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The electronic revolution sometimes referred to as the technological or industrial revolution has completely changed the entire world Everyone is reeking the benefits of technology From electricity to telephones to television to satellites to computers to cellular phones technology is everywhereThe most fundamental part of anything electric is electricity Two thousand years ago in the 16th century William Gilbert proved that many substances are electric and that they have two electrical effects In 1747 Benjamin Franklin in America and William Watson in England independently reached the same conclusion all materials possess a single kind of electrical fluid that can penetrate matter freely but that can be neither created nor destroyed The action of rubbing merely transfers the fluid from one body to another electrifying both Franklin and Watson originated the principle of conservation of charge the total quantity of electricity in an insulated system is constantOne of the most important communication discoveries is the telephone Alexander Graham Bell is generally acknowledged as the inventor of the telephone although a number of other inventors in his day contributed to various aspects of the device Bells most important contribution was his view of the telephone as a means of communication over real distances using human speech instead of such nonvocal codes as smoke signals tomtoms or Morse code Nally Bell and others discovered that the sounds of speech could be converted to an electrical signal transmitted over copper wires and converted back to sound at the receiving deviceTodays telephone system links the entire globe The telephone industry in the United States alone generates about 200 billion yearly in revenues and is the largest segment of the giant communications industry httpwwwcyberstreet People can communicate instantly with each other all around the worldThe automobile or car is the most widely used form of transportation The automobile is a self-propelled wheeled steerable vehicle used for transporting people and small cargoes on land Although the gasoline automobile first appeared in Germany
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