| Abbreviation | Definition |
|---|---|
| IAW | Infertility Awareness Week |
| IAW | InterAmerican Workshop, Inc. |
| IAW | International Alliance of Women |
| IAWV | International Amazon Workers Voice |
| IBBRA | International Bed Bug Resource Authority |
| IBDA | Inquilabi Blood Donors Association |
| IBF | Indian Broadcasting Foundation |
| IBFA | International Business Foundation Amsterdam |
| IBFA | Israel Barlow Family Association |
| IBFAN | International Baby Food Action Network |
| IBFS | International Ben Franklin Society |
| IBFT | International Benevolent Fund Trust |
| IBIDA | Illinois Branch International Dyslexia Association |
| IBLC | International B-24 Liberator Club |
| IBLF | International Business Leaders Forum |
| IBTL | Institute For Budget And Tax Limitation |
| IBTM | Institute of Business Travel Management |
| IBWA | International Bottled Water Association |
| IBWC | International Black Women's Congress |
| ICA | Interstitial Cystitis Association |