You know you are a powerful research company when your results change the face of television programming. The king of TV ratings, Nielsen Media Research collects its nationwide audience data from electronic People Meters placed in thousands of randomly selected households. In addition, the company measures viewers' habits in about 210 local markets, through meter technology in the largest and paper diaries in the rest. Separately, the company surveys TV watching in Hispanic markets. It generates a wide variety of reports for its customers, which include TV networks, advertisers, and TV stations. Nielsen Media Research is the largest unit in the media segment of its parent company, Nielsen.