Sony Pictures Television
On September 16, 2002, Sony Pictures Entertainment retired the name "Columbia TriStar" from television and renamed the American studio as Sony Pictures Television and its international division as Sony Pictures Television International. Some shows continued using the CTDT name, although many stopped using it in November 2002, while "Hollywood Squares" continued using it until early 2003.
Mainstream media
In the United States, movie production is known to have been dominated by major studios since the early 20th century; before that, there was a period in which Edison's Trust monopolized the industry. In the early twenty-first century the music and television industries was subject to media consolidation, with Sony Music Entertainment's parent company merging their music division with Bertelsmann AG's BMG to form Sony BMG and Tribune's The WB and CBS Corp.'s UPN merging to form The CW. In the case of Sony BMG there existed a "Big Five", later "Big Four", of major record companies, while The CW's creation was an attempt to consolidate ratings and stand up to the "Big Four" of American network (terrestrial) television (although the CW was actually partially owned by one of the Big Four in CBS). In television, the vast majority of broadcast and basic cable networks, over a hundred in all, are controlled by eight corporations: News Corporation (the Fox family of channels), The Walt Disney Company (which includes the ABC, ESPN and Disney brands), National Amusements (which includes CBS Corporation and Viacom), Comcast (which includes the NBC brands), Time Warner, Discovery Communications, E. W. Scripps Company, Cablevision, or some combination thereof.