Now that I’ve been using the excellent Swiss Micros DM-41 calculator a while, there are a few things I still tend to forget that are either different than the HP-41CX, or things that are the same that I just never did often enough. The HP-41CX Quick Reference Guide (if you can find one) is really handy, and I’m lucky enough to have an original printed copy in my notebook’s pocket. But there are some specifics to the DM-41, notably the power-on key assignments, that are helpful to have handy.
And thus is born my DM-41 Quick Reference Guide, available under a Creative Commons Share Alike Attributions (CC-BY-SA) license.
It’s formatted to print for trifold to business size, so you can slip it in the business card elastic holder of the DM-41 flip cases.
Edit 20-Aug-2017: Updated to indicate that the cards are available for an SASE.