| Abbreviation | Definition |
|---|---|
| APNI | Association Pointe Noire Industrielle |
| APNI | Au Pair Network International |
| APNK | Aotearoa People's Network Kaharoa |
| APNO | All Purpose Nipple Ointment |
| APNO | Atomic Pair Natural Orbital |
| APNR | Adhesion Promoter No Rinse |
| APNR | Associated Private Nature Reserves |
| APNS | Apple Push Notification Servers |
| APNS | Apple Push Notification service |
| APNSA | Assistant to the President for National Security Affairs |
| APNT | Allergy Partners of North Texas |
| APNT | Alternate Position Navigation and Timing |
| APNT | Alternative Position Navigation and Timing |
| APNT | Alternative Position Navigation Timing |
| APNT | Alternative Positioning Navigation and Timing |
| APNT | Assured Positioning Navigation and Timing |
| APO | A Perfect Opportunity |
| APO | Accredited Parking Organization |
| APO | Adjusted Plan Options |
| APO | AIDS Project of the Ozarks |