C47 is an open-source, community developed, RPN-based, programmable scientific calculator program which can be installed on the SwissMicros DM42/DM42n hardware along with a custom keyboard overlay. A simulator for Windows also exists.

R47 is the physical calculator offered by SwissMicros in collaboration with the C47/R47 Team, running the same software as C47 but with an all new keyboard layout - ready to go. The software is currently in beta.