| IMSP | Illinois Mathematics and Science Partnerships 
| Others |
| IMSP | Independent Manufacturer Support Program
| Others |
| IMSP | Information Management Support Plan
| Others |
| IMSP | Insensitive Munitions Strategic Plan
| Others |
| IMSP | Institute of Mathematical Sciences and Physics
| Others |
| IMSP | Instituto Municipal de Salud Publica
| Others |
| IMSP | Integrated Maritime Spatial Planning
| Others |
| IMSP | Integrated Municipal Sustainability Plan
| Others |
| IMSP | Interactive Mail Support Protocol
| Others |
| IMSP | Interface Module Surge Protection
| Others |
| IMSP | International Medical Scholars Program
| Others |
| IMSP | International Medical Society of Paraplegia
| Others |
| IMSP | International Montessori School of Prague
| Others |
| IMSP | International Music School of Provence
| Others |
| IMSP | Internet Message Support Protocol
| Others |
| IMSP | Inventory Management and Stock Positioning
| Others |
| IMSP | Inventory Management Stock Positioning
| Others |