I’m delighted to learn you can still buy an HP 12C calculator, the one I use all the time. As a long-time HP employee, back many years ago, I’m hooked on RPN calculators. I’m part of the “diehard fanbase” that @hackaday wrote about yesterday. I even have a 12C emulator on my iPhone, because using a “normal” calculator just confuses me.

https://hackaday.com/2026/09/02/im-not-dead-yet-reverse-polish-notation-calculators-you-can-still-buy/

To quote that piece: “People who like RPN tend to really like RPN.”

#HP