| IMMA | Indiana Municipal Management Association 
| Others |
| IMMA | Institute of Memory and Alzheimer's [disease]
| Others |
| IMMA | Insured Money Management Account
| Others |
| IMMA | Insured Money Market Account
| Others |
| IMMA | Integrated Mobility Management Architecture
| Others |
| IMMA | International Management and Marketing Associates
| Others |
| IMMA | International Management Marketing Academy
| Others |
| IMMA | International Marine Mammal Association
| Others |
| IMMA | International Marine Mammal Association, Inc.
| Others |
| IMMA | International Menuhin Music Academy
| Others |
| IMMA | International Motorcycle Manufacturers
| Others |
| IMMA | International Motorcycle Manufacturers Association
| Others |
| IMMA | Intl Meta Medicine Association
| Others |
| IMMA | Ion Microphobe Mass Analysis
| Others |
| IMMA | Irish Museum of Modern Art
| Others |