| Abbreviation | Definition |
|---|---|
| APPU | Asian Pacific Postal Union |
| APR | Air Purifying Respirator |
| APR | Memory Address Register |
| APR | Advisory and Payment Request |
| APR | Always Playing Roots |
| APR | Agricultural Preservation Reservation |
| APR | Arizona Pylon Racing |
| APR | Average Penalty Received |
| APR | Admission to Practice Rules |
| APR | Apache Portable Runtime |
| APR | Airborne Profile Recorder |
| APR | Annual Percentage Rate |
| APR | Automatic Payment Receipt |
| APR | Annualized Percentage Rate |
| APR | Annual Performance Report |
| APR | Annual Percentage Rates |
| APRA | Arizona Pylon Racing Association |
| APRA | American Professional Rodeo Association |
| APRP | Acidic Proline-rich Protein |
| APRS | Automatic Packet Reporting System |
| APRS | Association of Professional Recording Services |
| APRS | Automatic Position Reporting System |
| APRU | Agriculture Policy Research Unit |
| APRU | Agricultural Policy Research Unit |
| APS | Auxiliary Power System |
| APS | Institute of Electrical and Electronic Engineers Antennas and Propagation Society |
| APS | Active Positive Symbiosis |
| APS | Anti Phospholipid Syndrome |
| APS | Absolutely Precious Skin |
| APS | Advance Photo System |
| APS | Agricultural Production Specialist |
| APS | Acceleration And Pre Separation |
| APS | Advanced Positioning Sensor |
| APS | Auxiliary Power Supply |
| APS | Automated Payload Switch |
| APS | Acquisition Processor Subsystem |
| APS | Airway Planning Standard |
| APS | Asset Positioning System |
| APS | Active Point System |
| APS | Auto Pilot System |
| APS | Advanced Photo System |
| APS | All Programs And Sounds |
| APS | Air Precision Shooting |
| APS | Adult Protective Services |
| APS | Attending Physician's Statement |
| APS | Attorneys' Process Service |
| APS | Ability Point Skill |
| APS | Active Pixel Sensor |
| APS | Active Phase Switching |
| APS | Accelerated Promotion Scheme |