California State University (CSU) is a public university system in California. It is one of the three major university systems that constitute California's public higher education system. The other two are California University System (UC System, 10 Campus) and California Community College System (123 Campus). Unlike California Research University (UC), California State University (CSU) is a teaching university. Neither university has the concept of "main campus", and each branch has its own independent teaching, enrollment, finance and management system.