| Abbreviation | Definition |
|---|---|
| IACVB | International Association of Convention Visitors Bureaus |
| IAMB | Internationaal Anti Militaristisch Bureau |
| IATB | International Auto Theft Bureau |
| IB | The International Bureau |
| IBAR | Interafrican Bureau for Animal |
| IBCB | Internet Business Consumer Bureau |
| IBES | International Bureau for Environmental Studies |
| IBFS | International Bureaus Filing System |
| IBTC | International Bureau For Textile And Clothing |
| IBTC | International Bureau For Textiles And Clothing |
| IBWM | International Bureau Of Weight And Measurements |
| IBWM | International Bureau Of Weights And Measures |
| IBWM | International Bureau Of Weights Measures |
| ICLB | International Criminal Law Bureau |
| ICPB | India Convention Promotion Bureau |
| ICPB | Indian Culture and Promotion Bureau |
| ICTB | Iraqi Counter Terrorism Bureau |
| ICVB | Irving Convention and Visitors Bureau |
| ICVB | Istanbul Convention Visitors Bureau |
| IERB | Islamic Econimics Research Bureau |