| ACPD | Advisory Commission on Public Diplomacy 
| Others |
| ACPD | Albemarle County Police Department
| Others |
| ACPD | Alexandria Commission on Persons with Disabilities
| Others |
| ACPD | Alternating Current Potential Drop
| Others |
| ACPD | Amherst College Police Department
| Others |
| ACPD | Amman Center for Peace and Development
| Others |
| ACPD | Anyone Can Play Drums
| Others |
| ACPD | Arlington County Police Department
| Others |
| ACPD | Asamblea Consultiva de las Poblaciones Desarraigadas
| Others |
| ACPD | Association Canadienne des Professeurs de Droit
| Others |
| ACPD | Atlantic City Police Department
| Others |
| ACPD | Atmos Chem Phys Discuss
| Others |
| ACPD | Atmospheric Chemistry and Physics Discussions
| Others |
| ACPD | Auraria Campus Police Department
| Others |
| ACPD | Auxins and Cytokinins in Plant Development
| Others |
| ACPD | Aviation Consumer Protection Division
| Others |
| ACPD | Canadian Association of Law Teachers
| Others |