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Radio waves: Look, no wires!
Radio waves carry many non-verbal signals to and from men and machines
If you don't have access to a wire or cable connection, radio energy can carry your message. Plenty of non-verbal communications use radio, says Hugh Saxby. The oldest and best known is Morse code. However, computers and machines also use radio signals to communicate information. Imagine you are a machine at the North Pole鈥�
成人论坛 World Service Archive
This programme was restored as part of the World Service archive project
