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The HP41 Corner
• HP 41C Repair
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• HP41c Card reader
The HP Prime Corner
• Quick Start Guide
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• How to load programs or apps in the Prime
• Unboxing the HP Prime
The HP15C corner
• Financial Programs for the HP15c
• HP15c new self test
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The HP12c Corner
• How to use Time Value of Money - Loans
• HP12c_vs_Platinum
Documents
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• why RPN? - and how to use it
• Assorted Calculator related documents
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• HP15c Tutorials
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• Diverse DIY
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• HP41c service module manual
Software
• Software for HP12c
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• Software for HP 35s
• Software for HP 41c/cv/cx
• Software for HP 41CL
• software for HP39gs/40gs
• Software for HP50g
• software for HP42s
• 50g Graphical Calculator
• Emulators
• Software for HP39GII
• Software for HP Prime
Calculator Resources
• Calculator Repair
Calculator blog
• 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
Blog in Spanish
• Anteriores versiones de la HP Prime y Smartstream 410
• Atajos en la HP Prime
• El HP85 (continuación)
• El firmware de la HP 15c
• El sistema RPN - una primera introducción
• La HP41c
• Mi otra pasión
• Pi mediante teorema de Pitágoras
• Pi por teorema de Pitágoras: una posible solución para HP41c
• Primera entrada del blog en Español
• ¿Si buscamos Pi por el exterior?
• Un sistema de medición con la HP41cx
• ...y otra solución para la HP Prime

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