| Abbreviation | Definition |
|---|---|
| AADI | Autism Awareness Dogs Ireland |
| ABAI | Amateur Basketball Association of Ireland |
| ABCI | Association of Baptist Churches in Ireland |
| ACRI | American Committee for Relief in Ireland |
| AFIL | All-For-Ireland League |
| AFPI | Acupuncture for Fertility Pregnancy Ireland |
| AHPI | Association for Health Promotion Ireland |
| AIHS | American Irish Historical Society |
| AMRI | Association of Missionaries and Religious of Ireland |
| ANIC | Association of Northern Ireland Colleges |
| APNI | Alliance Party of Northern Ireland |
| ARI | Advancing Recovery in Ireland |
| ARTI | Athletic Rehabilitation Therapy Ireland |
| ASOI | Association for the Study of Obesity in Ireland |
| ASOI | Association for the Study of Obesity Ireland |
| AVARI | Association for Voluntary Action Research in Ireland |
| BIAZA | British and Irish Association of Zoos and Aquaria |
| BIES | British Irish and Empire Studies |
| BIIC | British Irish Intergovernmental Council |
| BIR | British and Irish Region |