- AAIO stands for Ann Arbor Is Overrated (blog)
- AIO stands for Association for Asian Indians in Ophthalmology
- AAIO stands for Allergy, Asthma, & Immunology Online (American College of Allergy, Asthma & Immunology)
- AAIO stands for Acute Adhesive Intestinal Obstruction
Abbreviations And Their Meaning