The HP-55 was before my time. I never had one, never considered one and never used one. However, it seems to be the immediate predecessor to the HP-25 and I wondered, “how did we get to this point?” so I looked.

The problem though is: the very few HP-55 emulators that I found, don’t work. I know I’ve said similar things before, but it was true then too. Here’s the problem Continue reading HP-55 Emulator Bug →