| Abbreviation | Definition |
|---|---|
| AINA | Arctic Institute of North America |
| AIND | Allen Institute for Neural Dynamics |
| AIO | American Institute of Organbuilders |
| AIOA | Art Institute Of Atlanta |
| AIOA | Atlanta Institute Of Aesthetics |
| AIOC | Art Institute of California |
| AIOC | Associate of the Institute Of Carpenters |
| AIOD | Armenian Institute Of Directors |
| AIOE | American Institute of Organizational Effectiveness |
| AIOH | Army Institute of Heraldry |
| AIOP | Australian Institute of Office Professionals |
| AIP | American Institute of Parliamentarians |
| AIP | Art Institute of Phoenix |
| AIPA | Alaknanda Institute for Performing Arts |
| AIPA | Australian Institute of Polish Affairs |
| AIPC | Australian Institute of Professional Counsellors |
| AIPC | Australian Institute Professional Counsellors |
| AIPE | Asia Institute for Political Economy |
| AIPE | Australian Institute of Professional Education |
| AIPF | Associated Institutions Pension Fund |