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Computer, Charles Babbage
A computer is a device that accepts information (in the form of digitalized data) and manipulates it for some result based on a program, software, or sequence of instructions on how the data is to be processed. The digital computer stores data in discrete units and performs arithmetical and logical operations at very high speed. -
Telegraph, Joseph Henry
A telegraph is a communication system that sends information by making and breaking an electrical connection. It is most associated with sending electrical current pulses along a wire with Morse code encoding and you doing over wire. -
Telephone, Alexander Graham Bell
Telephones are inexpensive and simple to operate, and they offer an immediate, personal type of communication. Billions of telephones are in use around the world.
a system for transmitting voices over a distance using wire or radio, by converting acoustic vibrations to electrical signals. -
Radio, Guillermo Marconi
Radio is a way to send electromagnetic signals over a long distance, to deliver information from one place to another. The radio signal is an electronic current moving back and forth very quickly. A transmitter radiates this field outward via an antenna; a receiver then picks up the field and translates it to the sounds heard through the radio. -
Television, John Logie Baird
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. You use it to watch movies or series. -
Tablet, Alan Kay
A tablet is a wireless, portable personal computer with a touchscreen interface. It is typically smaller than a notebook computer, but larger than a smartphone.
It first appeared in English in the early 1300s to describe a flat stone used to write on, though alternative uses came later. -
Mobile phone, Martin Cooper
The mobile phone is primarily a communication device that uses voice, SMS, or MMS. It is a portable device for connecting to a telecommunications network in order to transmit and receive voice, video, or other data.