The University of Illinois at Urbana-Champaign (U of I, UIUC, or simply Illinois) is a public research university in the state of Illinois, United States. It is the oldest and largest campus in the University of Illinois system. The university comprises 18 colleges that offer more than 150 programs of study. Additionally, the university operates an extension that serves 2.7 million registrants per year around the state of Illinois and beyond. The campus holds over 286 buildings on 1,468 acres (6 km²) in the twin cities of Champaign and Urbana, and has an annual budget of nearly $1.5 billion. As of 30 June 2007, the University of Illinois Foundation a systemwide endowment totals at $2.197 billion. The undergraduate program was ranked 40th among national universities and 10th among public universities by U.S. News & World Report in 2009. According to Academic Ranking of World Universities, the University of Illinois at Urbana-Champaign ranked 26th out of the 503 international institutions recognized. It is home to some of the highest-ranked Engineering and Accounting programs in the United States.