Columbia Broadcasting Company, one of the three largest commercial radio and television companies in the United States, focuses on news and entertainment programming. Headquartered in New York City, the company's main organizations are: Broadcasting, Television Network, Self-Employed Television and News. The main series: CSI series, NCIS, Criminal Minds, Ghost Whisperer, Digital Pursuit, Withou a Trace (Search for the Secret Unit), Community Women, The Pretender, The Unit and so on.