William Hanna worked at an American media company.
Metro-Goldwyn-Mayer Studios Inc. ( abbreviated as MGM or M-G-M , also known as Metro-Goldwyn-Mayer Pictures , Metro-Goldwyn-Mayer or simply Metro , and for a former interval known as Metro-Goldwyn-Mayer/United Artists , or MGM/UA ) is an American media company , involved primarily in the production and distribution of feature films and television programs . Time Warner Inc. is an American multinational mass media and entertainment conglomerate headquartered in New York City . William Hanna . At that time , the studio was sold to Turner Broadcasting System , which in turn was merged with Time Warner in 1996 ; Hanna and Barbera stayed on as advisors .