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 London BBC London BBC London is the BBC English Region producing local radio, television, teletext and online services in London and parts of the surrounding area. Its output includes the daily "BBC London News" and weekly "Sunday Politics" on television, the BBC Radio London radio station and local coverage of the London area on BBC Online and BBC Red Button. The region's headquarters are situated in the new eastern extension of Broadcasting House. The staple of the local television service is BBC London News which broadcasts daily on BBC One, appearing with short bulletins during "BBC Breakfast", after the "BBC News