The University of California, Santa Barbara (UC Santa Barbara or UCSB) is a public land-grant research university in Santa Barbara County, California, United States. Tracing its roots back to 1891 as an independent teachers college, UC Santa Barbara joined the University of California system in 1944. It is the third-oldest campus in the system, after Berkeley, and UCLA. UCSB's campus sits on the oceanfront site of a converted WWII-era Marine Corps air station. UCSB is organized into three undergraduate colleges (Letters and Science, Engineering, and Creative Studies) and two graduate schools (Education and Environment), offering more than 200 degrees and programs. It is classified among "R1: Doctoral Universities – Very high research activity" and is regarded as a Public Ivy.