An electronic calculator is a small, portable electronic device used to perform both basic and complex operations of arithmetic. read more at WikiPedia

  • hewlett_packard_collection_00

    I am a long user of HP calculator, in fact since 1991 and I have still kept my HP48GX with my license of MetaKernel 3.0 (paid 120 FF or 18€). I like the RPN way of doing thing, and I was lightning fast doing math thinking in my head like a RISC processor would do, small steps with limited operations, and a lot of intermediary results. I bought four calculator in the past 2 months: a HP48Gx , two HP 10 Business and a 20S scientific for a total of 5 euros!!! tripling my collection size. My section concerning the HP calculator is outdated but still online.

    Don’t forget also to visit (, the premier source of software for and information about the HP 50, HP 49, HP 48, and HP 28 RPN programmable graphic calculators and the HP 38G, HP 39, and HP 40 programmable graphic calculators.

  • hp-39-g2-calculator

    The HP 39gII (NW249AA) was released in October 2011. It is built around an 80 MHz Freescale (formerly SigmaTel) STMP3770 processor with ARM926EJ-S core and features 256 KB RAM and 128 MB flash memory (of which ca. 240 KB RAM and 80-105 MB flash are available to users). The high-resolution monochrome gray-scale LCD provides 256x128 pixels. Connectivity is provided through a USB-OTG Micro-AB connector. The BCD math libraries internally used by the calculator were rewritten in platform-independent C code run natively rather than System RPL code executed in an emulator. The Pascal-like programming language supported by the calculator is a predecessor of the HP Prime's HP PPL. The calculator is the first to support Unicode (UTF-16).

  • hp39gc-header

    The latest addition to my collection: a hp39gs calculator paid 5€

  • HP_calculator_museum_Hewlett_Packard_HP40G_Graphing_Calculator

    The HP-40G is an algebraic entry only graphing calculator from HP. Based on the HP-38G design, numerous firmware improvements and the inclusion of a CAS made this a very capable math platform. TheHP39g and the HP 40g were both released during the year 2000. They are made on the same hardware platform with 1MB of ROM, 256KB of RAM and have 51 keys. The physical difference between the HP39g and the HP 40g is the IR port - 40g does not have IR port.

    This calculator is also having the MetaKernel build in and the picture I did pixel by pixel on 20th march 1998 signed “CW” in the bottom left corner when you cold start it (ON-C no data loss, just a software reset). This work with any HP50g including emulators since the image is in the rom.

    The HP40g has the same mathematical capabilities as theHP 49.

    • 131x64 pixel, 8 line x 22 char. LCD
    • Algebraic ROM  1024 KB,
    • RAM/no. of variables or registers : 256 KB/unlimited
    • Over 750 built-in functions

    Date DEC 2002


    HP_calculator_museum_Hewlett_Packard_HP40G_Graphing_Calculator_2 HP_calculator_museum_Hewlett_Packard_HP40G_Graphing_Calculator_1

    • Menus, prompts, alpha messages, softkeys ---
    • Included SCIENTIFIC FEATURES : Boolean operations ,
      Polar/ rectangular & angle conversions
    • Computer Link Included
    • Notepad Inc (Built-in)
    • MATH & STATISTICAL FEATURES : Statistical analysis ;
    • +, -, x, /, sq. root, 1/x, +/-, 1nx, ex, n!, yx, logx, 10x, x2, %, pi;
    • Fractions, Trig., Hyperbolics, HP Solve (root finder);
    • Numeric integration/ Complex number functions;
    • SUM x, SUM x2, SUM y, SUM y2, SUM xy;
    • Sample std deviation/ mean/ weighted mean;
    • Linear regression, combinations, permutations;
    • Curve fit (LIN ,LOG, EXP, POW); Trace on a Fit
    • VECTOR & MATRIX OPERATIONS : Matrix operations, rectangular &
    • Polar HP matrix writer, row & column operations
    • CUSTOMIZING FEATURES : Method - HP Solve
      No. of steps/formulas or programs/ formulas - Unlimited
      within available memory
    • Graphing Functions with interactive graphics (2D)


  • hp10BBusinessCalculator_00

    With the HP 10bII you now have the power to keep up with all your growing course-load, small business or other financial calculations. You'll be able to work quicker and more efficiently with over 100 time saving, easily accessible business functions. Because it works in algebraic notation, it's easy to learn and use. From HP 10BII page


  • hp38gGraphingCalculator

    The HP 38G is a graphing calculator for high-school math and science teachers and students. Introduced in 1995 at $79.95, it supports aplets, small applications that can be developed as part of the curriculum and can be easily distributed from the teacher's calculator to the students'. Using aplets, all the students in the classroom can have their calculators programmed identically at the beginning of a lesson. Equations are entered using algebraic format rather than the Reverse Polish Notation (RPN) used by most HP calculators. (RPN is a system for representing mathematical expressions without the use of parentheses.) from HP Museum

    I was seeing this calculator when I was at engineer school, but was using a better HP48GX at that time

    Bough for 1€ on a flea market!

    Some more pictures


    And back


    Visit also HP Museum and section for HP38G for Documentation, Games, Math Aplets, Miscellaneous Applications, Programming Tools, Science Aplets, Utilities

  • hewlett_packard_49g_calculator_museum_00

    I recently added a HP 49g to my collection of HP calculators (Price paid: 3 euro). This model is not very loved by owner and is sometimes described as the worst model of HP calculator for the following reasons:

    1. The keys are soft and VERY imprecise: you need to press hard to enter data.
    2. Display harder to read than contemporary hi-end graphing
    3. Bad documentation compare to the HP46 series
    4. The default mode of the calculator is not RPN. To use the far superior RPN mode, press the mode key and choose RPN and clear flag 117 to make the calculator behaves just as an HP 48.
    5. HP has removed the equation library because it was forbidden in some colleges, but you can install it from here like any other program

    The latest operating system ROM are available at


    • Over 2,300 built-in functions for algebra, geometry, trigonometry, statistics/data analysis, calculus, science, engineering
    • 2-D and 3-D graphing capabilities
    • 131 x 64 pixel LCD (131 x 80 pixel LCD for the HP 49gii)
    • 1.5 MB RAM, no of variables or registers unlimited within available memory
    • Algebraic and RPN data entry
    • Built-in serial port; supports optional connectivity kit
    • Step-by-step mode for dynamic derivation, integration, and linear algebra problem solving


  • hp50gGraphingCalculator

    The ultimate graphing calculator for surveying, engineering, math and science professionals and students is even better. The new HP 50g graphing calculator features an SD card slot with formatting functions, RPN~, Algebraic and Textbook data entry, the largest high-contrast screen with more usable space than ever, serial port and USB and connectivity. Plus, HP Solve, structured programming and Computer Algebra System (CAS).

    This calculator is also having the MetaKernel build in and the picture I did pixel by pixel on 20th march 1998 signed “CW” in the bottom left corner when you cold start it (ON-C no data loss, just a software reset). This work with any HP50g including emulators since the image is in the rom.


    • altMassive 2.5MB total memory—512KB RAM plus 2MB flash ROM for performing future upgrades
    • Equation library and 2300+ built-in functions—ideal for both professionals and students
    • FREE USB connectivity kit with USB cable, connectivity software and pouch included
    • Choose RPN, Textbook and Algebraic entry and customize data with four font sizes and styles
    • Enhanced HP keypad with re-definable keyboard and menu keys allows for reduced keying errors
    • HP Solve application allows you to type and store an equation then use to solve any variable
    • Easily perform complex arithmetic and calculus functions with advanced Computer Algebra System (CAS)
    • New powerful SD card slot allows you to format your card right in the calculator and expand memory
    • Calculate advanced expressions and view solutions in 2- or 3-D graphical representation

    see HP Product