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The ancient china , native americans use it , in ancient china people use Smoke Signals because something is wrong or they are in danger.

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The carrier pigeon was used in the WW1 and WW2 to send messages

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During World War II, the United Kingdom used about 250,000 Carrier pigeons for many purposes. Is possible where a message is written on thin light paper and rolled into a small tube attached to the bird's leg.

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The horses transport the messages from station to station.
Every hundred or so miles the rider would be replaced.

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The Semaphore Flags used to send optical signals. It is also
known as optical telegraph.
include signal towers with special installations on them or hand-held flags.

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The telegraph was created in 1838 by Samuel Morse , it was the mos popular form to communicate at 1800's and 1900's.

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The telegraph was created in 1838 by Samuel Morse , it was the mos popular form to communicate at 1800's and 1900's.

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The telephone has 6 creators
Antonio Meucci  in 1849, and Frenchman Charles Bourseul  in 1854, Alexander
Graham Bell won the first U.S. patent for the device in 1876.
A telephone is a telecommunications device that permits two or more users to conduct a conversation when they are too
far apart to be easily heard directly.

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The Radio has 3 authors *Nikola Tesla* , *William Dubilier*, *Reginald Fessenden* .
The radio use de satelitlle conection to listeing to news ,music , entertain programs.

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Ray Tomlinson is the author of the Email.
The advantajes of the Email are:

Email is a free tool.

Email is quick.

Email is simple.

Email allows for easy referencing.

Email is accessible from anywhere – as long as you have an internet connection.

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The SmartPhone is the most popular mean of communication in the 21st century .
Steve Jobs may be the father of the modern smartphone but the father of the first device that can lay claim to the title of smartphone was Frank Canova.