Smoke Signals (1 jan 1800 ano antes da era comum – 31 dez 500 ano)
Descrição:
Smoke Signals were used as the main form of communication if over a long distance. In 150BC, the greeks created a system of alphabetic characters and converted it into numeric characters so they were able to communicate it over torch smoke singals.
Adicionado na linha do tempo:
Communication Systems
Communication systems timeline for 11/9 geography class.
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