Telecommunications
The term ‘telecommunications’ means ‘communicating at a distance’. This could include communicating by sending a letter by post but the use of the term is restricted to electrical or electronic communications. Information may be transmitted either by electric currents (in wires) or by electromagnetic radiation. Electromagnetic radiation is usually taken to mean radio waves but visible light and infra-red are also forms of electromagnetic radiation, so communication by optical fibre is included in telecommunication. The term includes the transmission and reception of sound, vision, text and information of other kinds.
Formerly all telecommunication was analogue in nature (except perhaps telegraphic transmissions in the Morse ...
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