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This review covers those aspects of communications which are relatively new and will probably have a continuing impact for at least two years — although this forecast, like nearly all other forecasts, is likely to be mostly wrong. A small amount of essential basic material is included — such as the section entitled ‘The bandwidth/speed imperative’, So much effort is being devoted to this subject, particularly in the case of POTS ( Plain Old Telephone System) improvements, that a few words about it seems to be in order.

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