CNN

Cable News Network, almost always referred to by its initialism CNN, is a U.S. cable news channel founded in 1980 by Ted Turner. Upon its launch, CNN was the first channel to provide 24-hour television news coverage, and the first all-news television channel in the United States. While the news channel has numerous affiliates, CNN primarily broadcasts from its headquarters at the CNN Center in Atlanta, the Time Warner Center in New York City, and studios in Washington, D.C. and Los Angeles. CNN is owned by parent company Time Warner, and the U.S. news channel is a division of the Turner Broadcasting System.
CNN is sometimes referred to as CNN/U.S. to distinguish the North American channel from its international counterpart, CNN International. As of June 2008, CNN is available in over 93 million U.S. households. Broadcast coverage extends to over 890,000 American hotel rooms, and the U.S broadcast is also shown in Canada. Globally, CNN programming airs through CNN International, which can be seen by viewers in over 212 countries and territories. In terms of regular viewers (Nielsen ratings), CNN rates as the United States' number two cable news channel and has the most unique viewers (Nielsen Cume Ratings).
Source: wikipedia