| Abbreviation | Definition |
|---|---|
| AIP | Adoption Information Packet |
| AIP | American Institute of Philanthropy |
| AIPB | American Institute for the Prevention of Blindness |
| AIPM | American Institute for Preventive Medicine |
| AIR | American Institute for Research |
| AIRC | American Indian Relief Council |
| AIRCA | Association of International Research and Development Centers for Agriculture |
| AIS | Alzheimer's Information Site |
| AIS | American Indian Services |
| AIS | Association for Information Systems |
| AISES | American Indian Science and Engineering Society |
| AISG | Australian Infertility Support Group |
| AISI | Africas Information Society Initiative |
| AISJ | American Institute for Social Justice |
| AITAF | Arts In The Armed Forces |
| AITR | Autism Intervention and Treatment Research |
| AITS | Australian Information Technology Society |
| AIUSA | Amnesty International United States of America |
| AIYRS | American Indian Youth Running Strong |
| AJCC | American Joint Committee on Cancer |