They are called "suburbs," "edge cities," "outer cities," "exurbs," or just "the 'burbs." But the U.S. Census Bureau calls them "Component Cities." These are communities that are part of a larger MSA, but are not the main cities in that MSA. Component cities are incorporated areas of greater than 100,000 within the MSA of another city. In general, they depend on the nearby major city for public transportation, jobs, radio and television stations, daily newspapers, cultural activities, political leadership, and regional identity.