| Abbreviation | Definition |
|---|---|
| APPI | Aero Precision Products Inc |
| APPI | Architectural Panel Products Inc |
| APS | Advance Performance System |
| APS | As Per Sample |
| APSM | Advanced Power State Management (Rambus) |
| APT | All Purpose Toilet paper |
| APT9 | Clothing brand |
| APTA | Automotive Products Trade Agreement |
| APTC | Adler Power Torque Clutch |
| APTJ | America's Pride Transmission Jack |
| APTL | Auto Pump Top Load |
| APTP | All Pro Threaded Products |
| APTP | American Patriot Tribute Pistol |
| APUC | Agricultural Products Utilization Commission |
| APUG | ANCILE Products Users Group |
| APV | Advanced Personal Vaporizer |
| APVPC | Application to Pre-Verified Product Categories |
| APW | Average Piece Weight |
| APWP | Alaska Pure Water Products |
| AQ | As Quenched |