ACAO
| Acronym | Definition |
|---|---|
| ACAO | Access-Control-Allow-Origin (computing) |
| ACAO | Assistant Chief Administrative Officer (various locations) |
| ACAO | Aero Club Adele Orsi (Italian air gliding club; Varese, Italy) |
| ACAO | Apprentissage Collaboratif Assisté par Ordinateur (French: Computer Assisted Collaborative Learning) |
| ACAO | Assistant Cultural Affairs Officer (US State Department, Public Affairs) |
| ACAO | Armenian Cultural Association of Ottawa (Ottawa, ON, Canada) |
| ACAO | Acyl Coenzyme A Oxidase |
| ACAO | Anterior-Cerebral Artery Occlusion |