My first “calculators” were a pair of slide rulers, one 6” for pocket use, the other one 12” for desk use. Next I added a mechanical (Brunsviga), when I needed 10-digit addition and subtraction, which slide rules did not do. After that, I saw in HP Journal the article about HP 35 pocket calculator and ordered one. Took about 3 months to receive it, but boy - how marvelous it was! When the HP 67 was launched, I got that and donated the 35 to the company receptionist/secretary. Then, I think I got the more pocket friendly HP 11C. At some point I had to handle some binary, octal and hex numbers and added HP 16C. But two calculators in my pockets was not a good long term solution, so i next changed to HP 42S, which I still use to do my tax returns… However, I now have a 15C emulator on my iPad mini, my cell phone, my PC and my MacBook Pro. And, after the 67 card feeder rubber roll went all mushy, I got a 67 emulator for my MacBook Pro. Long live RPN!

This has to be one of the greatest gifts I've ever bought for myself. THANK YOU HP and the Philippians for this awesome classic. I've been waiting for it too long. It was such a huge part of my life getting cat naps in my top shirt pocket. The hardest thing I ever did was selling my first original on ebay. Made almost four times what I purchased it for. The LE had issues and my heart sank but you're forgiven HP for the new LE that out shines the original. Concerning calculators...you ROCK HP...

Finally...a fully functional HP-15C that still fits right into my top shirt pocket. Well done HP and thank you for keeping this classic beauty alive...may it live forever...

I had this one in school, then switched to 41CX. I still have the 41CX and am still using it. Love the RPN.

I just bought this. I had no idea how powerful it is! My first HP calculator was a 12c I bought in the 1990s. I bought the 15c, because I wanted an HP scientific calculator to update and change over from my Casio fx series. I also bought an HP 35s, which I was lucky to pick up new before they ran out of stock and prices sky rocketed.

Greetings from Czech Republic (Europe), where MORAVIA Consulting company is located. (I didn't know this company.) 🙂 I have no experience with HP (only with Sharp and Casio), but I like this one from your video. 🙂 Thank you.

I think that it's great that they are making this, and I will be getting mine soon. Thanks for the excellent (as always) video!

Thanks for a great video. I bought my first HP calculator in 1975. It was an HP 25 and lost all programming when you turned it off (what a pain that was). Later, I bought a 29c and then a 19c. When the 41c came out I bought that as well as the 41cv when that was released. Two further purchases were the 12c and the 15c. I was very interested to hear what you thought of the 15c Collector's Edition as I recently purchased one and I love it. I got a free 39gII with it and that's, hmmm... how shall I put it, interesting. I've sold off all my originals over the years but I find the 15c Collector's Edition does everything I want it to do and at light speed.

This was a wonderful video, thank you!

We need the 16c. No one make programmer calculators any more. I would buy one.

Worth noting that The Calculator Store have 16C overlays and patched 16C emulation firmware now as well as USB firmware flashing cables. The overlay is a high quality rubber membrane which replaces the keycap labels as well as the bezel, but I had to trim it to get it to sit flat, and it is still not ideal (but it would be pretty good if glued down and permanently left in 16C mode). The new firmware does fix the bug shown on the video. I was surprised to find that the programming cable is just a passive adapter and the USB functionality is actually in the calculator. Moravia missed a major trick here: given they were changing the battery compartment anyway, they could easily have fitted a USB-C socket in there opening the possibility of state save/load as well as firmware flashing without needing a special cable. There could have been alternate battery doors with the USB socket exposed or hidden according to taste.

Great video, that's a beautiful calculator!

Great video. But one key difference you did not mention is the fact that the CE has a greenish LCD background, versus the very light gray background of the original. You could also see that difference when you showed the 16C. The light gray background LCD has slightly higher contrast, which makes it even easier to see. I myself am eager to see a 16C CE, and I think it would be fantastic if the LCD background could be made like the original light gray rather than green. While this gripe may seem minor, consider well how much you focus your eyes on the screen. In light of that, small improvements to the LCD would be welcomed.

I love the 15C. I bought the 15C Limited Edition and that thing bricked itself. My old 15C still works.

The keyboard of hp 15c collector's edition is almost the same than the hp 11c calculator. I had the 11c and it was the best calculator I've had. I'll get the new 15c. Thanks for the review.

Thank you...

Great video as always. However as a collector I don't want a collector's edition. I want (and have) the real thing. Especially since you can get an original one in good condition for less than the CE.

I like using the 15.2 mode thanks to the expanded memory.

Scrobot Asaurus's speed comparison videos put the original Voyager series calculators into the mix and I was interested to see how slow they were compared even to other programmable calculators of that general era. Of course, that may have been a tradeoff for low power drain. I had friends who swore by them even in the 90s.

Thanks for your video, as you aware, this are some bugs as found from the HP 15C Limited Edition, a new firmware has been released to solve the pause bug and others; however, a most important thing is that you need a transfer cable to connect between the computer and the calculator, without the said cable, it is no way to upgrade the firmware, but the connected point of calculator is 6 pins, it is hard to find out in the market and it is also impossible to tailor made without the details . Do you have any idea where or how to get one. Thanks for your help in advance.

Wow, it's impressive how much faster the new version of this calculator is compared to the original... amazing that things have changed that much even from something as simple as a calculator, and equally amazing that someone has taken the time and effort to offer the upgraded version for sale.

I still have my old 11C, and I use a modern SwissMicros DM42 (plus Free42 on my phone). So it's tempting, but I can't really justify buying this one.

How long do the batteries last?

I would like to see the 16C

I still use mine, I bought it in 1985 when I was going to engineering school, RPN is the best !

There is a fix for the HP16c bug and there is a rubber overlay for the HP16c available

Are the keys doube injection molded like they were on the original 15C? The chracters on the original 15C keyboard would never wear off because they were molded in, not painted / printed on after the keys were molded.

bom dia, estacalculadora está a venda/ quantocusta?

best calculator ever!

I already own a HP-15C LE, so I bought the CE basically for fun, but I wanted to use it as calculator too. Unfortunately the keys are bouncing - the 1st one with 4,5 (you see it and can correct it) and sqrt (you hardly notice that). I sent it back and got another one. Here the sin-key bounces. I'm really disappointed because key denouncing in software is not difficult - how could they fail with that?

15.2 mode I think is 15 X 2. It has double the registers 96 -> 192.

I wonder how it compares to the 15C LE edition. Cheers

I do not think the 2032 cells are in series to provide 6V. I think they are connected paralelly, so that you can switch them one by one without losing memomry.

Anyone know when or if this will be available in North America?

I want it but I'm from Mexico. The shipping service doesn't cover my country 😑

I feel like there may be enough momentum to bring out a modern school RPN calculator that is inexpensive and meets exam requirements. While this looks like a much wanted product, the name 'collectors edition' hints that RPN will die unless a new generation grow up with it.

The F and G keys look crooked on the 15c

I wonder if the design of this calculator inspired the horizontal orientation of modern smartphone scientific calculators.

Hey just wondering if you were ever in Nuclear Power school? Your voice sounds so familiar to me.

Arrgh, the battery cover is screwed... >_

I got mine. The touch of the keys is cheap-ish and nothing comparable to the original. I guess the software is better, but is this really the point?

Be greedy. Buy the new one for speed and the original for battery life.🙂

I wish they ditch “Collector’s Edition” print. It just looks so tacky.