My husband’s mother gave one of these with a booklet, its crazy at how instructions use to be so much more informative back then and its been quite useful.

I have had my HP-12C for over 35 years and It works great for me. I realize that the newer models may be faster, but my Gold HP-12C has never let me down. In conclusion " IF IT AIN'T BROKE DON'T FIX IT " !

When I was an engineering undergrad in the mid 1980s the HP 41C and its variants were the kings and I cherished mine, using it until it got stolen in the early 2000s. There was also a business school on campus and all those people had the "other" calculator, the 12C. Everyone, and I mean EVERYONE, had one.

I purchase my 1st HP! in 1981. During the years of my Mortgage and Real Estate profession I purchased 6 units. I love it.

I bought the original 12-C in 1984 and almost 40 years later, I'm STILL using it.

I still have my HP12C from 1987. It still works well although I don't have much need to use it now. Memories of doing Internal Rate of Return, Ne Present Value and Discount Rate calcs come flooding back!

The only RPN calculator you can be confident carrying around with you without worrying about it being stolen (as all the others are just really damn expensive)

Thank you for the great summary

Thanks for making this video!!!

12C is a Companion for 20+ years. I like Sales calculation and Depreciation which is very quick.

Thank you for posting this review. Very helpful. A+++++

I much prefer the original design HP branding, a nod to the legend, I've just ordered a 12C platinum (platinum/black model) getting too many migraines working with large numbers in my head trading and the 12C has some very handy functions for trading and fits in my pocket! cant wait for it to arrive!

I found a 12c on the road. Must of fallen out of someone’s bag. I work at an accounting firm. When I picked it up it must of been runner over several times. I found the battery cover. Latter I installed new batteries and it turned on. I did several calculations and it still works perfectly. It’s from 1982.

Like you, I'm not a fan of gold things, but the 12c was my first HP calculator with RPN. I got it in the late 1990s, which is exactly like the original from the '80s. I love the RPN, the simplicity, and I don't care that it's a bit slow. It's an awesome piece of kit and history.

Good review, i noticed 2 versions of platinum 12c, one has hewlett packard at the bottom, other one same as blackkeyboard but hewlett packard is missing. so which is very latest one.

Nice video and a Make that I couldn't afford back in the 70's - so just got myself a 12C just now for nostalgia reasons. The hand movements for the calculation are quite quick so here they are broken down (if you want to test out your own 12C to make sure it works okay). 50000 CHS [g]CFo 12000 [g]CFj 5 [g]Nj [f]IRR Should give the answer 6.40 Hope this helps. ... Where [g] is press the blue 'g' - but release before pressing next key.

Something you did not mention about the Platinum series is that internally it has two more significant digits of precision. You can show that by doing a calculation that has >12 decimals (e.g. 1/3), subtract 0.33333 from it and show the "prefix" it will show 7 significant digits. This can matter of your calculations involve high precision requirements. Although, most financial calculations, are down to the cent and rarely above millions in private property calculations.

I recall Scrobot Asaurus's big speed comparisons of different programmable calculators running the same simple algorithm always have the original HP Voyagers coming in as the slowest of the lot, really amazingly poky. But for many purposes, it doesn't matter that much and they're just so physically well-designed.

Thumbs up to your video! Which keyboard tactile feel is the best? The latest HP 12C Platinum sucks as I had several misses on it and gave up. The original 12Cs seem to have the best tactile feel and much quieter as well. Anything from 2005 and beyond seems clicky and mushy. The 25th and 30th Ann ones that I have seem to be Ok but still not as good as the original that I have from earlier. There are so many different versions and probably same versions made out of different countries that the 12C comes like an assorted box of chocolates and hard to tell what is good at what! Mind boggling!. By the way, the stack shift behaviour that you referred to is probably because when you hit the CHS key it is like hitting the enter key and it pushes the -5 to the Y register .. and then when you enter 2 + .. the answer comes out as -3. Everytime we hit Enter the number on the display gets put to register Y .. so I am suggesting that when you hit CHS the same could be happening. Cheers.

4:30 Can anyone please tell me what the little figure to the left of the battery means? It has three circles and includes the text "871B", which I can not find on any battery chart.

How does the keyboard on both modern 12C and 12C Platinum calculators feel (keys' action clicks) and compare to the old 12C and 48G, both of which have a very solid, robust and satisfactory "click" feel when operating the keys. Is the keyboard on the modern ones on par with the old ones? Or is it weaker, of less quality? Thank you!

I have both IOS apps (12c, 15c) and physical calculators (12c, 35s) originals from hp. Software versions are fast, but I have to buy the iPhone 12 Pro Max (for size) to enjoy using the apps. Hovever, the feel of real calculator keyboard clicks is so much more assuring. My only complaint is the blue-colored shift key functions are a bit hard to see in low light in the physical units. Nevertheless, it’s nice to have the soft apps as backups.

I prefer (by far) the classic 12C (the golden one). Nothing compares to the pleasure of obtaining results on a classic calculator dedicated to finances, in an elegant, sober design that leaves others perplexed. In addition, the only RPN mode, means that few people can understand its operation.

Not a bad start at least I knew a fastor 12C in gold existed but I think need to go more in depth , ebay is awash with dodgy junk. I found elsewhere that you can get a 12C with the same model number as the limited edition 12C. HSTNJ-KN05. And the one to avoid is the one with bad percentage sign and " slightly duller and less-legible shades of orange and blue paint for the f and g functions" it has badly shaped o's tall and narrow versus nice and round the HSTNJ-IN04 is a bad one found someone with one failed within a year. Plus of course dual CR2032 batteries that keep all your settings very useful indeed.

I'd be curious to see if there are any differences in their ability to solve some of the really tricky tvm problems.

The stack behavior of the 12C plus appeared to be the same as the original yielding -3.00 NOT the same as the platinum silver behavior as you mention in the video. Or am I misunderstanding something? Also.. the new 12C is made in China vs. the original being made in the US. Do you notice a difference in feel (button press) and/or quality?

Is the upper silver band (which contains the calculator screen) on the 12C Platinum made of metal (aluminum / stainless steel) or plastic? On the old 12C ones it is metal (it looks brushed brass), but I'm not sure on the modern 12C Platinum... ¿?

Hooo now I undrrstand the reference !

My HP 12C from the 1980's will not work, with new batteries, it just quit one day. Any ideas how I can Jump Start it? I love using it in real estate, shopping, bill paying, calculating complicated math problems, etc. HELP! I miss using it! Thank you for this presentation.

Can anyone tell me why sometime using the PMT number in a new calculation will throw the number off by a few cents.. thanks in advance.

Got an original from my grandpa. Gotta get new batteries today

Is the 12c better or the 12cp? Need it for a class. The 12cp is cheaper

i carry the platinum black with me everywhere i go.. some people that know i have it ask why i dont just use the calculator on my phone, when the phone cant do what this can.. ive used rpn for so long now, its actually difficult to use an ordinary calculator like the phone or you would find in an office.. plus these things are tanks, nokia phone level tough lol

Do you sell this calculator? I am not getting it in India.

Tenho uma prestige, mas acho a platinum mais bonita, apesar de ambas mudarem apenas o exterior. Parabéns pelo conteúdo.

For PLATINUM: 5 ENTER CHS 2 + 😄

You will like programming in 4th

Saya mau jual ni