I own, love and use three of these - a HP 11C, a HP 41CV, and a HP 41CX. All working fine. However, mostly I use the following IOS app, in today’s life:
App name = i41CX, in case anybody is interested.
I love HP calculators, have several emulators and simulators on my phone (Emu48, Emu42, Free42) and here in the drawer of my desk some real HP calculators (HP 48G with extended memory, HP 39gs with newRPL).
Still have my Palm m500 and Zaurus SL5500, but both in non working state (bad battery and failed firmware modding) – @ToyKeeper If you have any hints where to get a good firmware for the Zaurus or an advice where to start with modding the m500, please tell me.
It has been so long, I’d have to start over mostly from scratch. I recall the Zaurus was a pain because it’s meant to run Opie, the Qtopia-based distro… but Qtopia wasn’t good. So I installed a X11-based distro called GPE. It ran a window manager called Matchbox, IIRC, plus a browser called Dillo, and a bunch of python-gtk programs I made.
As for the m500, I installed most things normally, but I think I also put some stuff in ROM using a program called Romeo? I forget. It also helped a lot to have LauncherIII 3.0.6, to make programs work from a SD card.
I have a bunch of old files and backups still, but I wasn’t great about keeping it organized or documented, so it’s a bit of a mess. I keep much better records now, but that doesn’t help with older stuff like this.
The old HP48 hasn’t really been used in ages. It still works, but it’s a lot more convenient to just use an emulator on my phone… or pull up a terminal and use python as a calculator.
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Ooooh oooooh I also like calculators! I’ve got an HP 41C coming, I’ll be trying to restore it and get it working. Most interesting ones I have at the moment would probably be the Sharp EL-9600C that for some reason includes a resistive touchscreen, my daily driver the Numworks running Upsilon FW (go open source!), and my mum’s old Sharp EL-508A. I used to own an HP 40gs with CAS though that one unfortunately got stolen.
It’s extremely rare for me not to have emacs already running, so Emacs calc has been my default at the computer for a lot of years. It’s a lot more RPN and HP-like than Python, and for me it was a real relief to give up dc after I found M-x calc.
Mathematics frightens and confuses me. Haven’t owned a calculator since 1991 and I’m doing fine.