Arizona State University (ASU) is a public research university with its main campus in Tempe, Arizona. It is one of the largest public universities in the United States by enrollment. ASU offers degree programs in more than 800 areas of study, including over 250 undergraduate majors and more than 120 graduate programs. ASU is classified among "R1: Doctoral Universities ? Very high research activity". ASU's athletic teams are called the Sun Devils and compete in the Pac-12 Conference. ASU has multiple campuses throughout the Phoenix metropolitan area, with four regional campuses and several extension centers.