The evolution and development of information and communications technology in the past,
now we can communicate with people all over the world are very convenient. But to get here today. Communication has evolved over many generations. It is believed that the communication range of men in the early days. It will hit the armor, knocking the wooden ring on the other. And sending smoke signals Later, when the man knows how to write a book. I have no idea how to communicate with each other. The new message to the pigeons. Or sending the message to the messenger when the electricity. It is caused by the communications revolution, humans can communicate with each other. Without having to travel to each other. Do not hit the armor, knock on wood Do not send smoke signals Do not use the clipper Do not use Dove
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