Hypernyms:system
Inherited Hypernyms:communication systemsysteminstrumentalityartifactwholeobjectphysical entityentity
Direct Hyponyms:P.A.P.A. systemPAPA systemground controlintercomintercommunication systemlinkphone systempublic address systemradioradio linktelecom equipmenttelecom systemtelecommunication equipmenttelecommunication systemtelephone systemwireless
Full Hyponyms:
cableclosed-circuit televisioncolor televisionfield-sequential color televisionground controlintercommunication systeminterphonemedlinepublic address systemradioradio linkradiotelegraphsatellite televisionsurveillance systemtelecommunication systemtelephone systemtelevisionwalkie-talkie