And for a different but convergent take on the same approach to this problem space, here's the Pick Operating System, which evolved for business applications o

And for a different but convergent take on the same approach to this problem space, here's the Pick Operating System, which evolved for business applications on minicomputers in the 1960s, along similar lines (global hash table database, built-in language): https://en.wikipedia.org/wiki/Pick_operating_system https://en.wikipedia.org/wiki/Pick_operating_system MUMPS can thus be seen as a member of a (loose) family of 1960s era systems.