| Abbreviation | Definition |
|---|---|
| APA | Administrative Procedure Act |
| APA | Administrative Procedures Act |
| APAA | Asian Patent Attorneys Association |
| APALC | Asian Pacific American Legal Center |
| APALC | Asian Pacific American Legal Center of Southern California |
| APAT | Andhra Pradesh Administrative Tribunal (India) |
| APB | All Points Bulletin |
| APC | Angled Physical Contact |
| APCJ | Applied Psychology in Criminal Justice |
| APCO | Associated Public-Safety Communications Officers |
| APD | Albuquerque Police Department |
| APHC | Andhra Pradesh High Court |
| API | Affluent Parents Index |
| APIB | Alabama Private Investigation Board |
| APIL | Association of Person Injury Lawyers |
| APIL | Association of Public Interest Law |
| APIPA | Asia Pacific Intellectual Property Association |
| APIU | Australian Paranormal Investigation Unit |
| APJ | Artists for Peace and Justice |
| APLA | Association for Political Legal Anthropology |