PostgreSQL is a high level relational database control system, which you can use on many platforms (UNIX, Linux, FreeBSD, OpenSolaris, Windows) and with many different scripting languages (Perl, PHP, Python, Java, Ruby). Due to the fact that it's open-source, it can be easily modified to match the requirements of any developer who uses it. PostgreSQL is also one of the most dependable and secure database systems, with better functionality in managing complicated operations compared to similar systems. It is suitable for large-scale applications since a single PostgreSQL database does not have a limit for the size, while a single table could be up to 32 Gigabytes. It's not a surprise that many business, educational and government entities are already using PostgreSQL - Skype, the University of California, Berkeley and the US Department of Labor being just a few examples.