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Telecommunications history
Category:Early telecommunications
Articles in category "Early telecommunications"
There are 12 articles in this category.
Aldis lamp
B
Beacon
D
Drum (communication)
H
Heliograph
I
International maritime signal flags
J
Jungle drums
O
Optical telegraph
P
Polybius square
Pony Express
R
Relay league
S
Semaphore (communication)
Smoke signals
Categories
:
Telecommunications history
01-04-2007 01:18:14
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