| Acronym | Definition |
|---|
| PAAI➣Penn Avenue Arts Initiative (Pittsburgh, PA) |
| PAAI➣Pennsylvania Association of Arson Investigators |
| PAAI➣Process Analytical Applications, Inc. (Friendswood, TX) |
| PAAI➣Pan American Airlines, Inc. |
| PAAI➣Pulmonary Artery Area Index (cardiovascular medicine) |
| PAAI➣Parent Attitude Assessment Instrument |