Even casual television viewers are familiar with the Neilsen ratings.
Not as well known is Arhur C. Nielsen. Jr., the man who helped to establish the A.C. Nielsen Company, the firm founded by his father, as a global leader in market research.
Nielsen, Jr., the company's driving force since the 1950s, died October 3, 2011, in Winnetka, Illinois. He was 92.
Full obituaries, detailing Nielsen's work and its influence, are available at: