SMF (Simple Machines Forum) is an open-source forum system created using PHP and MySQL. Developed by the Simple Machines Organization. The current version is 2.0.9. However, 2.1 Beta 1 released on November 21, 2014 was released as beta. A stable version 2.1 will be released soon. There are significant changes in version 2.1. The theme in this version is adapted to mobile devices.
English is the abbreviation of "modification". This word can also be translated as "add-on". These attachments are again written by volunteer developers. Most commonly used are "Simpleportal", "Aeva media", "SimpleSef", "Advanced Reputation System". Using these plugins can change the operation of the SMF system.