| Abbreviation | Definition |
|---|---|
| ARC/GEORGIA | Association for Retarded Citizens/Georgia |
| ARCA | AIDS Research Consortium of Atlanta |
| ARCF | Alger Regional Community Foundation |
| ARCF | American Red Cross Federation |
| ARCF | American Respiratory Care Foundation |
| ARCF | Arkansas Community Foundation |
| ARCf | Association Régionale de la Communauté francophone de Saint-Jean NB |
| ARCHS | Area Resources for Community and Human Services |
| ARCOT | AIDS Resource Center of Texoma |
| ARCS | Achievement Rewards for College Scientists |
| ARCSA | Australian Red Cross South Australia |
| ARCUSA | Association for Retarded Children in the United States of America |
| ARD | Associates in Rural Development |
| ARDF | Anglican Relief and Development Fund |
| ARE | Association for Research and Enlightenment |
| AREUEA | The American Real Estate and Urban Economics Association |
| ARF | AIDS Research Foundation |
| ARF | Alzheimer's Research Foundation |
| ARF | American Research Foundation |
| ARF | Animal Rescue Foundation |