A
- ABEDA
- ACP-landene
- ADB
- AfDB
- afhængighedsteori
- African Development Bank
- AIIB (Asian Infrastructure Investment Bank)
- aktietegningsoption
- alliancefrihed
- allianceteori (militær teori)
- Allied Command Operations (NATO Allied Command Operations)
- Allied Command Transformation (NATO Allied Command Transformation)
- Amazonpagten
- Andespagten
- Antarktistraktaten
- Arab Bank for the Economic Development of Africa
- Arab Monetary Fund
- Asia-Europe Meeting (ASEM Asia-Europe Meeting)
- Asian Development Bank
- ATTAC
- AVS-landene