| Acronym | Sense | Language | Topics |
|---|---|---|---|
| PAI | Polskiej Agencji Informacyjnej (www.pap.pl) | In Polish | → Newspapers, journalism → Poland |
| PAI | Public Authority for Industry | In English | → Standardization → Public administration, government |
| PAI | Piłkarska Agencja Informacyjna | In Polish | → Newspapers, journalism |
| PAI | Plasminogen Activator Inhibitor | In English | → Enzymes → Blood and circulatory system |
| PAI | Produit d'Activation des Impuretés (de la céramique) | In French | → Chemistry → Nuclear technology |