oral tradition - a way that stories and information about a culture are passed down through families by speaking about them , telecommunications - communication over a distance, especially by phone, radio and television, a telegraph - an old-fashioned way of sending messages using radio or electric signals, digital revolution - he change from analogue electronic and mechanical technology to digital electronics, hieroglyphs - pictures or symbols used as language, for example, in ancient Egypt, a printing press - a machine that makes copies of books, magazines, newspapers, etc., satellite communications - a method of communication using equipment that moves around the Earth to receive and send television, radio and telephone signals,

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