AFCAC: African Civil Aviation Commission
AFTN: Aeronautical Fixed Telecommunications Network
ALPA: Airline Pilots Association
ANS: Air Navigation Services
AOC: Air Operators Certificate
APU: Auxiliary Power Unit
ARINC: Aeronautical Radio Inc
ATA: Air Transport Association of America
ATAG: Air Transport Action Group
ATC: Air Traffic Control
ATM: Air Traffic Management
ATN: Aeronautical Telecommunication Network
ATS: Air Traffic Services
BG: Board of Governors
CAA: Civil Aviation Authority
CANSO: Civil Air Navigation Services Organisation
CASE: Computer Aided Software Engineering
CAT: clear air turbulence
CBP: Customs and Border Protection
CBT: Computer-Based Training
CFIT: Controlled Flight Into Terrain
CVR: Cockpit Voice Recorder
DFDR: Digital Flight Data Recorder
EBAA: European Business Aviation Association
ECAC: European Civil Aviation Conference
EDI: Electronic Data Interchange
EUROCONTROL: European Organisation for the Safety of Air Navigation
FAA: Federal Aviation Administration
FDR: Flight Data Recorder
FMS: Flight Management System
GPWS: Ground Proximity Warning System
IACA: International Air Carrier Association
IATA: International Air Transport Association
ICAO: International Civil Aviation Organization
ILS: Instrument Landing System
ITU: International Telecommunication Union
JAA: Joint Aviation Authorities
JAR: Joint Aviation Requirements
LACAC: Latin American Civil Aviation Commission
MLS: Microwave Landing System