PostgreSQL is a sophisticated relational database control system, which you can use on a variety of platforms (UNIX, Linux, FreeBSD, OpenSolaris, Windows) and with a variety of scripting languages (Perl, PHP, Python, Java, Ruby). Since it is open-source, it can be easily modified to fit the demands of any developer who uses it. PostgreSQL is also amongst the the most reliable and stable database systems, with much better performance in managing sophisticated operations compared to similar systems. It's ideal for large-scale apps because a single PostgreSQL database doesn't have a limit for the size, while one table may be up to 32 GB. It isn't surprising that lots of business, educational and governmental entities are already employing PostgreSQL - Skype, the University of California, Berkeley and the US Department of Labor being just a couple of examples.