What are the ways of human transmission of information

Transmission of letters, is an important means of human interaction, the transmission of letters in ancient times, there are the following ways: flying pigeons, beacon communication, feather diabolical, feather book, chicken feather letter, pass bamboo tube, urgent foot delivery.

Modern transmission of information: telegraph, telephone, postal service, computer networks.

Flying pigeons: a method of contact between the ancients, the letter tied to the feet of the pigeons, and then passed to the person to be delivered.

Beacon Communication: Beacons served ancient military warfare as a primitive means of sound and light communication. From the border to the capital of the country as well as on the border defense line, a beacon tower was built every certain distance. When the enemy invaded, the beacon fire would be lit one after another, and when the lords saw the beacon fire, they would immediately send troops to help them resist the enemy.

Feather diabolical: is inserted with a feather letter. Yan Shigu note: "diabolic, with wooden slips for the book, feet two inches long, with the conscription also. There is an emergency, then add the bird feathers inserted; show speed and urgency." The meaning is that in ancient times, when the war is urgent, the feather inserted in the letter, called "feather diabolic".

Feather book: the ancient documents for the mobilization of the army.

Chicken Feather Letter: A kind of ancient feather letter, that is, sticking chicken feathers on the letter, so it is also called "chicken feather letter". This way of transmitting letters was still in use until the Anti-Japanese War. The Wa, Lahu, Jingpo and other ethnic minorities in southwestern China continued to use this method of letter transmission until the eve of the democratic reform.

Transmission of bamboo tube: the ancient way of transmission of letters with bamboo tubes, from the Tang Dynasty until the Ming and Qing Dynasties, along the custom, bamboo tubes play a role in the protection and transmission of letters, similar to today's envelope.

Emergency foot delivery: an ancient way of transmitting urgent military intelligence, commonly known as "pass the gold medal". Started in the Song Dynasty, the Yuan Dynasty called "urgent foot store". Legend has it that Yue Fei received twelve gold medals one day after another from Emperor Gaozong of the Song Dynasty to make him retreat, which is the Jinyu card emergency foot delivery.

The postal system relies on transportation: the speed of information transfer is relatively fast, the distance is relatively slow, and the cost is high.

Telegraph, telephone: fast, single text message.

Computer network: large amount of information, diversified information, transmission speed, not subject to geographical barriers