| Acronym | Definition |
|---|
| APAO | Asia Pacific Academy of Ophthalmology |
| APAO | Assistant Public Affairs Officer (various locations) |
| APAO | Asphalt Pavement Association of Oregon (Salem, OR) |
| APAO | amorphous polyalphaolefin |
| APAO | Aggregate Producers' Association of Ontario (Canada) |
| APAO | Association of Physician Assistants in Oncology |
| APAO | Amorphous Poly-Alpha-Olefins |
| APAO | Asian Pacific Astronomy Olympiad |
| APAO | Acute Peripheral Arterial Occlusion (artery blockage) |
| APAO | Archaeology and Physical Anthropology in Oceania |
| APAO | Atactic Poly Alpha Olefins |
| APAO | Alternative Policy Advisory Organizations |
| APAO | Ames Public Affairs Office (NASA) |
| APAO | Association of Performance Art Organizers |
| APAO | Amino Phenyl Arsine Oxide |