International broadcasting organisations have existed since regular radio broadcasts began in the 1920s.

Famous variants include 'Eurovision', aka the European Broadcasting Union, and the Communist-bloc response 'Intervision' for eastern Europe.

A non- governmental version of this is seen here with 'Intertel'. This was a grouping of four television networks with a public-service ethos. Founded by Rediffusion, it contained Australia's ABC, Canada's CBC, and the US National Educational Television (later to become, effectively, PBS).

These companies each produced one documentary feature per month, which were passed around the group, ensuring that there would be an Intertel presentation every week. Rediffusion networked these productions for ITV until Intertel disappeared when Rediffusion lost its independence in 1968.

Hear the Intertel ident here