PostgreSQL is a powerful, open source object-relational database system. It runs on all major operating systems, including Linux, UNIX (AIX, BSD, HP-UX, SGI IRIX, Mac OS X, Solaris, Tru64), and Windows. It is fully ACID compliant, has
full support for foreign keys, joins, views, triggers, and stored procedures (in multiple languages).
More information is provided in the following table.