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Telegraph - Samuel Morse
The telegraph is an apparatus or device that uses electrical signals to transmit coded text messages, such as Morse code, over wire lines or radio communications. The electric telegraph, or more commonly just 'telegraph', replaced traffic light optical signal transmission systems, such as those designed by Claude Chappe for the French Army and Friedrich Clemens Gerke for the Prussian Army, thus becoming the first form of electrical communication. -
Telephone - Antonio Meucci
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, although he did not formalize his patent due to financial difficulties, presenting only a brief description of his invention at the United States Patent Office in 1871.
A few years later, in 1876, Alexander Graham Bell was the first to formally patent it, -
Radio - James Clerk Maxwell
Radio is a means of communication that is based on the sending of audio signals through radio waves
In 1873 the Scottish physicist James Clerk Maxwell formulated the theory of electromagnetic waves, which are the basis of radio. In 1887, the German physicist Heinrich Hertz confirmed Maxwell's theories, discovering how to produce and detect electromagnetic waves, and in 1894 the Serbian Nikola Tesla made his first public demonstration of a radio transmission. . -
Televison - John Logie Baird
Television is a system for the transmission and reception of images and sounds at a distance that simulate movements, which uses a diffusion mechanism. The transmission can be carried out by means of radio waves, by cable television networks, satellite television or IPTV, which exist in open and paid modes. However, it was not until 1884, with the invention of the Nipkow Disc by Paul Nipkow, that a relevant advance was made to create a medium. -
Mobile telephone - 1917
A mobile phone or cell phone is a portable phone that can make or receive calls through a radio frequency carrier, while the user is moving within a telephone service area
In the early stages of radio engineering, a handheld mobile radio service was conceived. In 1917, Finnish inventor Eric Tigerstedt filed a patent for a "Foldable pocket phone with a very thin carbon microphone." -
Computer - Konrad Zuse
The computer is a programmable digital machine that executes a series of commands to process the input data, obtaining convenient information that is later sent to the output units.
Far from being an invention of one person in particular, the computer is the evolutionary result of ideas of many people related to areas such as electronics, mechanics, semiconductor materials, logic, algebra and programming -
Tablet - Alan Kay
A tablet, in many places also called by the Anglicism tablet, 1 2 is a portable electronic device larger than a smartphone or a PDA
However, the first true devices only appeared at the beginning of the 21st century. Microsoft released the Microsoft Tablet PC which licensed tablets to various manufacturers. In 2001, the Finnish company Nokia developed a prototype tablet,
