| IMAS | Idaho Management and Accountability System 
| Others |
| IMAS | Idaho Marine Aquarium Society
| Others |
| IMAS | Improved Maize for African Soils
| Others |
| IMAS | Industria Meccanica Applicazioni Speciali
| Others |
| IMAS | Institute for Marine and Antarctic Studies
| Others |
| IMAS | Institute of Marine and Antarctic Studies
| Others |
| IMAS | Instituto Mixto de Ayuda Social
| Others |
| IMAS | Integrated Mass Announcement System
| Others |
| IMAS | Intelligent Multiservice Access System
| Others |
| IMAS | International Marine and Shipping Conference
| Others |
| IMAS | International Mine Action Standards
| Others |
| IMAS | International Modern Arabic School
| Others |
| IMAS | International Museum of Art and Science
| Others |
| IMAS | International Museum of Art Science
| Others |
| IMAS | International Music Artist Society
| Others |
| IMAS | Intervertebral Micro Access Surgery
| Others |
| IMAS | Intrastate Mutual Aid System
| Others |
| IMAS | Investment Management Association of Singapore
| Others |
| IMAS | iOS Mobile Application Security
| Others |
| IMAS | Iraqi Mutual Aid Society
| Others |
| IMAS | Islands Medical Assistance Society
| Others |