| Interdisciplinary Mathematics Institute | Academic & Science |
| International Meteorological Institute | Academic & Science |
| Inhomogeneous Markov Interval | Academic & Science |
| Irving Materials Inc | Business |
| Increasing Magnitude of Interest | Business |
| Icetratt Music, Inc. | Business |
| Investment Management Institution | Business |
| Industrial Magnetics Inc | Business |
| Information Management Institute | Business |
| International Market Insight | Business |
| San Paolo- Imi, S. P. A. | Business |
| International Marine Incorporated | Business |
| Innovative Manufacturing Initiative | Business |
| Israel Military Industries | Business |
| Integrated Mobile, Inc. | Business |
| Impression Management, Inc. | Business |
| Integrated Micro Instruments | Business |
| Integrated Micro Instrument | Business |
| International Masonry Institute | Business |
| IMI, PLC. | Business |
| IM Medical Ltd | Business |
| International Memories Inc. | Computing |
| Integrated Managed Infrastructure | Computing |
| Institutul de Matematica Si Informatica | Computing |
| I Mean It | Computing |
| Influencer | Cryptocurrency |
| Its Mission of Integrating | General |
| Intelligent Multimedia Interface | General |
| Innovative Medecines Initiative | General |
| Industrial Monitoring Instrumentation | General |
| Internal Market Information | General |
| Input Measure Index | General |
| Imperial Metal Industries | General |
| Intraday Momentum Index | General |
| Investable Market Index | General |
| Interactive Multimedia Instruction | General |
| Intelligent Multifunctional Identity | General |
| Institute of the Motor Industry | General |
| Isuzu Motors India | General |
| Ikatan Motor Indonesia | General |
| Incoming Material Inspection | General |
| International Morse Code | General |
| Innovative Medicines Initiative | General |
| International Mediation Institute | Governmental |
| Illinois Mining Institute | Governmental |
| Industrial Materials Institute | Governmental |
| Iraqi Minister of Information | Governmental |
| International Military Information | Governmental |
| International Materials Institute | International |
| International Mahayana Institute | International |
| International Management Institute | International |
| International Media Ideas | International |
| Internet Marketing Inc | Internet |
| Inverness Medical Imaging | Medical |
| Intramammary Infection | Medical |
| Intra-Muscular Injection | Medical |
| Ine Island, Marshall Islands | Regional |
