| Abbreviation | Definition |
|---|---|
| APAAC | Advertisement Promotion and Analysis Center |
| APAPI | Abbreviated Precision Approach Path Indicator |
| APBS | Automated Parcel Bundle System |
| APCM | Auxiliary Powertrain Control Module |
| APDO | Anti-Perspirant/Deodorant |
| APDV | Advanced Pro-series Digital Variable ignition |
| APECS | Advanced Personal Environmental Controller System |
| APEDA | Agricultural Products Export Development Authority |
| APFC | Automatic Power Factor Controller |
| APHD | Adjustable Pushrods for Harley-Davidson |
| APHF | Aqua-Pure Hand-held shower Filter |
| APHH | Aqua-Pure Hand-Held shower |
| API | All Parts In |
| API | Armor Piercing Incendiary ammunition round |
| APL | Approved Products List |
| APL | Assistive Products List |
| APM | All Purpose Machine |
| APNA | Alarm Positioned Near Appliance |
| APOP | Approved Paint On Parts |
| APP | Alcon Practice Performance |