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The National Football League (NFL) is a professional American football league consisting of 32 teams, divided equally between the National Football Conference (NFC) and the American Football Conference (AFC).
The NFL operated in a two-conference system from 1933 to 1966, where the champions of each conference would meet in the NFL Championship Game. If two teams tied for the conference lead, they would meet in a one-game playoff to determine the conference champion. In 1967, the NFL expanded from 15 teams to 16 teams.