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Communication 5
Communication 5

The physical era conveys information through the combination of body, eyes, gestures, and natural media such as mountains and trees.

Bi Sheng invented movable type printing (2 photos)

The upright walk in the oral era has led to an increase in the demand for information transmission by human beings, which has spawned language.

The era of writing and writing With the development of productivity, human beings have a demand for information records, and texts are born.

In the printing era in 1044, Bi Sheng invented the movable type printing. In 1450, the Germanic Gutenberg invented the metal type printing.

In 1837, American Morse invented the telegraph machine.

In 1857, the transatlantic submarine telegraph cable was completed.

In 1875, Bell made the first call in the history of invention.

In 1895, the Russian Popov and the Italian Marconi successfully developed a radio receiver.

In 1895, the French brother Lumière premiered the first film in Paris.

In 1912, in the Titanic shipwreck, the radio saved more than 700 lives.

In the 1920s, the radio came out.

In the 1920s, the British Baird successfully carried out the transmission of television pictures and was praised as the TV inventor.

When the Second World War broke out, the television industry was interrupted, and the warfare highlighted the characteristics of low transmission cost and easy reception, and the audience increased again.

In the era of Internet communication, in 1955, the United States issued the first military electronic computer for the needs of the war.

In 1962, the United States launched the first communications satellite, opening the era of television satellite transmission.

In 1969, the US military established the ARPANET to prevent communication disruption in the event of an attack.

In 1983, the US Department of Defense divided the APA network into a military network and a civilian network, and gradually expanded into today's Internet.

In 1993, the United States announced plans to build a high-speed information channel to integrate computers, telephones, and television media.

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