The Pennsylvania State University (Penn State or PSU) is a public state-related land-grant research university with campuses and facilities throughout Pennsylvania, United States. Founded in 1855 as the Farmers' High School of Pennsylvania, Penn State was named the state's first land-grant university eight years later. Its primary campus, known as Penn State University Park, is located in State College and College Township in Centre County. Penn State enrolls more than 89,000 students, of which more than 74,000 are undergraduates and more than 14,000 are postgraduates. In addition to its land-grant designation, the university is a sea-grant, space-grant, and sun-grant university. It is classified among "R1: Doctoral Universities – Very high research activity" and is a member of the Association of American Universities (AAU).