| Abbreviation | Definition |
|---|---|
| APTS | Apartment Professionals Total Source |
| APTS | Automatic Picture Transmission System |
| APTT | A Place To Talk |
| APTT | Activated Partial Thromboplastic Time |
| APTTA | Afghan Pak Transit Trade Agreement |
| APTTA | Afghan Pakistan Transit and Trade Agreement |
| APTTA | Afghan Pakistan Transit Trade Agreement |
| APTTA | Afghanistan Pakistan Transit Trade Agreement |
| APTU | Adult Psychiatric Treatment Unit |
| APTV | Aktivirano parcijalno tromboplastinsko vrijeme |
| APTW | A Path to Wellness |
| APTW | Achieving Positive Thinking Worldwide |
| APTW | Airport Pavement Technical Workshop |
| APTW | Amide proton transfer weighted |
| APTW | Asia Pacific Training Workshop |
| APTY | American Purple Top Yellow |
| APU | Acid Purification Unit |
| APU | Acres Per Unit |
| APU | Add Penalty Unit |
| APU | Administrative Prosecution Unit |