The University of California, Davis (also referred to as UCD, UC Davis, or Davis) is a public teaching and research university established in 1905 and located in Davis, California, USA. The campus was originally established as the University Farm, the agricultural extension of UC Berkeley and the second campus of the University of California system. Covering 7,145 acres (2,891ha), the campus is the largest within the University of California system and third largest by enrollment. The Carnegie Foundation classifies UC Davis as a comprehensive doctoral research university with a medical program, veterinary program, and very high research activity. UC Davis faculty includes 21 members of the National Academy of Sciences, 21 members of the American Academy of Arts and Sciences, 13 members of the American Law Institute, 11 members of the Institute of Medicine, and 11 members of the National Academy of Engineering.