HP41CX Memory

[Garth Wilson]

I started with a 58c, and soon needed more memory, and was at the right place at the right time to trade it plus $100 for an almost-unused 59 plus printer and a few modules and applications books.  Soon the 59 didn't have enough memory either, and I had programs that would prompt for another card, kind of like disc-swapping, for a program with 1500 steps.  The 41cx was a few years later.