| Acronym | Definition |
|---|
| IMP | Important |
| IMP | Internet Messaging Program |
| IMP | Impression |
| IMP | International Masters Publishers |
| IMP | Impasse (French: Dead End; Canada Post street designation) |
| IMP | Interface Message Processor (ARPANET) |
| IMP | Imperator (Latin: Emperor) |
| IMP | Imperator |
| IMP | Interactive Mathematics Program |
| IMP | Inosine 5'-Monophosphate |
| IMP | Impracticable |
| IMP | Instituto Mexicano del Petroleo |
| IMP | Isle of Man Pound (ISO currency code) |
| IMP | Imager for Mars Pathfinder |
| IMP | Institut Médico-Pédagogique (French: Medical-Pedagogical Institute) |
| IMP | Integrated Master Plan |
| IMP | Investigational Medicinal Product (European Union) |
| iMP | Information Impacts (magazine) |
| IMP | Interplanetary Monitoring Platform |
| IMP | Interplanetary Monitoring Platform (Explorer satellites) |
| IMP | Imperforate (philately) |
| IMP | Imperviousness |
| IMP | Integrated Management Plan |
| IMP | Imperatrix |
| IMP | Institutional Master Plan |
| IMP | International Marketing and Purchasing (Group) |
| IMP | It's My Pleasure (Internet slang) |
| IMP | Incident Management Plan |
| IMP | Institut für Medizinische Psychologie (Institute of Medical Psychology, LMU Germany) |
| IMP | Inventory Management Plan |
| IMP | Improve/Improved |
| IMP | Institute of Medical Physics (Erlangen, Germany) |
| IMP | International Match Points (bridge game) |
| IMP | Invisible Mic Preamp |
| IMP | Information Management Plan |
| IMP | International Museum of Photography |
| IMP | Intrinsic Membrane Protein |
| IMP | Institute of Materials Processing (Michigan) |
| IMP | Information Management Practices |
| IMP | Imperatriz, Maranhao, Brazil (Airport Code) |
| IMP | Internet Message Processor (less common) |
| IMP | Ill Mannered Playas (rap group) |
| IMP | Integrated Mediterranean Programme |
| IMP | Ionized Metal Plasma |
| IMP | Institute of Microwaves and Photonics |
| IMP | Intelligent Mark Positioning (Virtek Company) |
| IMP | Input Message Processor |
| IMP | International Moron Patrol (internet flash-cartoon series) |
| IMP | Integrated Monitor Panel |
| IMP | Institute of Molecular Physics (Moscow, Russia) |
| IMP | Implementation and Monitoring Plan |
| IMP | Instructional Management Plan |
| IMP | Implementation Management Plan |
| IMP | Integrated Mail Processor |
| IMP | Industrial Mobilization Plan |
| IMP | Installation Master Plan |
| IMP | Instructional Media Package |
| IMP | Input Message Processing |
| IMP | Inter-Modulation Product |
| IMP | Individual Meal Package |
| IMP | Intelligent Processing of Materials |
| IMP | Interface Management Plan |
| IMP | Interline Message Procedure |
| IMP | Input Method Profiler (Microsoft) |
| IMP | Internet Modem Protocol |
| IMP | Item Management Plan |
| IMP | Intelligent Machine Post |
| IMP | Invited Medical Personnel |
| IMP | Inbound Message Processor |
| IMP | Infrastructure Modernization Plan |
| IMP | Intelligence Message Processor |
| IMP | Improved Maintenance Plan/Program |
| IMP | In-service Management Panel |
| IMP | Initial Military Program |
| IMP | Infantry Mortar Plan |
| IMP | Initial Modeling Step |
| IMP | Integrated Modernization Period |
| IMP | Integrated Maintenance Procedure |
| IMP | Intermodule Packet |
| IMP | Interoperability/Integrated Management Plan |
| IMP | ICF Media Platform |
| IMP | In-Mould Painting (injection molding of pastic parts) |
| IMP | Injected Metal Products (component assemblies produced using a die casting technique) |
| IMP | Incubadora de Microempresas Productivas (Bolivia microfinance) |
| IMP | Institute for Metal Physics (Ukraine) |
| IMP | InterMedium Publishers (Netherlands) |
| IMP | Indiana Michigan Power (utility) |
| IMP | Implantation |
| IMP | Image Product |
| IMP | Instrumental Music Program (various organizations) |