jose luis herrera lozada

5000 A.C. prehistory

Prehistoric man communicated through grunts and other sounds

3000 A.C Egyptians

represented the ideas through symbols

430 D.C.

The Romans used torches (telegraphic optical system)

in 1500 AZTECS

the communication was by means of messages written and carried by men on foot

The Indians of North America made use of smoke signals

Telegraphic Optical Systems (use of flags, or traffic lights)

in April 3 of 1860 the Communication was by horses

The United States launches Western Union's Westar I & II satellites.

in 1976 started the first Super TV Station

in 1979 The INMARSAT consortium (INternational MARitime SATellite organization)

in 1981 CELULAR TELEPHONY is born

The first HDTV formats are born

in 1985 Mexico launches its first satellite called Morelos

in 1989 The second Mexican satellite Morelos II

in 1993 in the United States begins the cellular telephony with digital technology.

Some event happened

On June 7, 1995, the Federal Telecommunications Law was published in Mexico.

It was 25 years in the United States of the first commercial cell phone service

February 7, 2009 The United States turns off analogue television to make way for Digital Television.