| Abbreviation | Definition |
|---|---|
| APTIS | Advanced Pilot Training Interactive Systems |
| APTIS | All Purpose Ticket Issuing System |
| APTIS | Automatic Panoramic Thermal Integrated Sensor |
| APTJ | Apt J Apt J |
| APTK | Advance Penetration Tool Kit |
| APTK | Ayerst pregnancy test kit |
| APTL | Aerosol and Particle |
| APTL | Association of Part Time Librarians |
| APTL | Automotive Production Technologies Ltd |
| APTL | Average Passenger Trip Length |
| APTM | A Place To Meet |
| APTM | Acute partial transverse myelitis |
| APTM | Advanced Public Transport Modes |
| APTM | Aerial Project Technical Media |
| APTM | All Prostitutes Take Money |
| APTM | Anugerah Perdana Teknologi Maklumat |
| APTM | Application Program to Transaction Manager |
| APTM | Associação Portuguesa de Terapia da Mão |
| APTM | Associated Physical Therapists of Milwaukee |
| APTN | Asia Pacific Telecentre Network |