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Telegraph
An electrical telegraph was a point-to-point text messaging system, used from the 1840s until better systems became widespread. It used coded pulses of electric current, there are 3 types of telegraph: Cooke and Wheatstone's five-needle telegraph from 1837 Morse Telegraph 1830s Hughes telegraph, an early (1855) teleprinter built by Siemens and Halske -
Telephone
The telephone is a telecommunication device designed to transmit acoustic signals at a distance by means of electrical signals. It was invented by Antonio Meucci, who in 1854 built his first prototype, -
Radio
Radio broadcasting is transmission of audio (sound), sometimes with related metadata, by radio waves intended to reach a wide audience. In terrestrial radio broadcasting the radio waves are broadcast by a land-based radio station, while in satellite radio the radio waves are broadcast by a satellite in Earth orbit.
The creator of the radio was Guglielmo Marconi in the 1890s. -
Television
Is a telecommunication medium used for transmitting moving images in monochrome (black and white), or in color, and in two or three dimensions and sound.
Inventor was John Logie Baird. -
Computer
A computer is a machine that can be instructed to carry out sequences of arithmetic or logical operations automatically via computer programming. In 1941, Konrad Zuse was the first to build a working computer.
Even though Charls Babbage is considered the father of computation for building the first "calculator" in 1822. -
Tablet
It is a portable electronic device that is larger than a smartphone or PDA, it is a single piece that integrates a touch screen (single or multi-touch) that emits light4 and with which it interacts primarily with the fingers or a stylet (passive or active). Alan Kay was the developer of the tablet. It was created in the late 60s -
Mobile phone
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. The radio frequency link establishes a connection to the switching systems of a mobile phone operator, which provides access to the public switched telephone network (PSTN). The inventores of the mobile phone are: Martin Cooper, W. Rae Young, Eric Tigerstedt and Donald Cox.
