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computer, Charles Babbage
A computer is an electronic system used to store and process data. The computer takes data from the outside (through the input units), stores it in its memory, processes it and sends it to the operator (through the output units). -
telegraph, Joseph Henry
The telegraph is an electrical device capable of transmitting text messages. To do this, it uses coding, by means of Morse code, in electrically emitted signals. -
telephone, Alexander Graham Bell
Un teléfono es un aparato que permite transmitir sonidos a distancia mediante señales eléctricas. -
radio, Guglielmo Marconi
Radio (understood as radio or broadcasting, terms not strictly synonymous) is a means of communication that is based on the sending of audio signals through radio waves, although the term is also used for other forms of sending remote audio such as internet radio. -
television, 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. -
tablet, Alan Kay
Image result for what is a tablet for
Tablets or tablets use a touch-sensitive screen so you can quickly type and navigate. They are characterized by being very light and are cheaper than a computer. In addition, they are more practical, since all their handling is done with the fingers. -
mobile phone, Martin Cooper
The mobile cell phone is an electronic device that allows communication through various tools: by telephone, through applications, emails, among others. The function of the cell phone is to communicate and that is the root of its importance, especially in emergency situations.