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Computer, Charles Babbage
A computer is a machine that stores and automates information through computer programs specifically designed for this task. -
Telegraph, Joshep Henry
The telegraph is an electrical device capable of transmitting text messages. To do this, it uses coding, by means of Morse code, in electrically emitted signals. -
telephone, Alexander Graham Bell
Device that transmitted sounds through a cable through electrical signals. -
Radio, Guillermo Marconi
Radio is the signaling and communication technology using radio waves. Radio waves are electromagnetic waves with a frequency between 30 hertz and 300 gigahertz. -
Television, Jhon Logie Baird
Television is a system for transmitting images and sound at a distance through Hertzian waves. -
Tablet, Alan Kay
Tablets use a touch sensitive screen so you can type and navigate quickly. They are characterized by being very light and are cheaper than a computer. -
Mobile phone, Martin Cooper
A mobile phone or cell phone is a portable device that can make or receive calls through a radio frequency carrier, while the user is moving within a telephone service area.