalc than the old readme.md file, which was getting really long. If you have questions, issues, feedback, or ideas, please let me know. You can contact me via the links in the **Introduction** page of the User Guide. ## RPNCalc User Guide: https://frossm.github.io/RPNCalc-UserGuide ##
    Downloads: 11 This Week
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  • 8
    BitLogic

    BitLogic

    Simple Java computer algebra calculator

    A calculator that solves many types of problems including solving equations computing derivatives and integrals simplifying expressions graphing equations 2d and 3d reverse polish notation, algebraic and word based interpreter infinite writing board for writing out equations requires java 11 or more
    Downloads: 8 This Week
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  • 9
    This is a Reverse Polish Notation (RPN) Fraction Calculator. It works like any other RPN calculator, except that it operates on fractions instead of decimal numbers. Decimal number entries are not permitted. Whole numbers are permitted.
    Downloads: 5 This Week
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  • Next-Gen Encryption for Post-Quantum Security | CLEAR by Quantum Knight Icon
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  • 10
    IntervalRpnCalculator

    IntervalRpnCalculator

    An HP RPN calculator with interval output

    This terminal app runs on PCs or laptops running OSX or GNU/Linux. It attempts to mimic the functionality of an HP ReversePolishNotation [RPN] calculator with the added enhancement of interval output. So along with your answer, you get a good idea of its trustworthiness. This app uses GAOL, a C++ library to perform arithmetic with floating-point intervals.
    Downloads: 3 This Week
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  • 11
    Reverse Polish Notation interpreter for use as an interactive calculator in conjunction with the standard Python interactive interpreter. Easily extended by the user.
    Downloads: 3 This Week
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  • 12
    Baculator is a Reverse Polish Notation (RPN) calculator program with an infinite scrollable stack and support for most common mathematical operations as well as some more esoteric operations. Available for Unix/Gtk+, Mac OS X, and MS Windows.
    Downloads: 2 This Week
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  • 13
    Differential Calculator

    Differential Calculator

    Terminal calculator with differential error estimates

    This is a terminal calculator with a remarkable twist. It uses symbolic differentiation to provide a numerically precise error estimate with each calculated answer. It mimics the functionality of an HewlettPackard ReversePolishNotation [RPN] calculator simply because I like RPN. But along with your answer, you get some measure of its trustworthiness. Runs on PCs or laptops running Windows or Linux.
    Downloads: 2 This Week
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  • 14
    WA2L/WinTools

    WA2L/WinTools

    End User Tools for Windows.

    Some end user utilities for the Windows operating system. The utilities can be called thru the "Send To" context menu when right-clicking on a file or directory in the explorer or thru the Windows "Start Menu". The package can be 'installed' portable and does not need admin rights. ◆ 𝗨𝗧𝗜𝗟𝗜𝗧𝗜𝗘𝗦 - https://sourceforge.net/projects/wa2l-wintools/files/ → README ◆ 𝗙𝗘𝗔𝗧𝗨𝗥𝗘𝗦 - https://wa2l-wintools.sourceforge.net/man1/wintools.1.html - https://wa2l-wintools.sourceforge.net/man1/wintoolsintro.1.html ◆ 𝗣𝗔𝗖𝗞𝗔𝗚𝗘 𝗗𝗢𝗖𝗨𝗠𝗘𝗡𝗧𝗔𝗧𝗜𝗢𝗡 - http://wa2l-wintools.sourceforge.net/ ◆ 𝗦𝗘𝗘 𝗔𝗟𝗦𝗢 🚩 - https://sourceforge.net/p/wa2l-wintools/wiki/Home/ ◆ 𝗣𝗔𝗖𝗞𝗔𝗚𝗘 𝗙𝗢𝗥𝗠𝗔𝗧 The package is distributed in the following format: - WA2LWinTools-<VERSION>-<DATE>.exe (self extracting zip file) ◆ 𝗢𝗧𝗛𝗘𝗥 𝗣𝗥𝗢𝗝𝗘𝗖𝗧𝗦 - https://sourceforge.net/projects/wa2l-simplebackup/ - https://sourceforge.net/projects/wa2l-edrc/ .
    Downloads: 2 This Week
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  • 15
    kalc is a programmable scientific calculator, using RPN (Reverse Polish Notation). Its behaviour imitates a HP48/HP49 calculator. Works with real and complex numbers, unlimited size integers, arbitrary-precision real numbers and more.
    Downloads: 2 This Week
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  • 16
    Reor Calculator

    Reor Calculator

    Reor is a winsome calculator with loads of functions, by Ajay Menon.

    Reor is a free calculator which is crafted into perfection with a winsome interface. Reor has got Scientific, Statistical, Graphical and many more types of tools built-into it, while maintaining an attractive interface.
    Downloads: 4 This Week
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  • 17
    An open source RPN calculator written in C
    Downloads: 1 This Week
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  • 18
    gdcalc

    gdcalc

    financial, statistics, scientific and programmers calculator

    NO LONGER MAINTAINED HERE - GONE TO https://gitlab.com/wef/gdcalc gdcalc is a financial, statistics, scientific and programmers calculator for Unix and Linux. The GUI was written with glade(1) and uses the Gnome/Gtk-2 toolkit - so it may well be compatible with themes and other whiz-bang features of those systems. gdcalc has both Algebraic notation (ie. conventional, TI or Casio style) and Reverse Polish Notation (RPN or Hewlett-Packard style). If you've not heard of RPN before, you are probably familiar with algebraic calculators. Very briefly, while simpler and more natural to use, RPN calculators need some study eg. they have an Enter key instead of the equals key. New home page: http://bhepple.com/doku/doku.php?id=dcalcunix Old home page: http://bhepple.freeshell.org/dcalc/unix
    Downloads: 1 This Week
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  • 19

    npadcalc

    Desktop RPN calculator

    A desktop RPN calculator app, optimized for use with full-size keyboard. Written in Rust with gtk-rs GUI. This app was developed as a learning project, but one may still find it useful for performing simple calculations.
    Downloads: 1 This Week
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  • 20
    An RPN calculator design to manage well with stdin stream of number and operations
    Downloads: 0 This Week
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  • 21
    Programmable RPN and Algebric calculator. Written with Kylix3 OpenEdition for Linux. Mathematic - Trigonometric - Calendar - Financial functions. Very easy to use. Italian and English language. More details on my home page: http://mcz.altervista.org
    Downloads: 0 This Week
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  • 22

    C_Sharp_Calculator

    RPN based calculator in C#.

    Currently, this is the first version of an RPN calculator made to be easy to implement for any C# project requiring parsing of text into calculable data. Using RPN (Reverse Polish Notation) to place strings in a specific format to allow fast processing for parsing and evaluating the string.
    Downloads: 0 This Week
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  • 23
    "Caltos" ( french slang word for calculator ) is a command-line RPN ( reverse polish notation ) calculator, using ncurses.
    Downloads: 0 This Week
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  • 24
    Calx is a calculator program based on RPN (Reverse-Polish Notation) that allows you to compute complex mathematical expressions containing brackets, mathematical functions etc.
    Downloads: 0 This Week
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  • 25
    The purpose of the CoCalc project is to develop a simple RPN calculator application for use on laptops running OS X. It has been developed in Cocoa and Objective C, although it may change to a PyObjC application in the future.
    Downloads: 0 This Week
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Guide to Open Source RPN Calculators

Open source RPN calculators are specialized programs that use the Reverse Polish Notation (RPN) system of calculating. This type of calculator is based on the mathematical principles of postfix notation, an algebraic expression form with operators written after their operands. This approach to calculations provides a practical alternative to inputting equations in infix notation, the more traditional way of writing expressions in which operators come between their operands. While RPN can be difficult for beginners to understand and use, it has become popular among professionals due to its simple computations and fast calculations.

Open source RPN calculators are programs that allow users to modify or enhance as they see fit using programming code from websites like github.com or SourceForge.net . These programs are generally designed by open source software developers who provide them for free and include features such as equation solving, graphing capablities, 3D plotting tools, and other functionalities. The advantage to using these types of calculators is that users have access to advanced tools without needing expensive proprietary software packages.

There are many open source RPN calculators available on the market today including four main options: HP-48G/GX series, TI-59/82/85 series, Free42 Calculator Simulator, and GCalc3 Calculator Applet Emulator. Each one offers specific features tailored towards various user needs like business applications and engineering projects while providing complex functions like matrix operations and statistical analysis capabilities at no cost to the user. For example with HP-48G/GX series you can find support for multiple languages (including Basic), real and complex number functionality plus graphics capabilities all available through a single package. In addition there are several other models offered by other companies such as Global Prime’s GPrime calculator which offers graphing capabilities not found in some more basic models while programming flexibility challenges those looking for advanced projects from their calculator experience as well as computer scientists who want access to low level machine language functions via assembly language commands found natively within these devices.

In conclusion, open source RPN calculators offer both professional grade calculation power at no cost coupled with a great deal of flexibility allowing users tailor each device according to their individual needs whether it’s business or mundane computing tasks or deeper exploration into mathematics such as statistical analysis, graph plotters, calculus etc.

Features of Open Source RPN Calculators

  • Command Line Functionality: Open source RPN calculators typically feature a command line interface for entering instructions and equations. This allows users to quickly perform calculations and store information without graphical user interface.
  • Stack Memory: RPN calculators usually include a stack memory for storing values and data results from operations. The capacity of the stack can vary depending on the type of calculator, providing more space for storage as needed.
  • Keyboard Shortcuts: Many open-source RPN calculators provide access to keyboard shortcuts which allow users to quickly enter equations or commands without using the mouse. These shortcuts can reduce time spent inputting equations, providing a faster way to operate the calculator.
  • Programmability: Most open-source versions of an RPN calculator are programmable, allowing users to write macros or programs that contain multiple steps which can be triggered with a single keystroke or hotkey combination. This enables increased efficiency when performing repeated calculations or tasks with similar parameters each time.
  • Variable Storage: Some open-source versions of an RPN Calculator provide the ability to save variables into memory for reuse within other equations and tasks being performed on the calculator. This allows users to keep frequently used values stored for quick access instead of having to reenter them every time they need them.
  • External Functions Support: Linking external functions into your open-source RPN Calculator is also possible in certain cases, enabling integration with other tools such as databases or statistical software packages that may be used alongside it to further expand its capabilities beyond what is built into its core functionality alone.

What Types of Open Source RPN Calculators Are There?

  • Desktop Calculators: These are stand-alone programs that can be installed on a computer and used to perform mathematical operations, including RPN calculations. They typically feature a graphical user interface, allowing users to input commands using their mouse or keyboard. Some desktop calculators have additional features such as graphing capabilities and built-in programming languages.
  • Web-Based Calculators: A web-based calculator is an online application that allows you to perform mathematical operations right in your web browser window. Unlike a desktop calculator, these are often hosted on third-party websites and require no installation or configuration. They may also offer collaborative features such as the ability to share calculations with other users.
  • Mobile Applications: Mobile applications (apps) for RPN calculation are available both through online stores (such as Apple’s App Store) and from open source developers. Depending upon the app, you may be able to use the same functionality that desktop calculators provide but with extra convenience—since the apps can run directly on mobile devices like smartphones and tablets.
  • Reverse Polish Notation Libraries: If you want total control over how you work out your RPN calculations, then you can make use of one of several open source libraries written in popular programming languages like Python, Java or C++ which allow for in-depth customization of your calculator’s operations.

Open Source RPN Calculators Benefits

  1. Freedom: Open source RPN calculators give users more freedom to customize their calculator, allowing them to alter code, add features, and create custom libraries.
  2. Cost: Most open source calculators are free or come with a much lower price tag than their proprietary counterparts.
  3. Flexibility: With an open source platform, users can easily move between multiple operating systems for easy portability of data, functions and settings.
  4. Security: Open source platforms often have a large community around them who look for vulnerabilities and help patch any existing security problems quickly. This helps ensure the safety of data and provide reassurance that user information is secure.
  5. Accessibility: Open source software is accessible to everyone which means it can be used by people regardless of language, ability level or location.
  6. Support: The large user base associated with open source projects makes it easier to find help when needed as well as get feedback on new features or ideas.

Who Uses Open Source RPN Calculators?

  • Students: Students use open source RPN calculators to complete assignments, practice problem-solving skills, and generally familiarize themselves with programming.
  • Scientists: Scientists rely on open source RPN calculators for precise calculations in the fields of math, physics, chemistry, and engineering.
  • IT Professionals: IT professionals often need an RPN calculator to quickly solve complex computer problems, debug software code, or check data patterns.
  • Hobbyists: Hobbyists are drawn to open source RPN calculators as a way to learn more about mathematics and programming techniques without having to invest in expensive hardware.
  • Researchers: Researchers use open source RPN calculators for statistical analysis of data sets when working on projects related to their specialized field.
  • Financial Analysts: Financial analysts use open source RPN calculators for financial modelling purposes such as forecasting future stock prices or calculating the impact of investments over time.

How Much Do Open Source RPN Calculators Cost?

Open source RPN calculators are completely free to download and use. One great example of a free open source RPN calculator is the Free42 simulator, which was developed by Thomas Okken and released under the GNU General Public License. It features an intuitive user interface, full precision arithmetic, Boolean logic operations, plug-in support for laser printers, a built-in programming language for extending the calculator's capabilities, and more. It is available for Windows, Linux/Unix systems as well as Mac OS X. If you're looking for other open source RPN calculators there are plenty others out there that don't cost anything at all – such as its cousin TAS Calculator (a mathematical tool with similar features), or Mathomatic (a general symbolic math program). Ultimately, when it comes to open source RPN calculators you won’t have to break your wallet – they come at no cost.

What Do Open Source RPN Calculators Integrate With?

Open source RPN calculators can integrate with many types of software. Examples include scientific graphing packages and computer algebra systems, which allow users to graph functions, perform symbolic manipulation and interactive calculations, as well as to work with mathematical equations. Additionally, open source RPN calculators can be linked to spreadsheets for data analysis and can also be connected to other programming languages such as Java or C++ for more comprehensive calculations. Finally, connecting the calculator with a web interface allows the creation of virtual calculators that are accessible over the internet.

Open Source RPN Calculators Trends

  1. Open source RPN calculators are becoming increasingly popular among developers, engineers, and scientists. This is because they offer a powerful and efficient way of performing complex calculations quickly and accurately.
  2. With open source RPN calculators, users can make modifications to the code in order to best suit their needs. This makes them more versatile than many other types of calculators.
  3. Open source RPN calculators offer a wide range of features that are not available with traditional calculators such as symbolic manipulation, graphical display, scripting capabilities, and others.
  4. Open source RPN calculators have seen an increase in popularity due to their ease of use and flexibility. They can be used by anyone regardless of their programming experience or technical knowledge.
  5. The open source nature of these calculators allows developers to share code and collaborate on projects which has led to the development of many innovative tools and applications.
  6. In recent years, the popularity of open source RPN calculators has grown significantly due to the emergence of powerful tools such as WolframAlpha and Mathematica which make complex calculations easier than ever before.

Getting Started With Open Source RPN Calculators

Getting started with open source RPN calculators is relatively straightforward. The first step is to find a calculator that meets your needs and download it onto your computer or mobile device. Most RPN calculators are available as free downloads on the internet, and some may even come preinstalled on your device.

Once you've downloaded the calculator, you'll need to familiarize yourself with its features and functions. Many open-source RPN calculators come with helpful user manuals that explain their features in detail, so make sure to read through it before using the calculator for the first time. It's also important to understand how RPN works, since this type of calculator requires users to enter commands in reverse order compared to other types of calculators. This can be confusing at first but becomes easier over time once you get more comfortable with the concept.

When it comes time to start using the calculator, begin by setting up any options or preferences that are available on the particular model you have chosen; many popular models allow users to customize settings such as decimal places and angle units (degrees or radians). Then start entering commands into the console window — most commands should appear in a certain format (eg: 5 ENTER 7 +) and will yield results depending on what calculation you're attempting. Be sure to look back at the user manual if anything seems unclear or unfamiliar.

Finally, open source RPN calculators often support "stacks" which let users save data and calculations they may want to refer back to later — these stacks can generally be recalled from memory even after closing down then opening up again later. Stacks are a useful feature for anyone who uses their calculator frequently or wants quick access back to information entered recently without having to repeat calculations all over again from scratch each time.

Overall, getting started with an open source RPN calculator isn't too difficult — just take some time reading through any documentation available about your model of choice before beginning use, experiment around a bit until you get comfortable with its operations, and make use of convenient stack features when possible.

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