The university graduate schools and committees are divided into five divisions: Biological Sciences, Humanities, Physical Sciences, Social Sciences, and the Institute for Molecular Engineering.[146] In the autumn quarter of 2015, the university enrolled 3,588 graduate students: 438 in the Biological Sciences Division, 801 in the Humanities Division, 1,102 in the Physical Sciences Division, 1,165 in the Social Sciences Division, and 52 in the Institute for Molecular Engineering.[147] The university is home to several committees for interdisciplinary scholarship, including the John U. Nef Committee on Social Though