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In 1876, after discovering that to transmit human voice could only use a direct current, the nationalized Scottish inventor in U.S. Alexander Graham Bell, built and patented a few hours before hiscompatriot Elisha Gray's first phone capable of transmitting and receiving human voice in all its quality and timbre. Nor should sideline Thomas Alva Edison, who introduced major improvements in thesystem,

It was created in 1971 by Ray Tomlinson. Its name comes from the analogy with the post: both are used to send and receive messages, and used "mailboxes" in which messages are storedtemporarily on their way to their destination.
In 1863 the American inventor William A. Bullock press patented the first web-fed newspaper, newspapers can print on rolls rather than sheets



1971
EMAIL1863
THE NEWSPAPER

1876
THE PHONE

1873
THE RADIO

1983
THE CELL

1837
TELEGRAPH

1884
TV

In 1873 the British physicist James Clerk Maxwell announces the theory ofelectromagnetic waves, so that in 1888 Heinrich Hertz says that waves are extended at a rate similar to electromagnetic light speed. In 1897 Alexander Lee invented Fores calvula modulating radio waves are receivedand create waves get so high power transmission.

In 1983, Martin Cooper invented the first cell phone. As at the beginning were so big and expensive, were only used by the military and somebusinesses. For 1983 were smaller and cheaper and could be used by the general public.
The first electrical telegraph transmission equipment were invented by American Samuel FB Morse in 1837. The basic codecalled Morse code message by transmitting electrical impulses.
The history of the development of television has been in essence the story of the search for a suitable device to scan images. Thefirst was called Nipkow disk, patented by German inventor Paul Gottlieb Nipkow in 1884.







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