Security monitoring and alarm systems and structural components therefor, not for vehicles, consisting of control panel units installed at protected premises, sensors installed at protected premises for sensing motion, smoke, glass breakage, gas and the like, and central station receivers and computers installed at a monitoring station; interactive and remote home appliance control and monitoring systems and structural components therefor, consisting of a control and monitoring unit installed in the home, an appliance control module installed in the home for communicating between the appliance and the control and monitoring unit, and a remote control and monitoring unit installed at a remote location for optional control and monitoring of the appliance from outside the home; interactive and remote computer control and monitoring systems and components therefor; global positioning satellite transmitting and receiving devices for locating or tracking people, animals or things, namely global positioning transceivers interfaced to a control and monitoring unit