Smoke Signals (11 ч 11 мин, 29 авг 1800 г. до нашей эры – 22 ч 44 мин, 30 июн 500 г.)
Описание:
For a long time, Smoke Signals were used as the main form of communication. This is because it could be used over a long distance. In 150BC, the Greeks created a system of alphabetic characters and converted it into numeric characters. This way they could convert it using pairs of torches into smoke signals.
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Communication Systems
Geo Homework
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