United States Abbreviations and Acronyms
- APCNapa County Airport, Napa, California, United States
- APDDestroyer Escort
- APDAAmerican Parliamentary Debate Association
- APESApplied and Practical Engineering Society
- APFNaples Municipal Airport, Naples, Florida, United States
- APHISU.S. Department of Agriculture's Animal and Plant Health Inspection Service
- APIAmerican Petroleum Institute (oil)
- AQAmerican Samoa
- AQCRAir Quality Control Region (US) (environment)
- AQHQuinhagak Airport, Quinhagak, Alaska, United States
- AQOAluminum Company of America
- AQTNuiqsut Airport, Nuiqsut, Alaska, United States
- AQWHarriman and West Airport, North Adams, Massachusetts, United States
- AQYGirdwood Airport, Girdwood, Alaska, United States
- ARArkansas
- AR/AAVArmored Reconnaissance/Airborne Assault Vehicle (US)
- ARAAcadiana Regional Airport, New Iberia, Louisiana, United States
- ARBAnn Arbor Municipal Airport, Ann Arbor, Michigan, United States
- ARCArctic Village Airport, Arctic Village, Alaska, United States
- ARGWalnut Ridge Regional Airport, Walnut Ridge, Arkansas, United States
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