The system, begun in June 1987, now monitors 22 prisoners.

An electronic system monitors white blinds which can be drawn or opened all together at the same time.

Bob Anderson, a spokesman for the service, said efforts were under way to expand the list of agents that the systems can monitor.

Those systems constantly monitor your position and calculate the most efficient course.

This system does not actually monitor the driver's eyes.

He leaned back against the edge of a computer systems monitor station and said, "All right.

The system could only monitor external behavior: what a surrogate did and said.

The system would now monitor all incoming and outgoing communication.

This system currently monitors over 3000 video channels around the world.

In this protocol, each system monitors the wire, listening for traffic.