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Telegraph (Samuel morse)
A system for transmitting messages from a distance along a wire, especially one creating signals by making and breaking an electrical connection. -
Telephone (Alexander Graham Bell)
A telephone is a device that makes it possible to transmit sounds at a distance by means of electrical signals. -
Radio (Guglielmo Marconi)
The prime purpose of radio is to convey information from one place to another through the intervening media (i.e., air, space, nonconducting materials) without wires. Besides being used for transmitting sound and television signals, radio is used for the transmission of data in coded form. -
Television (John Logie Baird)
Television, sometimes shortened to TV or telly, is a telecommunication -
computer (Konrad Zuse)
It has the ability to store, retrieve, and process data. -
Mobile phone(Ibm company)
Mobile phones are used for a variety of purposes, such as keeping in touch with family members, for conducting business. -
Tablet(nokia)
The tablets are similar at computera