The University of California, Berkeley (UC Berkeley, Berkeley, Cal, or California) is a public research university in Berkeley, California. Founded in 1868, Berkeley is the flagship institution of the ten research universities affiliated with the University of California system. It is often ranked among the best universities in the world and the top public university in the United States. For 2017–18, the Academic Ranking of World Universities (ARWU) ranked Berkeley 5th in the world and 1st among public universities. Berkeley is also ranked 18th internationally among research universities in theTimes Higher Education World University Rankings, 6th in the 2017 Times Higher Education World Reputation Rankings.