alternation current circuit {= AC circuit}

earth circuit [= earth return circuit]

enlarged circuit and compensation circuit

single filip-flop circuit (sff circuit)

trip circuit and closing circuit

address broadcast

addressable broadcast

Advertisement Broadcast

aeronautical broadcast service

aeronautical broadcast station

A-grade standard with Broadcast level

alive-broadcast

AM broadcast

Amplitude Modulation Broadcast

amplitude modulation(AM)broadcast

atomic broadcast

Audio Production and Broadcast Network

audio-record broadcast

authenticated broadcast schemes