| Abbreviation | Definition |
|---|---|
| APEC | Advanced Power Electronics Corporation |
| APEC | Automated Process Equipment Corporation |
| APECS | Anthony Philip Eccles Casting Service |
| APEI | American Public Education Inc |
| APEPDCL | Andhra Pradesh Eastern Power Distribution Company Limited |
| APEPDCL | Andhra Pradesh Eastern Power Distribution Company Ltd |
| APFI | Arnel Pineda Foundation Inc |
| APFI | Ashley Purdy Fashion Inc. |
| APFPM | All Pro Flathead Property Management |
| APGCL | Assam Power Generation Corporation Limited |
| APGCL | Assam Power Generation Corporation Ltd |
| APGI | Alcoa Power Generating Inc |
| APGI | American Power Group Inc |
| APGI | Assurance Protection Group Inc |
| APH | Advanced Paranormal Humans |
| APH | American Printing House for the Blind, Inc. |
| APHB | American Printing House for the Blind |
| APHC | Anglo-Philippine Holdings Corporation |
| APHMEL | Andhra Pradesh Heavy Machinery Engineering Ltd |
| API | American Pirate Industries |