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Football,is the name given to a number of different, but related, team sports. The most popular of these world-wide is (association) football (also known as soccer). The English word "football" is also applied to American football, Australian rules football, Canadian football, Gaelic football, rugby football (rugby union and rugby league), and related games. Each of these codes (specific sets of rules) is to a greater or lesser extent referred to as "football" by its followers.