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Telecommunication is the transmission of signals over a distance for the purpose
of communication. In modern times, this process almost always involves the sending
of electromagnetic waves by electronic transmitters but in earlier years it may
have involved the use of smoke signals, drums or semaphore. Today, telecommunication
is widespread and devices that assist the process such as the television, radio and
telephone are common in many parts of the world. There is also a vast array of
networks that connect these devices, including computer networks, public telephone
networks, radio networks and television networks. Computer communication across the
Internet, such as e-mail and instant messaging, is just one of many examples of
telecommunication.
From Wikipedia, the free encyclopedia
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