The University of Illinois at Urbana-Champaign (U of I) is the flagship campus for the University of Illinois system. Founded in 1862 and opened in 1868, U of I has been growing ever since. Today the university has 17 colleges with over 150 programs of study. The main campus is comprised of nearly 300 buildings on 1,468 acres, and student enrollment in any given year exceeds 40,000. Furthermore, the university operates a number of extension programs throughout Illinois and the world, serving a total of over 2 ½ million people.