mSQL
mSQL or Mini SQL is a lightweight database management system from Hughes Technologies.
In 1993–94 David Hughes developed a network monitoring and management system called Minerva The design of this system required a database management system to store its configuration and working data. To enable future portability, Hughes elected to use an SQL interface between the application and the database management system, despite the fact that at the time there was no free or inexpensive SQL database management implementation available. Hughes therefore developed a translation program which provided an SQL interface to the free Postgres DBMS (which did not use SQL). This product was named miniSQL, or mSQL. In time it became clear that Postgres did not perform adequately on the low-specification systems used to run Minerva, so mSQL developed into a lightweight database management system in its own right, implementing a limited subset of the SQL standard, but performing well on minimally specified hardware.