ACOI
| Acronym | Definition |
|---|---|
| ACOI | American College of Osteopathic Internists |
| ACOI | Associazione Chirurghi Ospedalieri Italiani (Italian: National Congress of Italian Hospital Surgeons; Italy) |
| ACOI | Association of Compliance Officers in Ireland (est. 2002) |
| ACOI | Army Court of Inquiry (India) |
| ACOI | American College of Oral Implantologists |