PostgreSQL is an Object-Relational Database Management System (ORDBMS) that
has been developed in various forms since 1977. It began as a project named
Ingres at the University of California at Berkeley. Ingres itself was later
developed commercially by Relational Technologies/Ingres Corporation.
In 1986 another team led by Michael Stonebraker from Berkeley continued the
development of the Ingres code to create an object-relational database system
called Postgres. In 1996, due to a new open source effort and the enhanced
functionality of the software, Postgres was renamed to PostgreSQL, after a brief
stint as Postgres95. The PostgreSQL project is still under very active
development worldwide from a team of open source developers and
contributors.
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