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It is an elecrtical machine capable of storing and treating it automatically by means mathematic operations and logical controlled by informatic programs. -
It was a system created for transmiting messages from a distance, by a wire. It creates signals by making and breaking creating an elecrtical connection. It is by Morse code. -
It was created for transmiting voices over a distance using wire, by converting accoustic vibrations to electrical signals. -
It is based on the transmission and reception of radiomagnetic waves. Especially those carrying sound messages. -
It is a system for transmiting images and sounds from a distance by means of hertzian waves. -
It is a wireless and portable computer with a touchscreen interface. It is smaller than a notebook but larger than a smartphone -
It's a portable device that can make calls or recive calls through a radio frequency carrier.