By writing letters
in the olden days they used to set up fire.and by the fire .the smoke of the fire go's up in the sky and they the people see it then they know that someone is trying to communicate with them by zainab 6a in epic
All the ways in which people communicated in the olden days can still be used today. Some old techniques (such as sending smoke signals) are no longer very popular, for the obvious reason that modern technques (such as making a phone call) are much more efficient, but you could still use the earlier techniques if you wanted to. Sometimes people do like to keep old technology alive. For example, there are still people who learn how to chip stones in order to make stone-age tools such as arrow heads and hand axes.
birds as messengers,people or messengers on foot,messengers on horses,signs such as a burning flame.
transportation, machinery, and even energy
i dont know but i know that there are wind towers in uae
The two types of communication channel are analog and digital communication channel. An analog channel uses continuously varying (analog) electrical signals while a digital one uses discrete signals.
i dont know please tell me someone, i know that it has been used to make ink in the olden days but what else?
it is used for the communication
twitter is a business tool which is used for many different types of communication. some of the uses of twitter in business communication are
Heat Cooking Protection Light Fun
SCSI uses a parellel communication chain and SAS uses serial Point to Point communication
it uses wireless web communication technology
It is used for communication.
Macs are used around the world in al types of business. See links below for some examples.