PDAI
| Acronym | Definition |
|---|---|
| PDAI | Pouchitis Disease Activity Index |
| PDAI | Primary Dealers Association of India (finance) |
| PDAI | Primary Development/Test Aircraft Inventory (US DoD) |
| PDAI | Pennsylvania District Attorneys Institute (est. 1983) |
| PDAI | Perianal Disease Activity Index |
| PDAI | Programa de Desarrollo Agropecuario Integrado (Bolivia) |