| Acronym | Definition |
|---|
| APTA | American Public Transportation Association (formerly the American Public Transit Association) |
| APTA | American Physical Therapy Association |
| APTA | Asia Pacific Trade Agreement (formerly Bangkok Agreement) |
| APTA | American Public Transit Association (now the American Public Transportation Association) |
| APTA | Agência Paulista de Tecnologia dos Agronegócios |
| APTA | Asia Pacific Tourism Association |
| APTA | American Polarity Therapy Association |
| APTA | Atlantic Provinces Trucking Association |
| APTA | Association for the Promotion of Tourism to Africa |
| APTA | Association for the Preservation of Tennessee Antiquities |
| APTA | American Platform Tennis Association |
| APTA | Association de Prévention des Traumatismes Auditifs |
| APTA | Alabama Physical Therapy Association |
| APTA | Ajax Pickering Transit Authority |
| APTA | Alberta Play Therapy Association |
| APTA | Associação para Prevenção e Tratamento da Aids e Saúde Preventiva |
| APTA | Automated Patrol Telescopes Australia |
| APTA | Association of Private Tourism Agencies |
| APTA | All Purpose Training Aid |
| APTA | (3-acrylamidopropyl)trimethylammonium |
| APTA | Advanced Paperless Technology Associates |
| APTA | Aptitude Area |