| AA | Association Agreement |
| AACP | Alleged anti-competitive practice |
| ABAC | APEC Business Advisory Council |
| ACDS | APEC Communications and Database System |
| ACP | African, Caribbean and Pacific (states) |
| ACV | Agreement on Customs Valuation |
| AD | Anti-dumping |
| ADA | (Australian) Anti-Dumping Authority |
| ADB | Asian Development Bank |
| ADP | Anti-dumping practices |
| ADR | Alternative dispute resolution |
| AEC | African Economic Community |
| AEM | ASEAN Economic Ministers |
| AFL-CIO | American Federation of Labor-Congress of Industrial Organizations |
| AFTA | ASEAN Free Trade Agreement |
| AGP | Agreement on Government Procurement |
| AIA | ASEAN Investment Area |
| AICO | ASEAN Industrial Cooperation (scheme) |
| AIDA | Australian-Indonesia Development Area |
| AIJV | ASEAN Industrial Joint Venture (scheme) |
| ALADI | Asociación Latinamericana de Integración (Latin American Integration Association) |
| AMS | Aggregate measure of support |
| AMU | Arab Maghreb Union |
| ANSC | APEC National Study Center, Korea |
| ANZCERTA | Australia New Zealand Closer Economic Relations Trade Agreement |
| ANZSIC | Australia and New Zealand Standard Industrial Classification |
| AP | Administrative protection |
| APEC | Asia Pacific Economic Cooperation |
| APECEF | APEC Education Foundation |
| APT | Asia Pacific Telecommunity |
| ARMS | Actions Reporting and Monitoring Syetem (APEC) |
| ASC | APEC Study Center |
| ASEAN | Association of South East Asian Nations |
| ASEM | Asia-Europe Meeting |
| ASP | American Selling Price |
| ATC | Agreement on Textiles and Clothing (WTO) |
| ATC | Agricultural Technical Cooperation (APEC) |
| ATCA | Agreement on Trade in Civil Aircraft |
| ATPC | Association of Tin Producing Countries |
| AUSPECC | Australian Pacific Economic Cooperation Committee |
| AV | Audiovisual (services) |
| AVE | Ad valoren equivalent |