-
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). -
Image result for what is a telegraph for
The telegraph is an apparatus or device that uses electrical signals for the transmission of coded text messages, such as Morse code, through wire lines or radio communications. -
A telephone is a device that allows remote transmission of sounds, generally voice, being transformed into electrical impulses by means of a microphone, after the electrical impulses reach their destination, a loudspeaker is responsible for transforming the impulses back into sounds. -
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 is a system for the transmission and reception of images and sounds at a distance that simulate movements, which uses a diffusion mechanism. -
Tablets work in a similar way to a computer, although they are usually focused to be used more for content reading and web browsing than for professional uses. -
They have essential functions such as the possibility of calling or sending text messages, and in some devices the use of multimedia files or surfing the Internet using GSM or WiFi connections. Most of these devices have a physical keyboard and a small non-capacitive screen.