The final version of eXpOS (eXperimental Operating System) (28 stages).
oureXpOS has stage-wise versions of the project.
eXpOS is a small operating system written from scratch. The eXpOS runs on a simulated string machine called XSM (eXperimental String Machine). The OS is programmed using a custom language known as SPL (System Programmer's Language) and application programs, which run on the OS, are programmed using Expl (Experimental Language).