AACO: Arab Air Carriers Organization
AAPA: Association of Asia Pacific Airlines
AASA: Airline Association of Southern Africa
ABTA: Association of British Travel Agents
ACAC: Arab Civil Aviation Commission
ACAS: Airborne Collision-Avoidance System
ACC: Airport Consultative Committee
ACI: Airports Council International
AEA: Association of European Airlines
AFCAC: African Civil Aviation Commission
AFRAA: African Airlines Association
AFTN: Aeronautical Fixed Telecommunications Network
AGM: Annual General Meeting
ALPA: Airline Pilots Association
ANS: Air Navigation Services
AOC: Air Operators Certificate
API: Advance Passenger Information
APIS: Advance Passenger Information Systems
APU: Auxiliary Power Unit
ARINC: Aeronautical Radio Inc
ASA: Air Services Agreement
ASEAN: Association of Southeast Asian Nations
ASO: Agency Services Office
ASPA: Association of South Pacific Airlines
ASTA: American Society of Travel Agents
ATA: Air Transport Association of America
ATAC: Air Transport Association of Canada
ATAG: Air Transport Action Group
ATC: Air Traffic Control
ATK: Available Tonne Kilometre
ATM: Air Traffic Management
ATN: Aeronautical Telecommunication Network
ATNS: Air Traffic and Navigation Services
ATS: Air Traffic Services
ATS/DS: Air Traffic Services Direct Speech
ATSP: Air Traffic Service Providers
AUC: Air Transport Users Council
AWB: Air Waybill
BAR: Board of Airline Representatives
BCBP: Bar Coded Boarding Passes