KanceptI was there Gandalf, in the 90s.
I have fond memories of using this calculator growing up. It’s been stolen on several occasions from my father during moves and he’s replaced it just as many times.
When he passed, it was one of his things that I wanted, but it also mysteriously disappeared.
I purchased my own today and am happy. It’s not the calculator my father used, but it’s still a first gen 12C and it brings me joy.
JackFound a second #HP12C while out thrift shopping, a later model made in Singapore. I keep hunting for one of the older scientific models with the molded rather than painted keys, but still fun to find another. The top one is today's find, a '93 from Singapore, the bottom an '86 from the U.S. #AlwaysBeThrifting
Stefan Wolfrum 
YAY! Successfully upgraded my > 10 years old HP-12C's firmware to the new 2025 version which now allows to dump and restore the calculator’s memory via cable to/from my Mac. 😊 #calculator #hpcalculator #hp12c #firmware #hewlettpackard – To see your HP-12C’s firmware version: When the calc is off hold g & ENTER and press ON. Then press 2 to see the checksum, press any key to see the date, again any key to see a copyright notice, again a key to return to the 1.L 2.C 3.H menu. Press ON to exit. 😉
Alastair Bor 🇦🇺Meh… my RPN calculators never had a C button (that was used like that) either. https://www.theatlantic.com/technology/archive/2024/10/iphone-broke-its-calculator/680271/ #hp12c #hp11c #hp15c #hp16c
Rich Tong ❤️🖥️@cassandracorvid @Gartenberg me too. Still use on my iPhone and I discovered I have three #hp12c at home!
Ed SI was about to say, surely you can't object to the HP-16C!
The first HP calculator I bought was the limited edition 15C - I seem to have picked up some more since then.
There are lots of in-browser emulators, some of which function as webapps - see
https://github.com/fcambus/jsemu/blob/master/README.md#microcode-level-calculators