APTU
| Acronym | Definition |
|---|---|
| APTU | Antwerpse Provinciale Taxi Unie (Dutch: Antwerp Provincial Taxi Union; Antwerp, Belgium) |
| APTU | Association of Public Transport Users (Harpenden, Hertfordshire, England, UK) |
| APTU | Army Participating Test Unit |
| APTU | African Postal and Telecommunications Union |
| APTU | Army Prototype Test Unit |
| APTU | Auxiliary Power and Thrust Unit |