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1 janv. 150 av. J.-C. - Smoke signals used

Description:

Greek historian Polybius develops a complex system of alphabetical signals sent by holding sets of torches in pairs

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Timeline of Communications

ByAndrew
13 nov. 2019
1
0
411

Date:

1 janv. 150 av. J.-C.
Maintenaint
~ Il y a 2176 ans
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