"Amateur wrestling is the most widespread form of sport wrestling. There are two international wrestling styles performed in the Olympic Games under the supervision of FILA (Fédération Internationale des Luttes Associées or International Federation of Associated Wrestling Styles): Freestyle and Greco-Roman. Freestyle is possibly derived from the English Lancashire style. A similar style, commonly called Collegiate, Folkstyle, or Scholastic, is practiced in secondary schools, colleges, and younger age groups in the United States. Where the style is not specified, this article refers to the international styles." Source:Wikipedia