All script applications including forums or online shops keep their info inside a database - a set of cells and tables that contains the Internet site information including items, prices, comments, etc. Every time you open a particular page, the script connects to the database and retrieves the specified data, then shows it. The mid-level software which 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 as it operates on different platforms (Windows, Linux, UNIX) and with a variety of scripting languages (Python, PHP, Perl, Java), not mentioning its great functionality even with massive databases. Numerous widely used platforms like WordPress or Joomla™ use MySQL databases to store their content.