PostgreSQL is an advanced relational database administration system, that you can use on many platforms (UNIX, Linux, FreeBSD, OpenSolaris, Windows) and with various scripting languages (Perl, PHP, Python, Java, Ruby). Since it is open-source, it can be freely modified to suit the demands of any developer who employs it. PostgreSQL is also one of the most reliable and secure database systems, with much better performance in managing sophisticated procedures compared to similar systems. It is ideal for large-scale applications since a single PostgreSQL database does not have a limit for the size, while one table can be up to 32 GB. It isn't a surprise that a lot of business, educational and governmental entities are already working with PostgreSQL - Skype, the University of California, Berkeley and the US Department of Labor being only a couple of examples.