| Abbreviation | Definition |
|---|---|
| AOL | All Overseas Labor |
| AOPEC | Arab Organization for Petroleum Exporting Countries |
| AOR | Agency of Record |
| APBO | Asia Pacific Business Outlook |
| APEC | Asia Pacific Economic Cooperation |
| APEC | Asia-Pacific Economic Cooperation |
| APHIS | Animal and Plant Health Inspection Service |
| APIC | Asian Paint Industry Council |
| ApS | Anpartsselskab (Danish term for a limited liability company) |
| APTTA | Afghanistan-Pakistan Transit Trade Agreement |
| AQIS | Australian Quarantine and Inspection Service |
| AQL | Acceptable Quality Level |
| AQSIQ | Administration of Quality Supervision Inspection and Quarantine |
| ASAN | Association of Southeast Asian Nations |
| ASCCI | AustraliaSingapore Chamber of Commerce and Industry |
| ASCCI | Australia–Singapore Chamber of Commerce and Industry |
| ASEM | Asia-Europe Meeting |
| ASIA | Alternative Solution For International Accounting |
| ASLC | Australia Sri Lanka Council |
| ASN | Advance Shipping Notice |