The University of Illinois is already one of the best universities in the United States and ranks among the top five public universities in China. Can provide 150 more than 4,000 courses in many fields; 15000 degrees are awarded every year. Its library started with only 644 books, and now it has more than170,000 books, making it the third largest university library in the United States, next only to Harvard and Yale. Illinois University of Extended Information (UI or UOI) was founded in 1867. It is a university system in Illinois, USA, and one of the most influential public university systems in the United States, enjoying a high reputation all over the world. The University of Illinois includes three campuses: Urbana-Champaign, Chicago and Springfield. Urbana (UIUC) is the flagship of the University of Illinois, the top comprehensive research university in the United States, a founding member of the "Top Ten Conferences" in the United States and a member of the association of american universities (AAU). Known as the "public ivy", it is also known as the "three giants of American public universities" with the University of California at Berkeley and the University of Michigan. Its engineering school is the highest in the United States and even in the world. University of Chicago (UIC) is the largest research university in Chicago, a first-class national university in the United States, leading in urban affairs, medicine and health sciences, and has the largest medical school in the United States. Springfield (UIS, also translated as Springfield) is a liberal arts university, ranking among the best in the public regional universities in the Midwest of the United States.