| Abbreviation | Definition |
|---|---|
| AIOC | Academic Initiatives Oversight Committee |
| AIOC | Accademia Italiana Optometristi Contattologi |
| AIOC | Advanced Infantry Officers Course |
| AIOC | Advanced Infantry Officers' Course |
| AIOC | Anglo Iranian Oil Company |
| AIOC | Associazione Insigniti Onorificenze Cavalleresche |
| AIOC | Azerbaijan International Oil Consortium |
| AIOC | Azerbaijan International Operating Company |
| AIOD | Activities Interests Opinions and Demographics |
| AIOD | All In One Designer |
| AIOD | Automatic Identified Outward Dialing |
| AIOE | All India Organisation of Employers |
| AIOIC | American Indian Opportunities Industrial Center |
| AIOIC | American Indian Opportunities Industrialization Center |
| AIOP | Adolescent Intensive Outpatient Program |
| AIOP | All In One Profits |
| AIOP | Alternative to Intensive Outpatient Program |
| AIOP | Art in Odd Places |
| AIOS | Acute Illness Observation Scale |
| AIOS | All In On Settings |