| Acronym | Definition |
|---|
| IMB | International Mission Board |
| IMB | Institute for Molecular Bioscience (Brisbane, Australia) |
| IMB | Intelligent Mail Barcode (USPS) |
| IMB | International Maritime Bureau |
| IMB | Internet and Mobile Banking (various companies) |
| IMB | Irish Medicines Board |
| IMB | Instituto de Microelectronica de Barcelona (Spanish: Barcelona Microelectronics Institute; Barcelona, Spain) |
| IMB | Institute of Medical Biology (Agency for Science, Technology and Research; Singapore) |
| IMB | Integrated Media Block (digital cinema) |
| IMB | Intelligent Mail Barcode |
| IMB | IndyMac Bank (Pasadena, CA) |
| IMB | International Medieval Bibliography (est. 1967; University of Leeds; UK) |
| IMB | Institute for Marine Biosciences (Canada) |
| IMB | International Merchant Bank (Nigeria) |
| IMB | Institute of Management Bhubaneswar (India) |
| IMB | International Marriage Broker |
| IMB | International Management Board |
| IMB | I Am Back |
| IMB | Independent Monitoring Boards (UK) |
| IMB | Istituto di Moda Burgo (Italian fashion design school) |
| IMB | I Am Bored |
| IMB | Intermenstrual Bleeding |
| IMB | Illawarra Mutual Building Society (Australian credit union) |
| IMB | Input Message Buffer |
| IMB | Intel Media Bench |
| IMB | Interoperability Management Board |
| IMB | Initial Medical Board |
| IMB | Ikatan Mahasiswa Biologi Untuk Konservasi Lingkungan |
| IMB | Institut für Molekulare Biotechnologie eV (Institute of Molecular Biotechnology; Germany) |
| IMB | International Marriage Bureau (website) |
| IMB | Instituto Mixto Básico (Guatemalan private school) |
| IMB | Inoffizieller Mitarbeiter zur Beeinflussung (Political Police Influence Agent, GDR) |