| Acronym | Definition |
|---|
| IMS | I Must Say |
| IMS | Infrastructure Managed Services |
| IMS | Institute of Mathematical Statistics |
| IMS | International Microwave Symposium (IEEE) |
| IMS | International Monitoring System (PIDC and CTBT) |
| IMS | Indianapolis Motor Speedway |
| IMS | Integrated Management System |
| IMS | Information Management System |
| IMS | Institute of Materials Science (University of Connecticut) |
| IMS | Insight Meditation Society |
| IMS | Institute of Marine Sciences |
| IMS | International Military Staff (NATO) |
| IMS | Instructional Management System |
| IMS | Institute for Molecular Science |
| IMS | Institute of Medical Sciences (various universities) |
| IMS | I Am Sorry |
| IMS | Incident Management System |
| IMS | Ion Mobility Spectrometry |
| IMS | Inventory Management System |
| IMS | Institut für Mikroelektronische Schaltungen und Systeme (Dresden, Germany) |
| IMS | Fraunhofer Institut für Mikroelektronische Schaltungen und Systeme |
| IMS | If Modified Since (Squid) |
| IMS | Instant Messaging Service |
| IMS | Interim Management Statement |
| IMS | Integrated Master Schedule (US DoD systems acquisition) |
| IMS | Internet Mail Service |
| IMS | International Motorcycle Show (New York) |
| IMS | Internet Map Service |
| IMS | IP Multimedia Subsystems |
| IMS | Immunomagnetic Separation (laboratory tool) |
| IMS | Information Management Software (IBM DB2 IMS) |
| IMS | Irritable Male Syndrome |
| IMS | If Memory Serves |
| IMS | Institute for Microstructural Sciences (National Research Council, Canada) |
| IMS | Identity Management System |
| IMS | Interactive Multimedia Services |
| IMS | Iowa Medical Society |
| IMS | Integrated Marketing Services |
| IMS | Irish Mathematical Society (Ireland) |
| IMS | Internet Multicasting Service |
| IMS | Institute of Management Sciences |
| IMS | International Meat Secretariat |
| IMS | Ion Mobility Spectroscopy |
| IMS | Inventory Management Solutions |
| IMS | Intellisync Mobile Suite |
| IMS | Interactive Marketing Solutions |
| IMS | Intelligent Manufacturing System |
| IMS | Instructional Materials Service (curriculum development center for agricultural, trade, and industrial education) |
| IMS | Internet Multimedia Subsystem |
| IMS | Ion Mass Spectrometer |
| IMS | Instrumentation and Measurement Society (IEEE) |
| IMS | International Magicians Society |
| IMS | International Measurement System (sailing yacht handicapping system) |
| IMS | Interstate Milk Shippers (US FDA) |
| IMS | Industrial Methylated Spirit |
| IMS | Indian Medical Service |
| IMS | Indian Mini Satellite |
| IMS | Integrated Medical Systems, Inc. (Birmingham, AL) |
| IMS | Center for Intelligent Maintenance Systems (University of Wisconsin at Milwaukee) |
| IMS | International Media Services |
| IMS | Institute for Mathematical Statistics |
| IMS | Information Management Specialist |
| IMS | International Magnetospheric Study |
| IMS | International Military Student |
| IMS | Independent Mobility Systems |
| IMS | Internet Management System |
| IMS | Institute of Management Services |
| IMS | Institute of Manpower Studies |
| IMS | Interim Management Services |
| IMS | Indian Mathematical Society |
| IMS | Information Management Staff |
| IMS | Interagency Management System |
| IMS | Interception Management System |
| IMS | Ice Mapping System |
| IMS | International Meta Systems |
| IMS | Interactive Multimedia Server |
| IMS | Inventory Management Specialist |
| IMS | Integrated Measurement System |
| IMS | Infomercial Monitoring Service, Inc |
| IMS | Inertial Measurement System |
| IMS | Intermediate Maintenance Standards |
| IMS | Intelligent Munition System (Army) |
| IMS | Infrastructure Management Suite |
| IMS | Indian Missionary Society |
| IMS | Institute of Management Specialists |
| IMS | Integrated Motor Assist (Honda) |
| IMS | Issues Management System |
| IMS | International Motor Sports Ltd. |
| IMS | Institutional Management System |
| IMS | Integrated Messaging Service |
| IMS | Integrated Maritime Surveillance |
| IMS | Interactive Meeting Solutions |
| IMS | International Workshop on Measurement Systems (for Homeland Security) |
| IMS | Ingomar Middle School (Pennsylvania) |
| IMS | Iterative Modulo Scheduling |
| IMS | Image Management Systems, Inc. (New York City) |
| IMS | International Market Selection |
| IMS | Internet Protocol Multimedia Service |
| IMS | Index Management Service (SAP) |
| IMS | Injection Molded Soldering |
| IMS | international military standardization (US DoD) |
| IMS | Information Management Society (Medical Group Management Association) |
| IMS | Industrial Management Society |
| IMS | Installation Management System |
| IMS | Imagery Management System |
| IMS | Institut Mondial des Sciences (World Institute of Science) |
| IMS | Image Microsystems Inc. |
| IMS | International Marketing & Sales Group Ltd |
| IMS | Indianola Middle School (Iowa) |
| IMS | Image Movement Signal (Corollary Discharge Theory) |
| IMS | Incomplete Model Space |
| IMS | Internetworking Management System |
| IMS | Institutional Management Support (NASA) |
| IMS | Interleaved Memory System |
| IMS | Interprocess Message Switch |
| IMS | Installed Base Maintenance and Support (Systems Applications and Products) |
| IMS | Intertank Matching Section |
| IMS | Improved Mooring System (US Navy) |
| IMS | Ice Mountain Splash (amusement park ride) |
| IMS | International Monitoring Staff (FGIS) |
| IMS | Imagery Manipulation Services |
| IMS | Isolated Metal Substrates |
| IMS | Intermediate Matching Section |
| IMS | International Mezzotint Society |
| IMS | Integrated Military Systems |
| IMS | Institute for Mechatronic Systems (Winterthur, Switzerland) |
| IMS | Illustration Management System |
| IMS | In-situ Magnetic Sensor |
| IMS | Input Message Show |
| IMS | Intermediate Maintenance Service |
| IMS | Integrated Memory Subsystem |
| IMS | Inventory Management and Simulation |
| IMS | Interference Mitigation Schedule |
| IMS | International Management Services, Incorporated |
| IMS | International Meteorological Station |
| IMS | Inertial Measuring Set |
| IMS | Infected Median Sternotomy |
| IMS | Indirect Maintenance Support |
| IMS | Indicators Monitoring Survey |
| IMS | Instituto Moreira Salles (Brazilian institute; est. 1991) |
| IMS | Integrated Media Solutions (various locations) |
| IMS | Inventory Management Software |
| IMS | Information Management Strategy (various locations) |
| IMS | International Medical School |
| IMS | Institute for Mediterranean Studies (Crete) |