BBcode is a short but concise markup language commonly used on forum softwares. It allows members to format their messages, e.g.: add links, images, lists, etc.

Common examples of bbcode include:
  * [b]**bold text**[/b]
  * [i]//italic text//[/i]
  * [u]__underlined text__[/u]
  * [url]http://www.slashdot.org[/url]
  * [img]http://img300.imageshack.us/img300/751/concretedimension1024x7zp1.jpg[/img]