PostgreSQL is a feature-rich object-relational database control system, that's renowned for being among the most stable and dependable systems available. It's cross-platform (Linux, UNIX, Windows, FreeBSD) and cross-language (PHP, Ruby, Java, Perl, Python), that makes it universal and a lot of organizations and companies are already employing it for their products or their own Internet sites - just a few examples are Apple, the US Department of Labor, IMDB.com and Skype. The system is open-source and extremely customizable, not mentioning that it is superior to other control systems in terms of handling complex operations. Moreover, the fact that a single table may be up to 32 Gigabytes in size, while the database size is unlimited, makes PostgreSQL a great pick for scalable applications.