PTAI
| Acronym | Definition |
|---|---|
| PTAI | Perguruan Tinggi Agama Islam (Indonesian: Islamic Higher Education) |
| PTAI | Phillip Townsend Associates, Inc. (Houston, TX) |
| PTAI | Primary Training Aircraft Inventory |
| PTAI | Part-Time Assistant Instructor |
| PTAI | Percentual Total Activity Index (cardiovascular medicine) |