The City University of New York is the public university system of New York City. It is the largest urban university system in the United States, comprising 25 campuses: eleven senior colleges, seven community colleges, and seven professional institutions. In 1960, John R. Everett became the first chancellor of the Municipal College System of New York City, later known as the City University of New York (CUNY). CUNY, established by New York state legislation in 1961 and signed into law by Governor Nelson Rockefeller, was an amalgamation of existing institutions and a new graduate school.