-
simbolos abstractos jeroglificos 1000 AC
-
señales de humo 1184 AC
-
celular
-
el periodico
-
por medio del papel y tinta
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telegrafo
-
imprenta
-
la radio
-
el telefono
-
la television
-
satelite
-
las redes
-
la internet
-
la fibra optica
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