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.
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POSTGRES has been used to implement many different research and production applications. These include: a financial data analysis system, a jet engine performance monitoring package, an asteroid tracking database, a medical information database, and several geographic information systems.
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In late 1996, we changed the name of the database server from Postgres95  to POSTGRESQL. It is a mouthful, but honors both the Berkeley name and its SQL capabilities. We started distributing the source code using remote cvs, which allowed people to keep up-to-date copies of the development tree without downloading an entire set of files every day.
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