| Abbreviation | Definition |
|---|---|
| AP | Application Processor |
| APB | Advanced Peripheral Bus |
| APBS | Adjustable Plastic Bayonet Sensor |
| APC | Analog-to-Packet Converter |
| APDU | Application Processing Data Unit |
| APF | All-Pass Filter |
| APIC | Advance Programmable Interrupt Controller |
| APIC | ATM Port Interconnect Controller |
| APM | Adaptive Power Management |
| APM | Advanced Power Management |
| APMS | Advanced Precision Measurement System |
| APO | Automatic Power Off |
| APPI | Associated Press Printer Interface |
| APS | Active Phase Switching |
| APTA | Austrian Platform for Telematics Application |
| APU | Accelerated Processing Unit |
| APU | Accelerated Processing Units |
| APU | Audio Processing Unit |
| APU | Auxiliary Power Unit |
| AQUA | Amino Qnx Unified Architecture |