Approximately 100 years ago when the telephone was invented, communicating with people who were far away from us was very difficult. The telegraph had already been invented, but it hasn't been fast enough. It has caused some problems in urgent events. However, as I mentioned above telephone came and has solved these problems and also this was the beginning of the field of telecommunication, but also Tesla's inventions were very important for the development of telecommunication. This beginning was also important, because this field trained its own engineers (telecommunication engineers) and radio, television, radars
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