Founded from an 1868 bequest from Edwin Augustus Stevens, enrollment at Stevens includes more than 5,500 undergraduate and graduate students representing 47 states and 60 countries throughout Asia, Europe and Latin America. It is classified among "R2: Doctoral Universities – High research activity". The university is home to two national Centers of Excellence as designated by the U.S. Department of Defense and U.S. Department of Homeland Security. Two members of the Stevens community, as alumni or faculty, have been awarded the Nobel Prize: Frederick Reines (class of 1939), in Physics, and Irving Langmuir (Chemistry faculty 1906–1909), in chemistry.