Answer: adt

AnswerCrossword Clue
ADTSummertime in Halifax :abbr.
ADTSecurity system giant
ADTBig name in security systems
ADTHome security letters
ADTHome alarm co.
ADTTelegraph group: Abbr.
ADTBig inits. in security
ADTBig inits. in home security
ADTBig name in home security systems
ADTBig letters in home security