| Acronym | Definition |
|---|
| ACIO | Association Canadienne des Infirmieres en Oncologie (French: Canadian Association of Nurses in Oncology) |
| ACIO | Australian Commerce and Industry Office |
| ACIO | Advanced Contact Intelligence Organization |
| ACIO | Associate Chief Information Officer (corporate title) |
| ACIO | Army Careers Information Office |
| ACIO | Advertising Career Information Office |
| ACIO | Alien Contact Intelligence Organisation |
| ACIO | Aviation Certification and Interoperability Office |
| ACIO | Air Combat Intelligence Office |
| ACIO | Activity Chief Information Officer |
| ACIO | Aeronautical Chart and Information Office |
| ACIO | Assistant Central Intelligence Officer |