All script applications including forums or web shops save their info in a database - a set of cells and tables that contains all of the Internet site data like items, prices, comments, and so on. When you open a particular page, the script connects to the database and retrieves the specified data, then shows it. The intermediary software that connects the script and the database is known as a database management system and one of the most well-known ones is MySQL. The latter is widely used as it runs on different platforms (Linux, Windows, UNIX) and with a range of scripting languages (PHP, Java, Perl, Python), not mentioning its wonderful performance even with large databases. Lots of well-known platforms such as Joomla or WordPress employ MySQL databases to save their content.