| Abbreviation | Definition |
|---|---|
| BRUI | Business Retail Union of Ireland |
| CARI | Children At Risk in Ireland |
| CBSI | Catholic Boy Scouts of Ireland |
| CCNI | Charity Commission for Northern Ireland |
| CENI | Constructing Excellence in Northern Ireland |
| CFMI | Centre For Mindfulness Ireland |
| CGI | Confederation of Golf in Ireland |
| CHOMI | Centre for the History of Medicine in Ireland |
| CIAW | Catskills Irish Arts Week |
| CIDA | Celtic Irish Dance Academy |
| CIGA | Council of Irish Guiding Associations |
| CIL | Commissioners of Irish Lights |
| CIRA | Continuity Irish Republican Army |
| CPNI | Communist Party of Northern Ireland |
| CTYI | Centre for the Talented Youth of Ireland |
| CUI | Christian Unions Ireland |
| CVID | Champlain Valley Irish Dance |
| DBIV | Don Bosco Ireland Volunteers |
| DCSI | Debt Collection Services Ireland |
| DENI | Department of Education Northern Ireland |