University of Oxford is a cornerstone of British higher education. The venerable university has about 20,000 students (including more than 12,000 undergraduates), 39 colleges, the celebrated Rhodes Scholarship, and the Oxford University Press. The university describes its colleges as autonomous units operating in a manner similar to the way individual states function in the US. Oxford's self-governing colleges select their own students and provide housing, meals, libraries, and recreation. The university offers a diverse range of study covering fields such as engineering, history, and theology. Many Oxford students earn BA degrees after three years of study.