In 1996, the company tri-vested, creating three entities: D&B Companies, Nielsen, and the Cognizant Corporation. Cognizant Corporation included Nielsen TV Ratings, Gartner Group, Clarke-O'Neill, Erisco, and several other lesser known entities. In 1999, Cognizant Corporation spun off Nielsen TV Ratings and shortly thereafter divested all its holdings, emerging as IMS Health. IMS Health continued to hold its prize incubator company that is today known as Cognizant Corporation. Moody's, a credit reporting agency, was acquired by Dun & Bradstreet in 1962. In 1986, Dun & Bradstreet acquired the education data company Market Data Retrieval (MDR).