Marcel wrote on 15-Jan-2018, with regard to HP 41cx Emulator.
Super, vielen Dank, das war mein bester Rechner HP41, HB41c und HP41CX im Gymnasium und im Studium in den 80 Jahren. Brauche den heute immer noch nach bald 40 Jahren. Beste Grüsse aus St. Moritz und Zürich. Marcel Soppla (read...)

Sam wrote on 13-Jan-2018, with regard to Services.
hello sorry I have a problem with my hp prime calculator by mistake using USBTool press the option that says scan, now my screen just says looading in colors do not restart or anything ... please help me (read...)

Checo51 wrote on 06-Jan-2018, with regard to HP Calculator Connectivity Kit for HP 39gII.
Hi Rovamel, Thanks for your reply. I found a Win 7 (64-bit) computer and after many attempts was able to complete a firmware update. At that point the connectivity kit (running under Win 7) could see 39GII content but I could not save any changes to the calc. As the calc was a bit unstable (needed battery removals) I reformatted it. Stability much better now but still unable to save changes to calc content. I went back to my Win 10 computer and now I can change the calc's content and able to do a simple backup/restore, ... (read...)

In replying to Rovamel who on 06-Jan-2018 wrote: I had the same problem (on windows 7). Update succeeded with standalone updater (www.hpgraphingcalc.org/hp39gii.html). Be sure to check the readme file. After update the connectivity kit sees the calc. Good luck!

Rovamel wrote on 06-Jan-2018, with regard to HP Calculator Connectivity Kit for HP 39gII.
I had the same problem (on windows 7). Update succeeded with standalone updater (www.hpgraphingcalc.org/hp39gii.html). Be sure to check the readme file. After update the connectivity kit sees the calc. Good luck! (read...)

In replying to Anonymous who on 23-Dec-2017 wrote: Hi, I can launch connectivity kit but cannot see any calculator content. I'm guessing it finds the calculator because with it unplugged I get a message saying can't find the calculator. The updater programme appears to do nothing at all. Can you help please? I'm using Windows 10, version 1709 by the way.

Anonymous wrote on 28-Dec-2017, with regard to Blaise Pascal - first digital calculating machine.
I'm not surprised to see that you choose to remain anonymous. (read...)

In replying to Anonymous who on 14-Sep-2017 wrote: Pascal did not invent the calculator when he was 18.

Anonymous wrote on 23-Dec-2017, with regard to HP Calculator Connectivity Kit for HP 39gII.
Hi, I can launch connectivity kit but cannot see any calculator content. I'm guessing it finds the calculator because with it unplugged I get a message saying can't find the calculator. The updater programme appears to do nothing at all. Can you help please? I'm using Windows 10, version 1709 by the way. (read...)

ANONYMUS wrote on 20-Dec-2017, with regard to Blaise Pascal - first digital calculating machine.
He really was. For more information, go on youtube and look at Mechanical Computers channel. It's really good. (read...)

In replying to Hi who on 30-Oct-2014 wrote: he was very clever

Arianne wrote on 18-Dec-2017, with regard to MATH MAGIC, The Ultimate Math Challenge.
I don't know where to buy the Math Magic. Could you help me ? (read...)

In replying to Grethe who on 30-Mar-2014 wrote: I realy like this game and I would like to know if I can buy it. I live in Denmark. How much is it.

Jim wrote on 08-Dec-2017, with regard to HP10bii Troubleshooting.
I'm doing a sample test and the answer key tells me what to do. However, I'm still a couple dollars off. They say: Set your calculator for the beginning of the period. Input the following data: PMT = 1,200 (monthly payment) n = 198.72 (number of years between age 65 and 81.56, then multiplied by 12 months) i = .41667 (interest rate divided by 12) FV = 0 (enter 0 for the parameter you are not solving). Hit the PV (present value) button. We find that the present value of the monthly payments is $161,759. Their ... (read...)

Kristian wrote on 08-Dec-2017, with regard to What is TVM (Time Value of Money)?.
It's because P/YR is set to 12 as a default. Hit first 1, then the red/gold shift-key and lastly P/YR-key to set P/YR to 1. You should get -273.32 now. (read...)

In replying to Anonymous who on 14-Nov-2017 wrote: did you find a solution? mine does the same. please can you help, thanks

Kristian wrote on 08-Dec-2017, with regard to What is TVM (Time Value of Money)?.
It's because P/YR is set to 12 as a default. Hit first 1, then the red/gold shift-key and lastly P/YR-key to set P/YR to 1. You should get -273.32 now. (read...)

Edilson Zavala wrote on 05-Dec-2017, with regard to HP Calculator Connectivity Kit for HP Prime.
conectivity kit (read...)

In replying to Wyatt Wong who on 19-May-2017 wrote: HP Prime Connectivity Kit for macOS [URL]en.hpprime.club/software[/URL]

Anonymous wrote on 30-Nov-2017, with regard to How to use an Abacus.
thanks it helped me a lot!:) (read...)

Anonymous wrote on 26-Nov-2017, with regard to Emulator for Windows.
hp long ago user (read...)

Loprophile wrote on 19-Nov-2017, with regard to hp 12c (platinum) - Resetting the Calculator.
Pr Error keeps showing on the display can't get rid of it. What will I do (read...)

Ron wrote on 17-Nov-2017, with regard to HP 18c Business Consultant..
I have heard of one individual who did the same, then replaced the batteries with the correct ones and it worked. . However, I suspect he was extremely lucky. This particular calculator design is nearly impossible to fix. . It is still valuable and can easily be sold. Why? The battery door is valuable to other Hp 18c, 19b or 28c/s calculator users. (read...)

In replying to Rink who on 15-Nov-2017 wrote: I mistakenly put wrong batteries in my old HP-18c. Now it doesn't work. Can it be fixed?

Rink wrote on 15-Nov-2017, with regard to HP 18c Business Consultant..
I mistakenly put wrong batteries in my old HP-18c. Now it doesn't work. Can it be fixed? (read...)

Yasin wrote on 15-Nov-2017, with regard to Download.
give me this set up (read...)

Anonymous wrote on 14-Nov-2017, with regard to What is TVM (Time Value of Money)?.
did you find a solution? mine does the same. please can you help, thanks (read...)

In replying to Anonymous who on 08-Mar-2017 wrote: When doing an ordinary annuity problem, my answers are always wrong compared to my professor's and classmate's answers. Problem: I/YR= 5 N=3 FV=0 PMT=100 Find PV. When I hit PV to find the answer, it comes up as -297.52. Everyone else's answer is -272.32. I've tried resetting the calculator and toggling between Alg/Chain modes. Can someone let me know why this is happening? And a solution?

Anonymous wrote on 08-Nov-2017, with regard to hp 10bII - Resetting.
THANKS!! (read...)

In replying to Anonymous who on 09-Feb-2016 wrote: Hi! So i had the same problem with the factory setting of 10bii+. Its because its calculating as monthly instead of yearly. If you would like to change that press 1, red down shift, and p/yr (the pmt button). If you want to revert back to monthly, 12 periods per year, press 12 instead on 1 in the instruction above.

Robert wrote on 05-Nov-2017, with regard to HP 10bII+.
Does anyone know where the CPT button is or equivalent (read...)

Tshilidzi wrote on 04-Nov-2017, with regard to hp 10bII - Resetting.
My calculator displays 3 zeros and the downward and upward sign on the screen. Thats all it displays, the bottons are not working. I tried everything in terms of resetting it nothing works help. (read...)

Richard wrote on 03-Nov-2017, with regard to HP50g Calculator Connectivity Kit (CONNX4) also for HP48, HP49.
Any updated connx4 for windows 10. I can't run the available HPCalculatorUSB setup. (read...)

Ton wrote on 03-Nov-2017, with regard to HP Calculator Heritage.
Dear Madeline, few years back I spoke to you about replacing my 41CV. You referred me to Monica and I got a 17bll+; 48gll; 50g and several 12c. The HPs are great calculators (especially with their RPN feature) but they all seem to share a common problem: their pouches falls to bits over time. May I know what materials are they made of and what can I do about it; especially when we need to bring them out of our home or office? Thank you! (read...)

John wrote on 31-Oct-2017, with regard to HP 10bII+.
how do you calculate covariance (read...)

KGB wrote on 27-Oct-2017, with regard to Download.
15651612160 (read...)

Anonymous wrote on 27-Oct-2017, with regard to HP 18c Business Consultant..
seriously? (read...)

In replying to Ron Ross who on 09-Apr-2013 wrote: The Hp 18C (and 19B, Bii, 28c and 28s) all use N cell batteries. These are 1.5 Volt and NOT 12V like some garage door controllers use that are very nearly the same size and dimensions. Of course if you use the 12 Volt batteries (and more people have done so than I care to count), you put 36 Volts where only 4.5 volts is designed and you (not you, but others) ruin the fine vintage calculator. Remember N cell, often called instrument batteries. Usually these batteries are on the costly side of $5 per pair ...

Anonymous wrote on 20-Oct-2017, with regard to Abacus Simulator.
Henlo (read...)

Anonymous wrote on 20-Sep-2017, with regard to Charles Babbage .
I hATE YOu Suarez (read...)

Person wrote on 20-Sep-2017, with regard to Charles Babbage .
you are retarted (read...)

In replying to Your Mom who on 06-Feb-2017 wrote: Get spell check Mark!

Anonymous wrote on 17-Sep-2017, with regard to Leonardo da Vinci - first conceived mechanical calculator .
tuch my penez (read...)

JordiP wrote on 17-Sep-2017, with regard to hp 10bII - Resetting.
Hi. After three or four years without batteries, I replaced them. Then, my HP-10B appeared dead. I followed the restoration process: finally the message ALL Clr appeared, but the machine did no operate at all. I performed the selfverification routine without success: at the fourth or fifth button appears the message 10 - Fail 8. Then I need to shortcircuit the batteries contacts to reset. Otherwise, the machine rests as dead. Where can I send the calculator (in Spain) to technical treatment? Thks a lot. (read...)

Shani wrote on 16-Sep-2017, with regard to HP10bii Troubleshooting.
My hphone calculator is calculating the npv and irr wrong what is the problem my battery is also running low pls explain (read...)

Bernard Rousseau wrote on 14-Sep-2017, with regard to HP 42 S RPN Scientific Calculator.
Hold EXT and press + (read...)

Anonymous wrote on 14-Sep-2017, with regard to Blaise Pascal - first digital calculating machine.
Pascal did not invent the calculator when he was 18. (read...)

Anonymous wrote on 14-Sep-2017, with regard to Charles Babbage .
word (read...)

In replying to Anonymous who on 09-Aug-2016 wrote: this not helpful at all

Ammar wrote on 14-Sep-2017, with regard to Evergreen Stationary.
i need hp calc 200 + numeric pad (read...)

Bob Reeves wrote on 09-Sep-2017, with regard to Emulator for Windows.
have micro soft 10 can't get HP 41C on my desktop, had it on XP7 was great. (read...)

Anonymous wrote on 07-Sep-2017, with regard to HP 39gs the best graphing calculator for students.
I'm interested in how to program something: (2A + B) * 5 = then I enter values ​​A, B and I have the solution of the equation (read...)

Anonymous wrote on 07-Sep-2017, with regard to HP 39gs the best graphing calculator for students.
I'm interested in how to program something: (2A + B) * 5 = then I enter values ​​A, B and I have the solution of the equation (read...)

Anonymous wrote on 04-Sep-2017, with regard to Blaise Pascal - first digital calculating machine.
is a pascaline calculator a computer according to the Turing model (read...)

John Ferman wrote on 02-Sep-2017, with regard to HP 50g.
Does the 50 come with printed manuals, what kind of batteries are used, I have a 128 Kb card in my 48GX - is that passé. What are the prices, EduCalc sell. (read...)

Tiffany B wrote on 02-Sep-2017, with regard to HP 10bII+.
Where is the CPT button or how to get CPT? - I am dealing with simple discount rate, number of periods problems and need this button for calculations. (read...)

Anonymous wrote on 01-Sep-2017, with regard to hp 12c (platinum) - Changing the Display from a Comma to a Decimal Point.
The instructions did not work for mine also! (read...)

Celine Chew wrote on 30-Aug-2017, with regard to MATH MAGIC, The Ultimate Math Challenge.
can i know how to buy this game? i live in malaysia (read...)

Anonymous wrote on 23-Aug-2017, with regard to hp 20b - Performing Complete Self Test.
just buy a new one. (read...)

In replying to Lealyn D. Louis who on 13-Sep-2013 wrote: Good evening! I just bought my hp 20b last wednesday september 10, 2013 but i only opened it tonight. I pressed the On button like what the Quickguide said but it won’t turn on! is it really like that?or something to do with the battery? I really need to use it for my Finance subject. Please help.Thanks

LWS wrote on 20-Aug-2017, with regard to Kent Ridge - NUS Co-op Store.
Looking to buy a HP 12C Platinum financial calculator. Is it available at the store in the store at Bugis Jcn or Westgate? (read...)

Darwin17 wrote on 18-Aug-2017, with regard to HP Calculator Connectivity Kit for HP Prime.
HP Prime Connectivity Kit for 2017 7 10 (12066) (read...)

Anonymous wrote on 17-Aug-2017, with regard to HP 18c Business Consultant..
i understand i need 3 times 1.5v batteries , is it enough or do you have name four that : example Duracell and so on (read...)

In replying to Ron Ross who on 09-Apr-2013 wrote: The Hp 18C (and 19B, Bii, 28c and 28s) all use N cell batteries. These are 1.5 Volt and NOT 12V like some garage door controllers use that are very nearly the same size and dimensions. Of course if you use the 12 Volt batteries (and more people have done so than I care to count), you put 36 Volts where only 4.5 volts is designed and you (not you, but others) ruin the fine vintage calculator. Remember N cell, often called instrument batteries. Usually these batteries are on the costly side of $5 per pair ...

Anonymous wrote on 17-Aug-2017, with regard to HP 18c Business Consultant..
i understand i need 3 times 1.5v batteries , is it enough or do you have name far that example Duracell and so on (read...)

In replying to Ron Ross who on 09-Apr-2013 wrote: The Hp 18C (and 19B, Bii, 28c and 28s) all use N cell batteries. These are 1.5 Volt and NOT 12V like some garage door controllers use that are very nearly the same size and dimensions. Of course if you use the 12 Volt batteries (and more people have done so than I care to count), you put 36 Volts where only 4.5 volts is designed and you (not you, but others) ruin the fine vintage calculator. Remember N cell, often called instrument batteries. Usually these batteries are on the costly side of $5 per pair ...

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