| Abbreviation | Definition |
|---|---|
| ADCS | Association of Directors of Childrens Services |
| ADCS | Association of Directors of Children's Services |
| ADDA | American Design Drafting Association |
| ADDA | Association of Deputy District Attorneys |
| ADDA | Atlanta Decatur Dart Association |
| ADDA | Attention Deficit Disorders Association |
| ADDC | Association of Discipline Defense Counsel |
| ADDE | Association of Dental Dealers in Europe |
| ADDP | Association of Developmental Disabilities Providers |
| ADE | Association for Documentary Editing |
| ADEA | Association for the Development of Education in Africa |
| ADEB | Association des Editeurs Belges |
| ADECA | Arctic Disaster Early Career Association |
| ADEF | Association des Exportateurs de Films |
| ADEP | Association d Entraide des Polios |
| ADEPA | Asociacion de Entidades Periodisticas Argentinas (Spanish: Argentine Association of Journalistic Ent |
| ADES | Association of Diabetes Educators of Singapore |
| ADETA | Alberta Distance Education Training Association |
| ADEWA | Agriculture Displaced Employees Welfare Association |
| ADF | Association Dentaire Française |