Teletext systems expensive cost of NABTS decoders, costing in the thousands of dollars upon their release to the public. NABTS, however, was adopted for a short while by American TV networks NBC & CBS throughout the early-to-mid 80s, CBS using it for their short-lived ExtraVision teletext service, which premiered after the early Antiope & Ceefax trials by CBS & KNXT, and NBC, who had a NABTS-based service called NBC Teletext for a very short time in the mid-1980s. NBC discontinued their service in 1985 due to the cost of NABTS decoders not dropping to an affordable level for the consumer public. The
BBC World Service Television BBC World Service Television BBC World Service Television, often abbreviated to WSTV (World Service Television), was the name of two BBC international satellite television channels between 1991 and 1995. It was the BBC's first foray into worldwide television broadcasting. In Europe, it was the successor to BBC TV Europe, which it replaced on 11 March 1991. The service was also launched in Asia as a 24-hour news and information service with minor differences, a precursor to BBC World News, launched on 14 October 1991. Unlike the BBC World Service at the time, it was not funded by the British government