| Abbreviation | Definition |
|---|---|
| APS | Asset Positioning System |
| APS | Auto Pilot System |
| APSA | Airline Pilots Security Alliance |
| APSRTC | Andhra Pradesh Road Transport Corporation |
| APSRTC | Andhra Pradesh State Road Transport Corporation |
| APT | Accelerated Pavement Testing |
| APT | Advanced Performance Tuning |
| APT | All Purpose Traction |
| APT | Arranged Passenger Transport |
| APT | Assumed Points To .... |
| APT | Attitude, Power, Trim |
| APT | Automatic Package Transfer |
| APTA | American Public Transit Association |
| APTA | American Public Transportation Association |
| APTRG | Active and Passenger Transport Reference Group (Australia) |
| APTS | Advanced Public Transportation System |
| APTS | Advanced Public Transportation Systems |
| APTS | Ariesadvanced Public Transportation Systems |
| APTU | Antwerpse Provinciale Taxi Unie |
| APV | Adelaide Performance Vehicle |