PhpBB (PHP Bulletin Board) is a popular, most powerful and commonly used Internet forum systems. It is free open source and available under the GNU (General Public License). PhpBB is easy to install and administer and this application allows more flexibility in terms of design and organization. It is built on php and MySQL. It has a large database of modifications that can be installed, can be edited and languages sets that also can be added. PhpBB can create unlimited number of forums and categories, word sensors, mass emailing, set permissions, polls, smilies and much more things. By this application it is easy-to-work-with administration panel. It is the most widely used IMB (Internet Message Board). It allows the customization of even the most intricate features without having to edit code directly while advanced users will value the ease with which phpBB can be integrated into existing systems. Now a days millions of people use phpBB on a daily basis, making it the most widely used open source bulletin board system in the world.