In the early 1990s, a new phenomenon of radio, tv, 1950 in Western societies; which can be used as an educational medium. Radio and tv play an important role and made the front row of social technology, since now. Some scholars hold that the interval between the past decade 1950 to 1960, this is a major change in the educational technology community since the establishment of radio and television still has to remove the mass communication theory and systems theory into use in educational technology. Therefore, in the early 1950 's that use the words "Visual and audio communications" or "audio-visual communications" instead of "Visual and sound teaching" or "instruction", which surely is machines, audio-visual, point clear, that communication technology is an important tool to convey the lessons themselves.
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