 The Graduate School is one of twelve constituent schools of Yale University and the only one that awards the degrees of Doctor of Philosophy, Master of Philosophy, Master of Arts, Master of Science, and Master of Engineering.While doctoral programs are also available in five of Yale's professional schools, students are enrolled through the graduate school, which confers their degrees.The school is administered in four divisions—Humanities, Social Sciences, and Biological and Physical Sciences—and its faculty are divided into 52 departments and programs.