| APTC | Actors Professional Theatre Conservatory 
| Others |
| APTC | Adler Power Torque Clutch
| Others |
| APTC | Advance Premium Tax Credit
| Others |
| APTC | Advance Premium Tax Credits
| Others |
| APTC | Advanced Physical Therapy Center
| Others |
| APTC | Advanced Platform Technology Center
| Others |
| APTC | Advanced Premium Tax Credit
| Others |
| APTC | Advanced Premium Tax Credits
| Others |
| APTC | Advanced Processor Temperature Control
| Others |
| APTC | Akron Polymer Training Center
| Others |
| APTC | All Pacific Travel Concept
| Others |
| APTC | Allow Partially Trusted Caller
| Others |
| APTC | Allow Partially Trusted Callers
| Others |
| APTC | American Property Tax Counsel
| Others |
| APTC | Annual Proficiency Testing and Certification
| Others |
| APTC | Applied Practicum Training Course
| Others |
| APTC | Arcohe Parent Teacher Club
| Others |
| APTC | Army Physical Training Corps
| Others |
| APTC | Asociacion de Pilotos Turismo del Centro
| Others |
| APTC | Association of Professional Tour Caddies
| Others |
| APTC | Association of Psychology Training Clinics
| Others |
| APTC | Atlantic Pacific Tea Company
| Others |
| APTC | Atlantic Petroleum Training College
| Others |
| APTC | Atlantic Physical Therapy Center
| Others |
| APTC | Atlantic Provinces Telecommunications Council
| Others |
| APTC | Australia Pacific Technical College
| Others |
| APTC | Authorized Prometric Testing Center
| Others |