All script applications including forums or virtual stores store their info inside a database - a collection of cells and tables which contains the site info like items, prices, comments, and so on. Every time you open a certain page, the script connects to the database and retrieves the specified data, then displays it. The intermediary software that connects the script and the database is called a database management system and one of the most famous ones is MySQL. The latter is frequently used because it works on different platforms (UNIX, Linux, Windows) and with a range of scripting languages (Java, PHP, Perl, Python), not mentioning its great effectiveness even with big databases. Numerous well-known platforms including WordPress or Joomla use MySQL databases to save their content.