PostgreSQL is a sophisticated relational database administration system, that you can use on a number of platforms (UNIX, Linux, FreeBSD, OpenSolaris, Windows) and with various scripting languages (Perl, PHP, Python, Java, Ruby). Due to the fact that it's open-source, it could be easily modified to fit the demands of any developer who uses it. PostgreSQL is also one of the most efficient and secure database systems, with far better performance in handling sophisticated operations when compared with similar systems. It's ideal for large-scale applications due to the fact that a single PostgreSQL database doesn't have a limit for the size, while an individual table may be up to 32 Gigabytes. It's not surprising that a number of business, educational and government organizations are already working with PostgreSQL - Skype, the University of California, Berkeley and the US Department of Labor being a few examples.