How many main styles of taekwondo are there ?
Those listed below are grouped by system : Kukkiwon ( widely known as the World Taekwondo Federation or WTF system ) , International Taekwon - Do Federation ( ITF ) , and other systems ( which includes some persons receiving ranks from taekwondo organisations that predate the other two systems , e.g. , the original Korea Taekwondo Association ) .