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Library of Congress Classification:Class A, subclass AC -- Collections - Series - Collected works - Subclass AC: Collections - Series - Collected works is a classification used by the Library of Congress classification system under Class A -- General Works. This article describes subclass AC.
Tsunami warning system - A tsunami warning system is a system to detect tsunamis and issue warnings to prevent loss of life. It consists of two equally important components: a network of sensors to detect tsunamis and a communications infrastructure to issue timely alarms to permit evacuation of coastal ...
Airborne Collision Avoidance System - Airborne Collision Avoidance System (ACAS) provides pilots with a system independent of air traffic control to detect the presence of other aircraft which may present a threat of collision. Where the risk of collision is imminent, the system provides an indication of a manoeuvre that will reduce the risk of ...
Flexible AC transmission system - Flexible Alternating Current Transmission System (FACTS) is a static equipment used for the AC transmission of electrical energy. It is meant to enhance controllability and increase power transfer capability.
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