A database language for DEC-10' s, used internally by Tymshare, InC.. MAGNUM was designed in the late 1970' s by Dale Jordan, RiCh Strauss and Dave MCQuoid originally, and was written in BLISS-10. It was the world' s first CommerCial relational database. It was in the proCess of being written in 1976. (1995-01-25)