| Abbreviation | Definition |
|---|---|
| APBN | Asia Pacific Biotech News |
| APE | Alternate Press Expo |
| APE | Alternative Press Expo |
| API | Alternative Press Index |
| APIs | Announcements in the public interest |
| APME | Associated Press Managing Editors |
| APMEN | Asia Pacific Metalworking Equipment News |
| APP | Appendix |
| APPI | American Psychiatric Press Inc |
| APRN | An Phoblacht Republican News |
| APSN | Arizona Public Safety News |
| APT | Alabama Public Television |
| AR | Aspect Ratio |
| ARN | Airport Revenue News |
| ARN | Annenberg Radio News |
| ASAAN | Al Sharq Al Awsat Newspaper |
| ASG | Andreas Susan Georgeade |
| ASINH | Negative Hyperbolic Sine |
| ASN | All Sports Network |
| ASNE | American Society of News Editors |