New user setting up HP 41CX

[Les Bell]

(01-17-2014 04:17 AM)Dave Frederickson Wrote:  If I have a, c, and d then why do I need the card reader, other than portability?

Apart from "mass" storage, the only other thing the card reader provides is HP-67/97 compatibility. It can read HP-67 program and data cards, and adds some instructions from the 67 instruction set - useful if you have any 67 application pacs or want to run other 67 programs without some manual translation.

That's about it.