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• A HP12c's innards• A comparison between the latest HP12c and the upcoming HP12c• Another speed comparison for the HP15c Collector's Edition• Are the new Voyagers firmware re-programmable?• Calculate digits of e• Default shipping costs• Difference between standard case and leather case for the HP15c calculator• File away these solder peaks!• Glue for HP41 repairs• Good news: HP41CL is coming back !!!• HP10bII+ and newest HP12c "on its way"• HP10c for repair!• HP12c accuracy in AMORT calculations• HP15 corner• HP15c Collector's Edition speed tests• HP15c Manuals• HP41 repairs• Happy new 2023• Important announcement regarding HP15c CE deliveries• Just in...• More comments on the new HP12c• New HP12c: so far so good!• New HP Models arriving• New, ecological packaging for the HP Prime calculator• Price Reduction for new HP calculators• Reprogramming current models• Selling the HP15c CE to non-fanatics• Solving a 8x8 equation system in the new HP15C Collector's Edition• Speed comparison between latest HP12c and the new batch just received• Speed in calculators• Speed tests for the HP12c• The HP15c Collector's Edition• Unboxing the new HP10bII+• Unboxing the new HP12c• Unboxing the new HP15c Collector's Edition• Valentín Albillo's Articles• Valentin Albillo's new site• CAS!!• Games for the HP Prime• HP4c feet for free on orders >40€• More places to find Prime software• 2 HP41cL on offer• More pictures of the new zebra prototype• HP50g Blue no more!• The problem with ordering bulk in China• Offers for Black Friday - 2• Assembled flex and standalone flex circuits back in stock• New Prime firmware coming!• Last HP12c Anniversary and HP15c Limited Edition!• Now on sales - the zebra replacement!• Interesting video about HP graphical calculators• to do list• The calculator as a gift 2• NPV and IRR on the HP Prime• My HP calculator history (I)• RPN Spreadsheet behaviour• wp34s - part 1• more info about the HP41CL• Zebra connectors for HP• Printer paper for HP calculator printers• Tomcat battery prototype• Yet another method for Pi - this time from the outside!• News• Repair your calculator during the lock down!• Four new products• Some more pictures of the other colors for Voyager cases• HP54201D mixed signal oscilloscope available again• Available HP41CL units - and time modules!• Some challenges with the new firmware• Wsih list for Moravia-Royal• Register Arithmetic on the 12c• How I have configured my HP 15c for financial duties• HP42s• First appearance on print of TheCalculatorStore• Last HP41CL units!• Stay tuned for our next offering• New items in the HP41c corner• Even more memory in a HP15c LE?• A HP 54201D oscilloscope• Prime - news• New HP41c repair kits!• The HP48SX• HP15c LE emulator• The HP82240B Infrared Printer• Another gift idea: the HP85A• Clarification on HP41CL pricing• The mighty HP42s• More on the HP97 - 2 for sale• The new HP41c from Swissmicro• tips on using the HP41c repair kit• HP15c Limited Edition arrived• Card reader repair for HP41c• A nice collection of HP12c in the web• HP infrared printer module• HP Prime settings storing and retrieving• corroded connections• HP17bII+ - more...• How to create your own HP41CL• Error in book corrected• HP 8591E Spectrum Analyzer• Why using a handheld calculator nowadays - part I• Manual for Battery-port assembly• The HP Prime• HHP Eprom programmer in card reader case• More about the HP17bII• New version of wp34s: 3.3• HP 17bII+ vs HP19bII• An attractive moment for calculator lovers• HP15c Warranty repairs• Spice battery cover• Offers on HP Prime old models elsewhere• Two old leather cases for HP calculators - they even had a part number!• Base formulae project• Some speed tests comparing old and new HP 15 LE• New low post part• 16 € reduction in the HP50g Blue• How to replace a HP41c screen• Higher 3D printing prices• New Product: 4 x back case repair piece!• HP17bII+• more pictures of the leather case for the HP Pioneer series.• Updating your HP 41CL• Two more HP41CL assembled• How to really learn more about the Prime• The HP Prime Finance app• Classic AAA charger• ROM upgrade for the HP39GII• HP Prime, BCD and binary• Now TheCalculatorStore is visible on your smartphone• Buying calculators in internet sites• HP Prime• The beauty of RPN• Selling in Pounds!• Absolute beginners' guide to the HP Prime• More on Equations for the HP Prime• You can now order the Battery-ports assembly!• Astronomy for HP Calculators• My configuration for the HP41CL• HP41CL back in!• HP Prime Firmware Update• True leather cases?• Prime• 500 messages!• HP12c• Statistical Distributions in HP Prime• Horses for Courses• New products in development - part 1• Repair service for HP41C• Repair kits back in stock• A new repair method being tested for lower post of HP41c• More speed comparisons for the different versions of HP17bII• Some interesting links for HP Prime• A method to calculate pi based on Pythagoras theorem• 5 dias para el final de la oferta• New Fourier Probe list.• Time module on sale• Comments on HP41c battery repair kit• HP15c• HP Financial calculators• New HP41CLs available• Working with hours, min and seconds in HP Prime• New zebra development!• RPN calculator for Macs• HP Prime -planet orbits• HP 50g vs HP Prime (I)• Black HP17bII• More about the leather case for voyagers• HP41c types of repair• New website logo!• HP calculator repair• HP official emulators• The HP10bII+ - a different animal from previous models• Rechargeable batteries for HP41• Collector's Pack• HP41c upper post repair• Calculator repair - spare parts• Fourier Probes• Classic AAA charger - prototype 2• More on the HP 12c Platinum• The HP41c repair kit is back!• hp41 battery repair pack• An offer on the HP39gII• New HP41CV units!• HP16c compatibility module for HP41C-CL• Some things I did not know about the Spice battery holder• HP instruments coming• A comprehensive HP literature site!• HP54501a repaired• A HP15c reissue - but not the real deal• stop new firmware install!• HP Prime's wireless kit• Types of current HP12c• The life goes on...• News on HP Prime equipment• A HP17bII-type solver for the HP50g• A comparison between HP 17bII, HP 17bII+ gold and HP 17bII+ silver• More information on the HP54501a oscilloscope• New HP Models• RPN and the HP19bII• HP and the educational market• A tip on the HP15c official emulator• Two new old HP19bII• Prime Firmware Comments• HP15c and HP41CL• More about the Multi-Language software for the HP50g• Customizing the HP Prime• Some more blue HP50g• Mac Prime Emulator• hp 19bII - back battery door• HP15c finally arrived to our warehouse• HP Repair book• A penny for your thoughts• Different keyboards in new HP12c• Official Emulator for the HP39GII• HP Prime information sources• If you always envied the young look of your colleague's Casios and Texas...• Prime Emulator• HP15c clone coming back - but now with a competitive advantage!• 3D side cover• The HP41c repair kit stock finished in 4 hours• Woodstock battery bay• More news about the site• Leather cases for most significant calculators• Programming the HP41CL - some comments.• Just received the HP67 !!!• PPC ROM Module• Prime new firmware (II)• Battery bay for classic calculators• Card reader side locks prototypes• Some news on HP calculators• HP1CL is over!• Court success HP15c• Customizing the HP Prime for Business use (II)• new firmware 8151 for HP Prime• The Psion Series 5 - part 1• Tall keys, low serial number HP41CL• HP15c book• HP original Thermal Printer paper• Measure conversion facility for the HP-41CL• New HP-PRIME G2/B1S (2AP18AA)• New articles for this Christmas tree• Facelift!• One more HP15c• HP45 Easter Egg• HP 41c battery bay repair kit• The HP39GII is coming!• EOL HP300s+ !!• New Product: True leather Pioneer case• New video tutorials for HP50g, HP12c• More comments on the HP Prime• Our sister site• And Finally...there are here !!!• New HP50g vs Classic 15c• HP official news about Prime!• New Prime• Battery adaptors for other calculators• A new time module on sale in a few days• new zebra PCB• Monthly closing with the HP17bII - some comments• Buying used calculators - sad stories 1• Prime: some pictures off an emulator• The HP30b• HP12c is back II• New tall keys HP41c arrived, to be converted into HP41CL!• The HP12c Anniversary is now in stock !!• Register arithmetic on the HP15c• Adventures with the HP41CL and the %T function..• The HP41CL - our first conversion• The HP50g as a financial tool (II)• The future of HP Calculators• New modules for HP41CL and some changes• New products and some coming back!• Scientific Calc's Collector's Pack• Battery bay repair piece• tricks for units use in HP Prime• Ran out of HP41CV• Further pictures of the backside repair pieces• HP17bII+• Zebra may go alone• HP Prime versions and Streamsmart 410• Current projects• An important advice concerning Streamsmart 410 and Fourier Probes• Offer HP Prime and other calcs• The TVM formula• New Prime Firmware beta!• HP's own website for the HP Prime• A new product may be coming...• Screen tab menus on the HP Prime• Two new HP 41CL alive!• Number theory and HP Prime• Available Fourier Probes• HP12c Anniversary - European shipment• SmartStream 410 and HP Prime training program• Three new products in the making• Differences between Prime revision A and C• News from Moravia• Classic charger• Old HP calculators and programming quality• HP82104A Card reader repair• HP32sII• Which calculator to take with you on a 2 weeks' holiday?• HP Prime loading program procedure• How I have configured my HP15c for financial duties (III)• second attempt to card reader side lock• Card reader available!• Restoring your HP65• The Prime for solving problems at school - one example close to me• HP 41CL - offer• How to promote Prime (and not only in the school)• Calculators for the Iphone 5• Continuation on new repair aid piece• Different behavior between different number formats in RPN mode in Home• Different colors for the Voyager true leather cases• The HP 41CL Calculator• Battery module for broken calculator backs• Buying second hand• HP50g appreciation• HP15c Limited Edition manual• Use this java emulator...• HP35s Appreciation• Bode plotting app for HP Prime• Just received my first 30b - first impressions• HP41CL and time module• A couple of speed tests and some more comments on the new HP12c• Corrosion on battery contacts• Ownership Pride and Hewlett Packard calculators• HP 41CL Appreciation• Tetris in the HP50g• Possibility of a new product - query to customers• Customizing your Prime for business use (I)• More comments on the HP12c keyboards• HP 300s+ has arrived• HP50g for finance - an engineer lost in a world of hp12cs!• A boxed HP41CL and the HP19bII collectors' set• Base formulae project (3)• Zebras for the HP41c• The new HP10bII+ has arrived!• A new Zebra batch has arrived• A lot of HP17bII+• A new solution for broken back sides of HP41c• Testing card reader side locks• New units coming in• New firmware for the HP Prime• An early HP41C converted to CL• latest HP15c LE vs. HP41CL• Ideas for a HP41c module• HP12c versions• HP41cl no more...• Comments on HP41CL troubleshooting• Final post on statistical distributions on HP Prime• More Fourier Probes for the HP Prime• Where is the sun in the Lofoten Island? Ask your Prime• New springs for HP41c, Woodstock battery case• Prime firmware update 2• The HP12c Platinum• The HP view on education - some interesting aspects• Why have we started producing the Voyager leather cases? or look at HP's late cases disaster!• offers for Black Friday - 3• Finally got a HP27s!• Two units of HP15C - Limited Edition• Clamshell and Pioneer Repairs - first comments• Suggestions for a change in HP17bII+• A tip to use Prime in your business• More random number generator according to different statistical distributions for HP Prime• How I have configured my HP15c for financial duties (IV)• Testing HP41C with oscilloscope• First steps with Smartstream 410 and HP Prime• Ramblings about technical issues of scientific new calculators• A couple of HP97• HP15c book - II• Black Friday - day two: more offers• Calculator repair• The new HP39GII has arrived!!• HP41c case sponges• Back from Holidays• HP17bII as the best all around financial calculator• Transport costs and cash-back offer• Ineresting app for the HP Prime and more Prime software• The amazing HP17bII financial calculator - 1• More news on HP Calculators• Arrived more Spice battery holders• HP SmartCalc 300s review• The HP12c "Gold" is back !!!• Reprogramming a HP12c into an HP15c• HP-IB vintage Lab• Same for the new Sandmath 2x2• A method to calculate Pi using Pythagoras' theorem: one solution for HP41c• Card reader repair• More repair tips for HP calculators• More HP15c• Back to the office!• ...And the same method for the HP Prime!• Success of new HP41c repair methods• Eddie Shore's blog - now video tutorials• Spaces for repair• Assigning percentage keys to the HP Prime• Black and Scholes for the different HP calculators• New batch of springs• 3D Printing link• Time module in HP41CL• HP41c repairs!• CL circuits in!• Screws for Coconut calculators• The new Scientific Calculators from HP - part one• About the HPCC Journal• Screws for Coconut calculators• hp30b and wp34s - disappearing?• HP15CL battery bug• Currency Exchange for the HP41CL• More about the HP41 CL• Equation library program analyzed• RPN or not?• I found it!• ·D printing HP 41c ports• HP17bII as the best all around financial calculator• Back from holidays...• Unknow module overlay• Repair kits back again!• New HP12c set• A trace mode "accountant type" for the HP 50g• HP Prime Firmware Update• Initialization HP41CL - and some problem solving• A half-nut "C" HP41 unit !• More videos on graphical calculators• More HP19bII• The hp Prime at school.• HP12c solver for polynomial expressions• HP Prime pro• New products• Comments on Prime's new firmware• Shipping included for Prime!• The WP 34s is back!• First contact with the HP12c• Date functions for the HP Prime• The calculator as a gift.• Calculators and the MoMA in New York• The HP19BII back door• HP Prime in secondary education• More units of HP41CL• HP12c Anniversary .• Return to the HP 17bII+• Repair of HP41c posts - some ideas• Tomcat battery prototype• Zebras for HP41c• Musings on headphones and earphones• Games for the HP Prime• HP41c Repair book• Repair kit is back• Some press reactions to the HP12c, HP15c reissues• Shady Calculator Stories• New design in for testing• HP 41C repair kit• 3D printing - examples• New Firmware for the HP Prime - version 7820• Considerations on leather cases: the HP41c• Video Tutorials for Prime and 41CL• calculators for travel - some ideas• Repairing the rusting battery bay of HP41c.• News for HP41CL users• The new programming language Swift• wp34s - last donors• Playing with the HP Prime• HP39gII - collectible?• Valentín Albillo's programs ROM (1)• Convert HP15c in a financial calculator - in addition to be one of the best scientific there were!• Some tips on iPad• Clean your HP41c case!!!• HP 15c LE last production run.• WP34s• Sponge for HP41c case• New products coming• Any difficulties in upgrading HP Prime?• The Kinomi Project• HP Prime iOS app!!• HP15c• True leather case for the HP12c• The HP16c Emulator (I)• Just received more zebra circuits• Sandmath 4x4 fix for %T (same as for Sandmath 2x2 previously)• A hint for the HP 41CL• X-Functions and X-Memory• Navigation Pac• An eventful week• The new HP10s+• HP41cl, time module and battery pack• black HP17bII• My other passion• Financial calculators• An emulator for the new HP300s+• New upper and lower post pieces• Guarantee for HP calculators explained• How I have configured my HP15c for financial duties (II)• Interesting units arriving!!!• HP Prime: more information• HP Prime - equation systems basics• How to make your Prime programs not dependent of the HP Prime number settings• I have lost my HP 15c LE !• HP12c out of stock• Another HP Prime site• A repair solution for the back side of the HP41c family• New HP15c LE batch arrived• CHOOSE() menu function for HP Prime• Notice about StreamSmart 410 and HP50g• N.O.S. power supply for HP82240B• First leather case tests for HP12c calculators!!• Function library in the HP Prime - very similar to the HP50g's• The original HP15C: the best HP product ever?• Development priorities• Broken HP41c back repair manual with 3D piece• A couple of audio-related products• screw set for HP41c series• New flashing service• Battery adaptor for Spice series calculators (HP31E, HP32E, HP33R/C, HP34C, HP37E, HP38E/C)• More news on the HP15c...• HP41CL with Time Module• Several HP41cv and cx - Half nut!!• HP12c is back• The HP10bII• New product: 10nF capacitor for HP41c• New time functions in HP Prime• More tutorials for the HP Prime• At long, long last...The HP15c Limited Edition Arrives !!• Use of menus when programming the HP Prime• New Service - second hand equipment market• HP Prime (G8X92AA) available again• HP current scientific calculators• A new product for HP41c repair• The humble HP10bII+• HP Prime - Possibilities at school• A Time module to go with a HP41CL• New HP calculators: HP smartcalc 300s+ and HP10s+• Inverting a Matrix in HP Prime in RPN (basic!)• Why using a handheld calculator nowadays - part II• Statistical distributions for the HP Prime - 2• Classic charger substitution• Repairing calculators• Even more tips on repairing calculators• Charger• Repair in old HPs - things to avoid• Repairing HP old multimeters• Panamatik.de• Tutorials for HP15c• HP 54501a oscilloscope• New products in the web• How to treat your HP Calculator• New firmware for the HP Prime• Voyager cases - how the colors really look• A Casio in HP livery - the HP300s+• hp42s• More musings on the HP 41CL• Calcpad 200 discontinued in our web• Some news• HP vintage calculators prices in Europe• Offers for Black Friday - 1• Feet arrived!• 3D Printing - not good enough!• HP85 memories• HP Guarantee• Base formulae project (2)• Changes in the battery assembly• Calculator repair - Adhesive conductive tape• New Prime, freezing and guarantee• A new watch - and an old one...• A brief description of the HP41CL• New HP41CL batch in production• The HP85 and my 7 year old• Equation library for the HP Prime• Battery pack for HP printers and HP92, HP97 machines• Testing repaired HP41C• New drop-in solution for port and battery connector• A new set of cables available.• HP12c vs HP17bII comparison? Maybe• 3 more HP41cl circuits here!• HP41c models in our website• More about Prime• zebra utilization• First run of Voyager cases finished!• A rare, non HP, ultra-old calculator• Flex circuit installation for the HP41c calculators• New connectivity and virtual Prime calculator software!• HP Prime user keys• The DM-15cc HP15c clone arrived• Change in focus in reference to the HP41CL• Black Friday - day one: HP41cv and HP41cx at rock-bottom prices!• Yet another Easter egg in the HP50g• HP41CL• No HP15c for Christmas• Time functions for HP Prime• Good things coming next year!• HP41c Repair Spree !• The HP10bII+• HP 41c battery bay repair kit• Questions about the new pieces for repair• A curiosity on the Prime and a Time machine module• Broken back piece vs integrated "flat" assembly battery part• Goertz speaker cables• WP 34s just born• Calculator Gift ideas for Christmas• Feet for Coconuts and Voyagers• The HP 41CL is back!• HP Operating Environment limits - HP15c Limited Edition• Scratches in HP calculator screens• Start up a new blog