If you want a recreation:

https://www.swissmicros.com/product/dm41x

They also have their own versions of the 15c and so on. I have 3 different models (and one original HP RPN calc) and can confirm they are really high quality. Again though, spreadsheets are a lot more useful to me when I have more than just a simple calculation or two. I think these are mostly getting picked up by hobbyists, collectors, and those who work in labs and need a dedicated device with physical buttons.

Note that it doesn't have the big expansion pack things that I think the 41c came with if I'm thinking about the right calculator.

I've been really tempted as my 41CV doesn't work any longer but I do real calculating so little that it would just be a nostalgia trip. (And I have a couple of the horizontal format HP calcs that still work for any of the calculator stuff I do sometimes do outside of an app.)

Yeah, for me it's mainly a hobbyist thing without much value at this point (probably better uses for my money). I'd love to have something like the 15c with a much bigger screen that does APL with physical buttons. Now that would be cool. I effectively have that on a tablet though (minus the dedicated system with physical buttons).

That link made my day! Thank you. From what I read, their builds perform better than the originals, and they even make landscape versions. Woo hoo! RPN rules in my book. I picked up an HP 32 before they were gone forever, but I've been afraid to use it. It's great to know about SwissMicros; they'll get my business soon.

Not a problem.

I have their DM42 and it feels good in the hands. The case is solid metal too and the screen is nice. I believe the performance is better than the originals (not hard as some of these were sold before my birth and I'm not exactly a spring chicken anymore) and they fixed several bugs.

Plus, for owners of the HP41, if you had an essay question in your chemistry test you could type in cliff notes... Naw, I never did that.

I did do that! But data entry was so laborious that by the time you entered the formulas you basically knew them by hard.

A decent way to cram for an exam you don't care much about is to hand copy the course material too. You'll most likely end up retaining enough to pass.

OK I always see this sentiment.

Can someone show something useful in RPN? House odds on 3 on roulette, or don't come odds for 10; or the standard deviation of 1, 1, 1, 1, 7, 29.

I have never seen anyone show an example more complex than 2 2 12 + * or whatever it looks like.