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?

Anonymous wrote on 16-Nov-2017, with regard to Blaise Pascal - first digital calculating machine.
boo (read...)

In replying to Anonymous who on 12-Nov-2014 wrote: yes he was

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 26-Sep-2017, with regard to Blaise Pascal - first digital calculating machine.
slippery (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...)

Anonymous wrote on 11-Sep-2017, with regard to Blaise Pascal - first digital calculating machine.
because the thing s he did (read...)

In replying to BOBS YOUR DAD who on 11-Sep-2017 wrote: why was hitler a bad person

BOBS YOUR DAD wrote on 11-Sep-2017, with regard to Blaise Pascal - first digital calculating machine.
why was hitler a bad person (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 ...

Anthony Martin Chhu #1717 Member wrote on 13-Aug-2017, with regard to HP 50g 3rd Party Software.
Am looking for a old star trek game for my hp50g (read...)

Neetu wrote on 11-Aug-2017, with regard to Kent Ridge - NUS Co-op Store.
Hi, I am looking for HP10BII Financial calculator. is it available with you? (read...)

Neetu wrote on 11-Aug-2017, with regard to Kent Ridge - NUS Co-op Store.
Hi, I am looking for HP10BII Financial calculator. is it available with you? (read...)

Zin Mar wrote on 10-Aug-2017, with regard to Buy HP Calc In Thailand.
Dose Bangkok branck has HP 15C / 35S Calculator in stock? (read...)

Anonymous wrote on 08-Aug-2017, with regard to Calculator is ok till I changed its batteries.
My hpbii+ calculator keeps switching off when I use it. I know it's not the battery as the symbol doesn't show. What could be the problem? (read...)

Innocentia wrote on 06-Aug-2017, with regard to hp 10bII - Resetting.
My Hp10bll+calculator first showed a battery sign with a small mark inside I assumed it meant low but I haven't bought new ones, few days down the battery sign disappeared Now if I press a zero it shuts down what am I supposed to do? (read...)

Alex wrote on 06-Aug-2017, with regard to hp 12c (platinum) - Changing the Display from a Comma to a Decimal Point.
There is other way? my HP12C Don`t change with this procedure (read...)

Luiz wrote on 20-Jul-2017, with regard to HP 39gII Manual.
boa calculadora (read...)

John wrote on 19-Jul-2017, with regard to Sim Lim Square - Perfect Watch.
I am thinking of visiting your shop in Sim Lim this coming Saturday July 22nd, to buy a financial calculator. Could you tell me which HP ones you have in stock and whether you also have Texas Instruments calculators in stock ? Thanks and regards. John (read...)

BartDB wrote on 18-Jul-2017, with regard to HP 50g Equation Library Update for ROM 2.09 (92).
Hi all who visit here: Please download the files from HPCalc.org: www.hpcalc.org/details/6515 Note that the hpcalc.org file contains a newer version of the EqLib file and also includes the periodic table (not included in the download on this page). Best regards, Bart (read...)

Musa Xulu wrote on 18-Jul-2017, with regard to HP 50g Equation Library Update for ROM 2.09 (92).
I would like to know where i can download equations library(226-227-229) for my HP 50g because as i deleted mine one bcos i needed some space and i kept it in the memory stick for future use but now the memory stick is corrupt and i cannot access my library. Could u pls help. (read...)

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