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Telegraph-David Alter
a system for transmitting messages from a distance along a wire, especially one creating signals by making and breaking an electrical connection. -
Telephone-Antonio Melucci
The telephone it's a device that allowed multiple messages to be transmitted over a wire at the same time. -
Radio-Guillermo Marconi
Radio is the technology of signaling and communicating using radio waves. -
Television-Philo Taylor Farnsworth
An electronic system of transmitting transient images of fixed or moving objects together with sound over a wire or through space by apparatus that converts light and sound into electrical waves and reconverts them into visible light rays and audible sound. -
Computer-John Vincent Atanasoff
The computer is a programmable electronic device designed to accept data, perform prescribed mathematical and logical operations at high speed, and display the results of these operations. -
Mobile phone-Martin Cooper
A mobile phone is a portable telephone that can make and receive calls over a radio frequency link while the user is moving within a telephone service area. -
Tablet-Jeff Hawkins
A tablet is a touch screen device that resembles a very large smartphone. Tablets can access the internet and act in many ways like a laptop.
