| Abbreviation | Definition |
|---|---|
| APNS | Association of Psychologists of Nova Scotia |
| APOBA | Associated Pipe Organ Builders of America |
| APOG | Association of Professors of Obstetrics and Gynaecology |
| APP | Asociación Panameña de Psicólogos (Panamanian Association of Psychologists) |
| APP | Asociación Profesional de Policías |
| APP | Association of Professional Piercers |
| APPA | American Pet Products Association |
| APPA | American Philosophical Practitioners Association |
| APPA | American Probation and Parole Association |
| APPES | Asia Pacific Paediatric Endocrine Society |
| APPI | Association of Physiologists and Pharmacologists of India |
| APPI | Australian Pulp and Paper Institute |
| APPM | Associação Portuguesa dos Profissionais de Marketing |
| APPM | Associated Press Photo Managers |
| APPMA | American Pet Products Manufacturers Association |
| APPT | Association of Private Practice Therapists |
| APQC | American Productivity Quality Center |
| APQC | American Productivity & Quality Center |
| APQC | American Productivity and Quality Center |
| APRA | Alberta Plastics Recycling Association |