The 1979 HP-41 series programmable calculator, which was produced until 1990, and was used in the Space Shuttle missions, has a processor called "Coconut" (or 1LE3 CPU), RAM, ROM, I/O, and uses the interpreted programming language FOCAL ("Forty One Calculator Language"). The operating system and the interpreter are stored in ROM, and were programmed using the Coconut processor assembly language also called MCODE (or "M-Code").
The site is a repository dedicated to the preservation and sharing of software and documentation for classical computer systems, including a wide variety of classical computer systems and their software, such as the CP/M operating system. The site hosts software and documentation of all types for classical computer systems, providing a valuable resource for enthusiasts and researchers interested in retrocomputing. Maintained by classiccmp.org community.