Horsepower (hp) is a unit of measurement of power (the rate at which work is done). There are many different standards and types of horsepower. 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 My section concerning the HP calculator is outdated but still online.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 hpcalc.org (http://www.hpcalc.org), 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 HPcalc.org 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 http://www.hpcalc.org/hp49/pc/rom/


    • 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


  • I receive my new notebook yesterday, it replace my HP NX7000 (3 years old). The HP NX 9440 is showing impressive performances, especially when running eclipseand multiple aplication in the backgroung.
    The specifications are as follow:
    Intel® Core™ 2 Duo Processor T7600 2.33 GHz 4 MB L2 cache 667 MHz front side bus
    3 GB (667 MHz)  DDR2 SDRAM
    NVIDIA Quadro FX 1500M graphics controller with 512 MB of dedicated video memory
    100 GB (7200 rpm) SATA
    LightScribe DVD+/-RW with Double Layer
    17.0-inch WUXGA wide viewing angle
    Dual pointing devices – Pointstick with three soft-touch buttons and Touchpad with scroll zone and three soft-touch buttons
    Integrated Broadcom NetXtreme Gigabit Ethernet with HP Smart Power NIC Technology PCIe Controller (10/100/1000 NIC)
    7.5 lb (3.4 kg)
    Integrated 16-bit Sound Blaster Pro compatible audio
    Integrated stereo speakers
    Integrated directional microphone
    External volume up and down, and mute buttons
    Stereo headphone/line out
    Stereo microphone in
    1 Type I/II PC Card slot
    1 Integrated Smart Card Reader
    1 7-in-1 Media Reader
    But there is some very strange technical choice, like
    • The position of all plugs, USB, VGA, network on both side which restrict mouse movements, a dubious decision!
    • The speaker are in front, below the case (pointing 45° into the ground) : crazy
    • On the back, you'll find the battery, very thin and without any mention of capacity!
    • The keyboard is one more time NOT standard (as on the HP NX7000), crazy layout of numpad.
    On the plus side, the graphic card (GPU NVIDIA Quadro) is able to play full HD (1980 x 1080 or 1080p) in full screen without any glitches!  Except than that, you can read numerous reviews:

    Ive put an impressive list of open source on it, thus limiting the total cost of licence ownership, the only commercial tools are: Microsoft Office because a lot of documents are floating around which can only be open in M$ Office, Symantec Antivirus, Groove network. The rest is made of the best open source tools:

    My pc is nearly operationnal, so I will be able to finally deliver new version of Joomla! components
  • hewlett_packard_collection_00

    This is not the Official Home Page. Click Here to go : http://www-miaif.lip6.fr/gerald/mk.html

    Please be patient I must updated all descriptions and credit to the authors. We need your help : Please help us and develop program for MDG Kernel.
    If You want to get in touch with the author : Gérald squelart or This email address is being protected from spambots. You need JavaScript enabled to view it.or from archive.org


    EditK(386oct)by ELTA (me : walter cedric)
    a replacement for the EDITB command.
    Now : Lib are visible, Asm can be edit and compiled automatically w/n error, rpl object are dissasemble and created easily (nothing on stack).

    Table.48g (29Ko)all credit to B. De Singlyconvert by ELTA (me : walter cedric)
    This is a replacement for the internal table of MDGKer. It use very simple and comprehensive mnemonics. Useful to dissasemble Rom entry Point.

    The original one, included with the package.

    Table Creator(109Ko)New Version
    You must recompile the old table in order to use them with MDGker 2.30
    Program to convert the startext file under Windows 95 into Ascii format and back In MDGker format.included with the package.


    TermHp by Jean Yves Avenard. (1.2Ko)
    TermHP is a terminal emulator for your HP48GX. TermHP is very small (1.2kb), and may be the only terminal for your HP48, which won't lose
    any characters. Full-Duplex, you can type and receive characters at the same time.

    Tools (1Ko)
    4 tools to switch between the different format: Grob<->font,external <->liste.included with the package.

    Mkutils (7 Ko)
    Man utils : flags, bzk, grob->font and much more.

    Gker (2Ko)
    Improve stack viewing with grey grob. included with the package.

    Kerutils (3Ko)
    Many good utils written in asm.

    MkFlags32 (3Ko) by Stephen JANNIN
    Manage hp48 flags and MDGker easily.HomePage: http://wwwperso.hol.fr/~janninst/

    Graphics and fonts

    15 differents fonts (15.3Ko). included with the package.

    3 Micro font(1.96Ko).included with the package.

    Startup:by ELTA (me : walter cedric)
    A nice picture done on 20th march 1998. Take any HP49/HP50G in the world, and do a soft reset (ON-C), and you can see.... my picture!!!!!. My signature is on the left corner, you can press ON quickly to freeze the pictures.

    Customize your kernel with some of these examples. included with the package.

    Articles (related from Comp.sys.hp48)

    Article from J. Y. Avenard : Contains description of each component of MDGker. Very Interesting.

    Article from J. Y. Avenard : It explain us the advantage of Masd notation.

    Article from Hp Mad : How to read Var in ML with MK and advantages of Masd.

    Bugs or problems

    My screen remained blank while edition after pressing on in user mode.