4:

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(Internet);

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internet: -> International Network ( )

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...!!!

1969 ARPANET

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,

Arpanet

1974

1990 internet, ,

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(E-mail)

(Chat)

(Teleconference)

(Newsgroups)

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Chat/

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forum .

File Transfer Protocol FTP

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(MP3 ,Wav, Midi)

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.

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