Oklahoma State University is a land-grant, sun-grant, coeducational public research university located in Stillwater, Oklahoma, United States. OSU was founded in 1890 under the Morrill Act. Originally known as Oklahoma Agricultural and Mechanical College, it is the flagship institution of the Oklahoma State University System. Official enrollment for the fall 2010 semester system-wide was 35,073, with 23,459 students enrolled at OSU-Stillwater. Enrollment shows the Freshman class of 2012 was the largest on record with 4,298 students. OSU is classified by the Carnegie Foundation as a research university with high research activity.