Government of New York City are designated jointly by the five county executive committees of each party. In most cases, insurgents who are party members can challenge party-designated candidates by petitioning for a primary election. The Brooklyn Public Library and Queens Public Library are public library systems within their respective boroughs. The New York Public Library is a private, non-governmental library serving the Bronx, Manhattan, and Staten Island, that receives government funding. The New York City Housing Authority (NYCHA) provides public housing for low- and moderate-income residents. NYC Health + Hospitals (New York City Health and Hospitals Corporation, or HHC) operates public hospitals and clinics.
Manhattan of Greater New York", Manhattan and the Bronx, though still one county, were established as two separate boroughs. On January 1, 1914, the New York State Legislature created Bronx County, and New York County was reduced to its present boundaries. The construction of the New York City Subway, which opened in 1904, helped bind the new city together, as did additional bridges to Brooklyn. In the 1920s Manhattan experienced large arrivals of African-Americans as part of the Great Migration from the southern United States, and the Harlem Renaissance, part of a larger boom time in the Prohibition era that included