PAAI
| 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 |