One notable instance of their use was during the Spanish Armada, when a beacon chain relayed a signal from Plymouth to London.
However semaphore suffered from the need for skilled operators and expensive towers at intervals of ten to thirty kilometres (six to nineteen miles).
Zworykin, John Logie Baird and Philo Farnsworth (some of the inventors of television).
Communication was first used as an English word in the late 14th century.
Telecommunication occurs when the exchange of information between communication participants includes the use of technology.
It is transmitted either electrically over physical media, such as cables, or via electromagnetic radiation.
Starting in 1894, Italian inventor Guglielmo Marconi began developing a wireless communication using the then newly discovered phenomenon of radio waves, showing by 1901 that they could be transmitted across the Atlantic Ocean.
The first transatlantic telegraph cable was successfully completed on 27 July 1866, allowing transatlantic telecommunication for the first time.It comes from Old French comunicacion (14c., Modern French communication), from Latin communicationem (nominative communicatio), noun of action from past participle stem of communicare "to share, divide out; communicate, impart, inform; join, unite, participate in," literally "to make common," from communis".Homing pigeons have occasionally been used throughout history by different cultures.After the war, commercial radio AM broadcasting began in the 1920s and became an important mass medium for entertainment and news.World War II again accelerated development of radio for the wartime purposes of aircraft and land communication, radio navigation and radar.