interactive communications system comprising a central unit capable of communicating information via cable TV, radio broadcast or telephone line to remote units, each connected to a monitor used to display information selected by a user keypad

'broadcast':16 'cabl':13 'capabl':8 'central':6 'communic':2,10 'compris':4 'connect':24 'display':30 'inform':11,31 'interact':1 'keypad':36 'line':19 'monitor':27 'radio':15 'remot':21 'select':32 'system':3 'telephon':18 'tv':14 'unit':7,22 'use':28 'user':35 'via':12

designing custom interactive communication systems made to the order and/or specification of others

'and/or':10 'communic':4 'custom':2 'design':1 'interact':3 'made':6 'order':9 'other':13 'specif':11 'system':5

maintenance and installation of custom interactive communication systems made to the order and/or specification of others

'and/or':13 'communic':7 'custom':5 'instal':3 'interact':6 'made':9 'mainten':1 'order':12 'other':16 'specif':14 'system':8

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