Thanks for the excellent resources on this site. I've been working my way through the manuals and a programming book.
I desperately wanted an HP-41C in 1981, but lack of money forced me to settle for a TI-59.
This morning I happened across an HP-41CX with a membrane keyboard cover, mag card reader/writer and infared module in pristine like new condition and bought it.
My first question is, why can't I find any reference to the membrane keyboard cover? It works great and the keyboard beneath seems untouched. Is it so common or so rare or has my google-fu failed me?
edit -> found references to the membrane touchpad cover, HP-82200A, online.