
Ceefax (near-homonymous with `See Facts`) was the world`s first teletext information service. It was started by the BBC in 1974, and ran regularly filling BBC Two`s overnight schedule as Pages from Ceefax. The interactive service ran until 23:32:19 BST on 23 October 2012, in line with the digital switchover being completed in Northern Ireland....
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http://en.wikipedia.org/wiki/Ceefax

A type of 'Teletext' (q.v.) which is used to transmit pages of text and simple graphics. CEEFAX derives its name from seeing + facsimile.
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http://www.encyclo.co.uk/visitor-contributions.php

The BBC's Teletext broadcasting service, which first started broadcasting in 1974. See also Oracle.
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http://www.screenonline.org.uk/education/glossary.html

One of the UK's two teletext systems (the other is Teletext), or `magazines of the air`, developed by the British Broadcasting Corporation (BBC) and first broadcast on television in 1973. It has been continually upgraded and is still in operation
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https://www.encyclo.co.uk/local/21221
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