| Rank | Abbreviation | Meaning |
|---|
| ***** | IAPI | Instituto de Aposentadoria e Pensões dos Industriários
| |
| ***** | IAPI | Instituto Angolano da Propriedade Industrial
| |
| ***** | IAPI | International AIDS Prevention Initiative
| |
| ***** | IAPI | Internet Application Programming Interface
| |
| ***** | IAPI | Ikatan Ahli Patologi Indonesia
| |
| **** | IAPI | Italian Association of Private Investigators
| |
| **** | IAPI | Iowa Association of Private Investigators
| |
| **** | IAPI | International Association of Periodontologists and Implantologists
| |
| **** | IAPI | Indiana Association of Private Investigators
| |
| *** | IAPI | Iowa Assoc of Private Investigators
| |
| *** | IAPI | Iowa Association of Professional Investigators
| |
| *** | IAPI | Indiana Association of Professional Investigators
| |
| ** | IAPI | Instituto Argentino Para Intercambio
| |
| * | IAPI | Institute of Applied Informatics
| |
| * | IAPI | Institute of Advertising Practitioners of Ireland
| |
| * | IAPI | iMpower Application Programming Interface
| |
| * | IAPI | Institute of Advertising Practioners
| |
| * | IAPI | Internationally Adopted Post Institutionalized
| |
| * | IAPI | Iowa Aging Program Instructions
| |