| Innovation Management Association of Canada | Academic & Science |
| Interfaith Moral Action on Climate | Academic & Science |
| Independent Medicare Advisory Council | Business |
| Install Move Add Change | Business |
| Ingenious Med | Business |
| International Modal Analysis Conference | Community |
| International Conference on Image Management And Communications | Community |
| International Miniature Aerobatic Club | Community |
| Isochronous Media Access Control | Computing |
| Internet Macintosh | Computing |
| Instructional Media Assistance Center | General |
| Isochronous Media Access Controller | General |
| Immobilized metal ion affinity chromatography | General |
| Indonesia Mazda Auto Club | General |
| Installs Moves Adds and Changes | General |
| Install Move Add and Change | General |
| Integrated Motoring And Analysis Center | Governmental |
| Intensive Multidisciplinary Assessment Camp | Governmental |
| Interim Maximum Acceptable Concentration | Governmental |
| Insurance Managers Association of Cayman | Insurance |
| International Miniature Aerobatic | International |
| International Marketing and Administration Company | International |
| International Movement of the Apostolate of Children | International |
| Instituto de Mediación, Arbitraje y Conciliación | International |
| Internet Macintosh and clicks | Internet |
| Integrative Medicine Advisory Committee | Medical |
| Install, Move, Add, Or Change | Real Estate |
| International Miniature Acrobatic Club | Sports |
