In addition to these seven acknowledged national championships there are also ten additional years in which the NCAA's official record book lists other selections (mostly by math rating systems) of the Sooners as national champions, with the first four years in retrospect: 1915, 1949, 1953, 1957, 1967, 1973, 1978, 1980, 1986, 2003. In general, math formula rankings are not recognized as national championships. The University of Oklahoma does not acknowledge these additional "championships", as they were not awarded by the Associated Press, United Press International (UPI), USA Today Coaches Poll, or the Bowl Championship Series (BCS).