| Acronym | Sense | Language | Topics |
|---|---|---|---|
| PTT | Poŝto, Telegrafo kaj Telefono | In Esperanto | → Telecommunications → Transport and postal services |
| PTT | Purpura Thrombotique Thrombocytopénique | In French | → Blood and circulatory system → Pathology |
| PTT | Post Telegraaf Telefoon | In Dutch | → Telecommunications → Transport and postal services |