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)