| Abbreviation | Definition |
|---|---|
| MBI | Microproducts Breakthrough Institute |
| MBI | Midwest Biodiversity Institute |
| MBITS | Mar Baselios Institute of Technology and Science |
| MBNI | Molecular and Behavioral Neuroscience Institute |
| MBNI | Molecular Behavioral Neuroscience Institute |
| MBRI | Margaret Byrd Rawson Institute |
| MBRI | Monetary and Banking Research Institute |
| MBSI | Mind Body Spirit Institute |
| MCCI | Monmouth County Correctional Institution |
| MCCI | Montessori Catechetical and Cultural Institute |
| MCI | Maine Central Institute |
| MCI | Major Cultural Institutions |
| MCI | Massachusetts Committing Institution |
| MCIF | Montana Cancer Institute Foundation |
| MCIM | Member Chartered Institute of Management |
| MCIM | Member of the Chartered Institute of Marketing |
| MCIOB | Member of Chartered Institute Of Building |
| MCIPO | Muhlenberg College Institute of Public Opinion |
| MCIPS | Member of Chartered Institute of Purchasing and Supply |
| MCIPS | Member of the Chartered Institute of Procurement and Supply |