PostgreSQL is a high level relational database administration system, which can be used on numerous platforms (UNIX, Linux, FreeBSD, OpenSolaris, Windows) and with many different scripting languages (Perl, PHP, Python, Java, Ruby). Since it is open-source, it can be effortlessly modified to suit the requirements of any developer who uses it. PostgreSQL is also amongst the the most trusted and stable database systems, with far better functionality in handling complicated operations compared to similar systems. It's suitable for large-scale apps 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 GB. It is not a surprise that lots 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.