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Established in 1923, AC Nielsen is one of the leading marketing information providers in the world. It serves manufacturers and retailers of fast-moving consumer packaged goods. The company provides its services in more than 100 countries worldwide. ACNielsen offers retail and consumer market research services and analytical tools. Headquartered in New York City, it maintains a location in Syosset, N.Y. The company is a part of The Nielsen Company, which is one of the leading information and media companies in the world. It is a privately held company that serves clients in the automotive, telecommunications and finance sectors. The Nielsen Company provides online intelligence, mobile measurement, and market and media information services. It also publishes various business publications, such as Billboard, The Hollywood Reporter and Adweek.