| 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) |