An active DBMS developed at the {University of California at Berkeley} by a team led by Michael Stonebraker (1986-1994).Postgres was later taken by Illustra and developed into a commercial product, which in turn was bought by Informix and integrated into their product, {Universal Server}.PostgreSQL is a further development of the original POSTGRES code as a free software alternative to commercial DBMS vendor offerings.[Details?Reference?Relationship to Ingres?](1999-07-04)