| APAO | Aggregate Producers' Association of Ontario (Canada) | 合计制片人协会(加拿大安大略省) |
| APAO | Association of Physician Assistants in Oncology | 肿瘤学医师助理协会 |
| APAO | Ate Producers Association Of Ontario | 安大略省食品生产者协会 |
| APAO | Association of Performance Art Organizers | 行为艺术组织者协会 |
| APAO | Aggregate Producers Association Of Ontario | 安大略省总生产者协会 |
| APAO | Asphalt Pavement Association of Oregon (Salem, OR) | 俄勒冈州沥青路面协会（俄勒冈州塞勒姆） |
| APAO | Alternative Policy Advisory Organizations | 替代政策咨询组织 |
| APAO | Asia Pacific Academy of Ophthalmology | 亚太眼科学会 |
| APAO | Archaeology and Physical Anthropology in Oceania | 大洋洲的考古学和物理人类学 |
| APAO | amorphous polyalphaolefin | 无定形聚α烯烃 |
| APAO | Amorphous Poly-Alpha-Olefins | 非晶态聚α-烯烃 |
| APAO | Asian Pacific Astronomy Olympiad | 亚洲太平洋天文学奥林匹克 |
| APAO | Atactic Poly Alpha Olefins | 无规聚α-烯烃 |
| APAO | Ames Public Affairs Office (NASA) | 艾姆斯公共事务办公室（NASA） |
| APAO | Amino Phenyl Arsine Oxide | 氨基苯基氧化胂 |