Smoke signals for example.
In order to communicate.
They used structures of stone or adobe bricks. Also created beautiful pottery jewelry and elaborate baskets they also used fire to communicate over long distances
the egyptians used a fether and ink to communicate
Back in the early American fire service, bugles were used to communicate on the fire ground. The bugle was worn around an officer's neck so that they could direct fire fighting operations, and so these officers were easily spotted. Now the bugles identify rank or position of authority. The more bugles you see, the higher the rank.
they were used for people back in time to communicate like in Egypt would use them to communicate or write on walls.
They didnt.
to communicate with your friends
The Gamewell system was an early type of fire alarm system developed in the 19th century. It used telegraph technology to quickly notify fire stations of emergencies. The system helped improve response times to fires by providing an efficient way to communicate alarms.
Fire Blankets are used to suffercate the fire and get all of the energy out of it.
Whistles are used by dolphins to communicate, though the nature and extent of their ability to communicate in this way is not known.Dolphins use - Ultrasound to communicate.
Users can communicate to their computer using the keyboard. Another device that can be used to communicate to a computer is the mouse.
to communicate with deaf people or for people with voice impairment to communicate