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Airports Council International (ACI)—industry group representing over 1,600 major airports.

ACI 2006 annual report  (PDF)—includes airport traffic information and forecasts.

International Air Transport Association (IATA)—representing the world's major airlines.

History of aircraft landing aids

Contoh Soalan Peperiksaan Pegawai Trafik Kawalan Udara Gred A41 / A29