I've had my USA made HP-12C since 1987. Got it for my college level finance courses and practically mastered all its functions. I still use the HP-12C almost every day. From routine functions to finance. I especially the appreciate the various "Date" calculation functions.

I am a chemist and I have an 11C in the lab and a 12C in my office, a few other vintage HP calculators at home.

The best calculator in the universe. I purchase my I first on 1981, dent with the years doing Mortgages and Real Estate I purchased 6 during all these years. This is a big lesson to the manufactures of cellulars phones which are made to fail once your contract is up. Thanks HPC12 you made My life easy during all this years

The ones HP built here in the U.S. will last 30 years or longer, but the ones they make today in China are lucky to last 30 weeks.

Fan of the 12c since '82. One of the greatest products ever made. Thank you.

The two calculators that I own are the HP 12c and the HP 50g. I love them!!

I've had mine since 89 and it still works fine. I have never changed the batteries. I am sure of it because I started thinking after about 6 or 7 years of using it that it was odd that the batteries haven't ran down from a lot of usage and although I rarely use it now and then for the last ten years, the batteries are working and in good shape.

I needed a case for my 11c. I looked on ebay and found a 12c with case for $7. The calculator was not working. When I got it, I put in new batteries, reset it, and it works. The calculator is near mint. Ive had my 11c since the 80's.

Brilliant video, my hp48G sadly broke last week - 22years old & used nearly every day - just looking on line for some info on the hp50 I got yesterday and found this. HP's really are the best calculator you can buy - just a shame you can't still get new 48's

I stumbled upon this video, started watching and slowly realized I am watching a presentation by a God of his realm. And he saved the source code. On punch cards (hand written)! With comments!! Best line: "I have all the - uh...Dr. Bill Kahan's descriptions of the algorithms - probably priceless (audience makes "oh" and "ah" sounds in reverence)". Kahan!!!!!

After watching this video you made me want to find and buy one! Damn. I don't have any Voyager in my collection. Great testimony video, love its authenticity.

hp11c and hp12c... best calculators I ever owned. I still have the hp12c, the hp11c got stolen by an "admirer" during a party. I also tried other famous ones like an early Casio (I forgot the name, but if you did a 0 /o division it started a chronometer function), & the TI-59 from Texas Instruments... let's just say that even though the build quality was as good as HP (Casio in Japan, TI built in the USA), both interfaces left a bit to be desired. So I returned them to the store.

Great calculator and great presentation

Enjoyed your presentation - thank you for posting.

I think the design of the 12C is beautiful. The landscape layout makes it different to many other calculators and the gold coloured areas give it a real class. You can imagine Bill Gates using one of these, there is nothing better. My 1983 model is still going strong.

The new ones aren't the same as the ones built 20 years ago. I bought one for my house 5 years ago with very light use (used less than 100 times). Turned it on today and only half the numbers show up on the LCD screen. Looked around to see if there was a fix; apparently this is a very very very common problem with the newer calculators. Mine from high school is still ticking, but the product they make today isn't the same.

lasted 30 years because it is the best made :)

You mean 40 years?

I'm happy that I'm using 12C, building for last not only physically.

I have my 28s for over 25 years... best ever made

Oh, what I would give to read the source code, WITH comments!

are the videos he refers to still available anywhere? That site does not exist on the HP site anymore.

My 12C is starting to bleed at the top of the LCD display. Any replacements available?

I ask the same thing about myself. My 12C is in better shape than I am.

Is it possible to illustrate a deferred payment (5 months for example) on a installment?

I have a HP12C 27 yrs old and it's perfect... did u get it replaced? I also had an HP11C since University, and it lasted over 25 yrs until an "admirer" stole it form my house.

Hi everyone. Does the 12c limited edition (30 year) have a display that blink when you press PV, FV etc? The platinum edition does not, but the original does. Also, how is the key of the limited edition? Thanks

At the end Dennis should have extended his arm and dropped the microphone. Boom.

Anyone recall if there is a backlight in the display? I remember one but I can’t seem to find/remember how to do it.

i still have the 42S, 28S

How long will lump sum last

Today, an excellent HP-42S emulator is available for Android phones. And HP 12C emulators too. In 2024, there is no reason to buy or use HP calculator hardware anymore. It's all on the smartphone now.

12c ou 17b?

weird,actually my 12C keypad is broken down within 6 months

There is an Android application costs $5.5 and you will find this on your Mobil phone so you do not have to carry 2 sets in your pocket.

12C isn't a scientific calculator.....it can be bought for about $10 and that's over priced if you have a phone or a computer.......I found a 25c emulator for my phone....its a ton better than a 12c which I bought by mistake. It was listed as a scientific calculator.....scammed me....I have a HP55 emulator on my computers.

This posting like many others like it are nothing more than propaganda you go to a car dealer or you get a loan from a bank and they’re using the 365/ 365 method there is nothing in the manual about doing a payment based on the 365/365 method, I guess this video is for baby boomers that are retired with a paid off house and a paid off car.