Oklahoma State University (also referred to informally as Oklahoma State, OKState, and OSU), 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 (Oklahoma A&M), it is the flagship institution of the Oklahoma State University System. OSU is classified by the Carnegie Foundation as a research university with high research activity.