Nielsen Online, a service of the Nielsen Company, provides measurement and analysis of online audiences, advertising, video, consumer-generated media, word of mouth, commerce and consumer behavior. Previously a majority investor in both companies, Nielsen purchased NetRatings and BuzzMetrics in the spring of 2007, combining them to form Nielsen Online. Outside of the U.S., Nielsen Online operates in 16 countries across Europe, Latin America and Asia Pacific.

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Richard A. "Rick" Nielsen (born December 22, 1946) is the lead guitarist, backing vocalist, and primary songwriter of the rock band Cheap Trick. For the band's first few albums, Nielsen wrote the majority of the material himself. He is well known for having many custom-made guitars from Hamer Guitars, including his famous five-neck guitar.

Nielsen formed Cheap Trick in 1972 with bassist Tom Petersson, another Rockford, Illinois native. Before Cheap Trick, he was in a number of bands, including Grim Reapers and Fuse. The latter recorded a one-off debut album released on Epic Records which sold poorly. After the record failed to gain any attention, the band moved to Philadelphia and the band changed their name to Sick Man Of Europe.

The group toured Europe unsuccessfully in 1972 and returned to Illinois in 1973. Upon their return to Rockford, Nielsen and Petersson renamed the band Cheap Trick after adding drummer Bun E. Carlos and vocalist Randy "Xeno" Hogan. In 1974, Hogan left the band and lead singer Robin Zander joined after his contract with a Wisconsin resort was completed.