Arthur C. Nielsen was an American businessman born on September 5, 1897 in Chicago, Illinois. He started his career as an engineer before founding A.C. Nielsen Company in 1923. The company revolutionized the advertising industry by introducing statistical sampling techniques to measure radio ratings. Nielsen expanded his business to include television ratings as the medium gained popularity. He played a central role in shaping the media landscape through his innovative market research methodologies. Arthur C. Nielsen passed away on June 1, 1980, leaving behind a lasting legacy in the field of market research and advertising.