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Telegraph, Joseph Henry
The telegraph is an electrical device that can transmit text messages. -
Telephone, Alexander Graham Bell
The telephone works sending signd to telecommunication towers. We use them to communicate among us without the need of being close. -
Radio, Guillermo Marconi
The radio sends signs through the electromagnetic waves. -
Television, John Logie Baird
The television is a system of transmission and reception of images, sounds. -
Computer, Kornard Zuse
The computer is an electronical system that can store and process data. -
Tablet, Alan Kay
The tablets use a touch screen for write and surf faster. -
Mobile phone, Martin Cooper
The mobile phone can call, send text messages, surf in internet...