Analysis of information sources in references of the Wikipedia article "Teletext" in English language version.
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As a gross simplification, there are two basic forms of videotex, those systems which use broadcasting, and which are given the generic name of teletext (examples of which are Ceefax and Oracle in the UK and Seven text in Australia) and those systems which use telephone signals, which are called viewdata systems
As a gross simplification, there are two basic forms of videotex, those systems which use broadcasting, and which are given the generic name of teletext (examples of which are Ceefax and Oracle in the UK and Seven text in Australia) and those systems which use telephone signals, which are called viewdata systems