telecomunication invetion

By martasm
  • telegraph

    a system for transmitting messages from a distance along a wire, especially one creating signals by making and breaking an electrical connection
  • telephone

    a system for transmitting voices over a distance using wire or radio, by converting acoustic vibrations to electrical signals.
  • television

    a system for converting visual images (with sound) into electrical signals, transmitting them by radio or other means, and displaying them electronically on a screen.
  • radio

    the transmission and reception of electromagnetic waves of radio frequency, especially those carrying sound messages.
  • computer

    an electronic device for storing and processing data, typically in binary form, according to instructions given to it in a variable program.
  • tablet

    a small disc or cylinder of a compressed solid substance, typically a measured amount of a medicine or drug.
  • mobile phone

    mobile phone
    a telephone with access to a cellular radio system so it can be used over a wide area, without a physical connection to a network