EntityQ5071845· pop 9· linked from 101 articlesmaster keySign in to savekey designed to operate multiple locksConnectionsdoorEntitydigital object identifierEntitylockEntitypasswordEntitybibcodeEntityclosed-circuit televisionEntityhingeEntityauthenticationEntitypadlockEntitykeychainEntitydoor handleEntitylatchEntitytreeEntityaccess controlEntityalarm deviceEntitysecurity alarmEntityMotion sensorEntitypressure switchEntityemergency exitEntityReed switchEntityCategoriesLocksmithing