STAI
| Acronym | Definition |
|---|---|
| STAI | State-Trait Anxiety Inventory (psychological assessment) |
| STAI | Strobe a Interrupt |
| STAI | Spielberger Trait Anxiety Inventory |
| STAI | Sekolah Tinggi Agama Islam (Indonesian: Islamic Religious Affairs High School) |
| STAI | Supersonic Tunnel Association International (est. 1954) |
| STAI | Sugar Technologists' Association of India (est. 1925; New Delhi, India) |
| STAI | Sail Training Association Italia (Italy) |