PostgreSQL is an innovative relational database management system, which can be used on numerous platforms (UNIX, Linux, FreeBSD, OpenSolaris, Windows) and with many scripting languages (Perl, PHP, Python, Java, Ruby). Because it's open-source, it can be freely modified to suit the needs of any developer who works with it. PostgreSQL is also one of the most reliable and secure database systems, with far better performance in managing complicated procedures in comparison with similar systems. It's ideal for large-scale apps because a single PostgreSQL database doesn't have a limit for the size, while an individual table can be up to 32 GB. It is not a surprise that a number of business, educational and governmental organizations are already using PostgreSQL - Skype, the University of California, Berkeley and the US Department of Labor being just a few examples.