mathematics, statistics, biological sciences, physics, and chemistry. It is also prominent in law and medicine. Northwestern is accredited by the Higher Learning Commission and the respective national professional organizations for chemistry, psychology, business, education, journalism, music, engineering, law, and medicine. Northwestern conferred 2,190 bachelor's degrees, 3,272 master's degrees, 565 doctoral degrees, and 444 professional degrees in 2012–2013. Since 1951, Northwestern has awarded 520 honorary degrees. Northwestern also has chapters of academic honor societies such as Phi Beta Kappa (Alpha of Illinois), Eta Kappa Nu, Tau Beta Pi, Eta Sigma Phi (Beta chapter), Lambda Pi Eta, and Alpha Sigma Lambda (Alpha chapter).
Northwestern maintains a student-to-faculty ratio of 6:1. 77% of the classes have less than 20 students while 5.5% of the classes have more than 50 students.
=== Libraries and museums ===
The Northwestern library system consists of four libraries on the Evanston campus including the …
