| Abbreviation | Definition |
|---|---|
| IOCD | International Organization for Chemical Sciences in Development |
| IOCE | International Organisation for Cooperation in Evaluation |
| IOCF | Imperial Oil Centre Foundation |
| IOCF | Institute Of Civil Funerals |
| IOCG | International Organization for Crytal Growth |
| IOCH | Immunization and Other Child Health project |
| IOCN | Institute Of Christian Nursing |
| IOCN | Internationaal Opera Centrum Nederland |
| IOCO | Iraqi Orphan Care Organisation |
| IOCP | International Organisation of Creole People |
| IOCR | International Organization for Clinical Research |
| IOCS | Institute for Online Consumer Studies |
| IOCS | Institute for Orthodox Christian Studies |
| IOCS | International Organization for Community Sharing |
| IOCU | International Organization of Consumers Unions |
| IOCV | International Organization of Citrus Virologists |
| IOD | Institute Of Disability |
| IOD | Integrative Oceanography Division, Scripps Institute of Oceanography |
| IODC | International Organ Donor Coalition |
| IODE | Imperial Order Daughters of the Empire |