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The first electrical telecommunications system,It worked by transmitting electrical signals over a wire laid between stations.
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Is an instrument designed for the simultaneous transmission and reception of the human voice.
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A piece of electronic equipment used for listening to radio broadcasts.Was created by Nikola Tesla but Guglielmo Marconi stole the patent.
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a device shaped like a box with a screen that receives electrical signals and changes them into moving images and sound.
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A computer is a programmable device that stores, retrieves, and processes data. The first successful commercial computers wereApple II, TRS-80 and PET 2001
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A tablet, or tablet PC, is a portable computer that uses a touchscreen as its primary input device,highly demanded in today's world for drawing and calculating.
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A mobile phone is a wireless handheld device that allows users to make and receive calls.Now phones are allowed to make almost every think that you need.
