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
Teletext Ltd. 400-499 (which replaced pages 300-399 as Channel 4's page space). However on 30 October 2008, Teletext on 4 on Channel 104 closed and replaced in December 2008 by 1-2-1 Dating. using Teletext on 4's old channel number. Teletext Ltd. Teletext Ltd was the provider of teletext and digital interactive services for ITV, Channel 4 and Five in the United Kingdom. Teletext Ltd currently runs Teletext Holidays and Teletext Cars only. "Teletext Ltd" started providing teletext services for ITV and Channel 4 on 1 January 1993, replacing the previous ORACLE service which had lost the franchise. The company is now owned