| Abbreviation | Definition |
|---|---|
| AHIP | America's Health Insurance Plans (lobbying group) |
| AHOY | Adventure Help And Opportunities For Youth |
| AHP | Association for Healthcare Philanthropy |
| AHPA | American Health Planning Association |
| AHPCS | American Historical Print Collectors Society |
| AHRC | Association for the Help of Retarded Children |
| AHRC | Atlanta Harm Reduction Coalition |
| AHRF | American Hearing Research Foundation |
| AHRS | Applied Human Rights Seminar |
| AHSA | Anderson Home School Association |
| AHSE | Association for Horsemanship Safety and Education |
| AI | Advocacy Institute |
| AI | Advocates International |
| AI | Amnesty International |
| AI | Assist International |
| AIA | American Institute of Architects |
| AIA | Archaeological Institute of America |
| AIAA | Americans for International Aid and Adoption |
| AIAQC | American Indoor Air Quality Council |
| AICB | Angels in Cowboy Boots |