PostgreSQL is a feature-rich object-relational database management system, which is renowned for being amongst the most secure and reliable systems available. It's cross-platform (Linux, UNIX, Windows, FreeBSD) and cross-language (PHP, Ruby, Java, Perl, Python), which makes it universal and many organizations and corporations are already using it for their products or their own sites - just a couple of examples are Apple, the US Department of Labor, IMDB.com and Skype. The system is open-source and exceptionally customizable, not mentioning that it's far better than other administration systems when it comes to handling complicated operations. Furthermore, the fact that 1 table can be up to 32 Gigabytes in size, while the database size is unlimited, makes PostgreSQL a fantastic choice for scalable applications.