| Abbreviation | Definition |
|---|---|
| API | A Profit Increase |
| API | Academic Perofrmance Index |
| API | Advance Programming Interface |
| API | Alternative Press Index |
| API | Analytical Profile Index |
| API | And Perhaps I |
| API | Applcation Program Interface |
| API | Application Program Interface |
| API | Application Programmable Interface |
| API | Application Programmer Interface |
| API | Application Programming Interfacing |
| API | Arithmetic Processor Interface |
| API | Arnold P Ishnikov |
| API | Asian Pacific Islander |
| API | Astral Projection Isle |
| API | Automated Pellet Inspection |
| API | Automated Processes Inc |
| API | Automotive Professionals Inc |
| APIA | Aleut Pribilof Islands Association |
| APIA | Aleutian Pribilof Islands Association |