BBCode

BBCode is an abbreviation for Bulletin Board Code, the markup language used to format posts in many modern message boards. The available tags are usually indicated by rectangular brackets surrounding a keyword, and they are parsed by the message board system before being translated into a markup language the browser understands, usually HTML or XHTML.

BBCode was devised and put to use in order to provide a safer, more limited way of allowing users to format their messages. Previously, many message boards allowed the users to include HTML, which could be used to break/imitate parts of the layout, or run javascript. Some implementations of BBCode have suffered problems related to the way they translate the BBCode into HTML, which could negate the security that was intended to be given by BBCode.