| Abbreviation | Definition |
|---|---|
| ATIC | Africa Twin Internetional Connection |
| ATKV | Afrikaanse Taal-en KultuurVereniging |
| ATN | Africa Trade Network |
| ATNP | African Theological Network Press |
| ATPS | African Technology Policy Secretariat |
| ATPS | African Technology Policy Studies |
| ATR | Africa Travel Resource |
| ATSA | Association for Translation Studies in Africa |
| ATU | African Telecommunications Union |
| ATUC | African Trade Union Congress |
| ATV | Afrikaanse TaalVereniging |
| AU | African Union |
| AUA | African Unit of Accounts |
| AUAAA | Adventist University of Africa Alumni Association |
| AUB | African Union of Broadcasting |
| AUBA | Africa University Bible Academy |
| AUBA | African United Baptist Association |
| AUBP | African Union Border Programme |
| AUCC | African University College of Communications |
| AUPSC | African Union Peace and Security Council |