Animated map of Canada and the United States showing principal communications networks.

An animated map of Canada and the United States. Radio communications Tower over hilltop. Workmen installing underground communications cables. Telephone communications in everyday life. Men and women working in an office. United Press International teletypewriters on a desk. Man looks at a screen and speaks over the phone. A cable-laying ship in operation at sea. An animated map showing the undersea cable connections to various places.