The Pennsylvania State University system is one of the largest state university systems in the US. Penn State has an enrollment of almost 96,000 students; 13,600 of them are graduate students. It offers 160 undergraduate and 150 graduate programs at about 20 campuses. The school's oldest and largest campus, with about half of the system's undergraduate students, is at University Park in central Pennsylvania. Other sites include the College of Medicine in Hershey, Pennsylvania, and the Dickinson School of Law in Carlisle, Pennsylvania. It generates about $8.5 billion in annual direct and indirect economic impacts within Pennsylvania.