| APTL | Accredited POSIX Testing Laboratory 
| Others |
| APTL | Administrative Payment Team Leader
| Others |
| APTL | Advanced Package Testing Laboratories
| Others |
| APTL | Advanced Packaging Technology Laboratories
| Others |
| APTL | Advanced Packaging Technology Labs
| Others |
| APTL | Advanced Phase Transformation Laboratory
| Others |
| APTL | Advanced Proactive Teleconsulting Lab
| Others |
| APTL | Aerosol and Particle
| Others |
| APTL | Aerosol and Particle Technology Laboratory
| Others |
| APTL | Aerosol Particle Technology Laboratory
| Others |
| APTL | Agriculture Programs and Trade Liaison
| Others |
| APTL | Agriculture Programs Trade Liaison
| Others |
| APTL | Alnico Pro Tele Lead
| Others |
| APTL | Alternating Projection Temporal Logic
| Others |
| APTL | Andhra Pradesh Tanneries Ltd
| Others |
| APTL | Applied Plasma Technology Laboratory
| Others |
| APTL | Artech Power Trading Ltd
| Others |
| APTL | Assembly of Professionals and Technicians in Lebanon
| Others |
| APTL | Assets Protection Team Leader
| Others |
| APTL | Association of Part Time Librarians
| Others |
| APTL | Asynchronous Propositional Temporal Logic
| Others |
| APTL | Auto Pump Top Load
| Others |
| APTL | Automatic Power Transfer and Load control
| Others |
| APTL | Automotive Production Technologies Limited
| Others |
| APTL | Automotive Production Technologies Ltd
| Others |
| APTL | Average Passenger Trip Length
| Others |