The GfK Group, established in 1934 as Gesellschaft für Konsumforschung (Society for Consumer Research) is Germany's largest market research institute, and the fourth largest market research organisation in the world, after Nielsen Company, Kantar Group and Ipsos.
TAM Media Research (abbreviated TAM)is a joint venture company between AC Nielsen and Kantar Media Research/IMRB.
Universal Music Group | Warner Music Group | Coxeter group | Volkswagen Group | Group of 77 | RTL Group | girl group | BT Group | ABB Group | Group One | Virgin Group | Thales Group | ING Group | group | Rio Tinto Group | Bloomsbury Group | Penguin Group | Carlsberg Group | Borders Group | Arup Group Limited | Benetton Group | Stagecoach Group | LMFAO (group) | Anschutz Entertainment Group | Tata Group | Rootes Group | Westfield Group | Group races | Group C | MTN Group |