New York metropolitan area eight subregions are often further divided. For instance, Long Island can be divided into its South and North Shores (usually when speaking about Nassau County and western Suffolk County) and the East End. The Hudson Valley and Connecticut are sometimes grouped together and referred to as the Northern Suburbs, largely because of the shared usage of the Metro-North Railroad system. The geographical, cultural, and economic center of the metropolitan area is New York City, which consists of five boroughs, each of which is also a county of New York State. The five boroughs – Brooklyn, Queens, Manhattan, the Bronx, and
History of New York City dominated the South, Boston dominated New England; Chicago, the nation's railroad hub, dominated the Midwest United States; however, New York City dominated the entire nation in terms of communications, trade, finance, popular culture, and high culture. More than a fourth of the 300 largest corporations in 1920 were headquartered in New York City. In 1898, the modern City of New York was formed with the consolidation of Brooklyn (until then an independent city), Manhattan, and outlying areas. Manhattan and the Bronx were established as two separate boroughs and joined together with three other boroughs created from parts of adjacent counties