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550 BCE
Postal service
System of messengers who rode horses carrying mail day and night. -
Telegraph
The telegraph is a device for transmitting and receiving messages over long distances -
Pneumatic Post
The pneumatic post was another wya for letters to be delivered more quickly between people. Underground pressured air tubes carry capsules from one area to another -
Telephone
Using telephone lines let’s people communicate long distances -
Radio
Using radio signals allows people to communicate long distances