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| The radio is a medium and is one of the earliest forms of communication in the 20th century. It continues to be upgraded and now people are able to spread their news and ideas throughout the world with XM radio. |
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| The computer is a medium. It transfer tons of information throughout the entire world and is a quick source for information. The expanding use of the computer has changed from dial-up connection to video conferences. |
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| The telephone is one of the other early mediums of the 20th century. People communicate everyday over the phone and now feel the need to have a phone with them at all times, in their pockets. Communication between people has become very easy with the instant chatting the telephone provides. |
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