The National Collegiate Athletic Association has three distinct divisions of competition: Division I, Division II, and Division III. Division I schools have the largest athletic budgets and sponsor the most sports.
Within Division I, there are two subdivisions for schools with football programs. Some schools do not have football programs-these are simply referred to as being in Division I. Other schools have football programs and compete in the NCAA's Football Championship Subdivision (FCS). These schools compete in Division I-AA, and are a part of the NCAA's official post-season tournament.
Finally, there is Division I-A. Schools in D-IA have the largest athletic budgets, give out the most athletic scholarships, and must meet minimum requirements for football attendance. Division I-A is known as the Football Bowl Subdivision, or FBS. Unlike the FCS, the FBS uses bowl games for postseason matchups, including the College Football Playoff.
D-IA schools are expected to be the most competitive, most recognizable, and most successful in big competitions. Only teams in Division I-A compete in bowl games, although teams from the FBS and FCS are allowed to play each other during the regular season.