| Acronym | Definition |
|---|
| MSI➣Medium-Scale Integration (digital/electrical engineering) |
| MSI➣Micro-Star International |
| MSI➣Microsoft Installer (file extension) |
| MSI➣Management Systems International (Washington, DC) |
| MSI➣Mid-Season Invitational (gaming contest) |
| MSI➣Mindless Self Indulgence (band) |
| MSI➣Marketing Science Institute |
| MSI➣Movimento Sociale Italiano (Italian political party) |
| MSI➣Microsatellite Instability |
| MSI➣Museum of Science and Industry (Chicago, IL) |
| MSI➣Measurement Specialties, Inc. (various companies) |
| MSI➣Mass Spectrometry Imaging |
| MSI➣Maruti Suzuki India (car manufacturer) |
| MSI➣Medical Supply, Inc. (various locations) |
| MSI➣Marie Stopes International (London, UK) |
| MSI➣Musculoskeletal Injury |
| MSI➣Magister Sains (Indonesian: Master of Science) |
| MSI➣Mitsui Sumitomo Insurance (various insurances) |
| MSI➣Management Software, Inc. (various locations) |
| MSI➣Multiple Streams of Income |
| MSI➣Mechanical Services, Inc. (various locations) |
| MSI➣Months Supply of Inventory (real estate) |
| MSI➣Measurement Systems Inc. (Ultra Electronics; Wallingford, CT) |
| MSI➣Molecular Simulations, Inc. (various locations) |
| MSI➣Municipal Sustainability Initiative (Canada) |
| MSI➣Minority-Serving Institution |
| MSI➣Micro Star International |
| MSI➣Microprocessor Slave Interface |
| MSI➣Medium Scale Integration |
| MSI➣Message Stream Interface |
| MSI➣Mobile Station Identifier |
| MSI➣Machine Sequence Imaging |
| MSI➣Message Service Interface |
| MSI➣Mobilized Software Initiative |
| MSI➣Message Signaled Interrupt |
| MSI➣Mobile Services Initiative |
| MSI➣Microsoft System Installer |
| MSI➣Mechanical Solutions, Inc. (Whippany, NJ) |
| MSI➣Multispectral Imager |
| MSI➣Management Services Inc |
| MSI➣Multi-Spectral Imagery (US DoD) |
| MSI➣Multi-Systems, Inc. |
| MSI➣Magnetic Source Imaging |
| MSI➣Medical Services International (various organizations) |
| MSI➣Market Strategies International (Livonia, MI) |
| MSI➣Message Signaled Interrupt (PCI) |
| MSI➣Maritime Safety Information |
| MSI➣Multi-Stakeholder Initiative |
| MSI➣Manufacturing Systems, Inc. (various locations) |
| MSI➣Micro Systems, Inc. |
| MSI➣Mix Speakers, Inc. (Japanese rock band) |
| MSI➣Millennium Software, Inc. (various locations) |
| MSI➣Master of Science in Information |
| MSI➣Monetary Services Index |
| MSI➣Media Sports Investments (London, UK) |
| MSI➣Mine Subsidence Insurance (various locations) |
| MSI➣Mustang Software, Inc. |
| MSI➣Media Sales Institute (program) |
| MSI➣Medicine Shoppe International, Inc. (Cardinal Health; various locations) |
| MSI➣Microbial Sciences Initiative (Harvard University; Boston, MA) |
| MSI➣Microstrategy Inc. |
| MSI➣Morneau Sobeco Income (Canada) |
| MSI➣Medicare Supplemental Insurance |
| MSI➣Multi-Source Integration (electronic signatures) |
| MSI➣Messe Stuttgart International (Germany) |
| MSI➣Middle School Initiative (various locations) |
| MSI➣Media Sciences International (ink toner manufacture) |
| MSI➣Mindless Self Indulgance (band) |
| MSI➣Member of the Securities Institute |
| MSI➣Mutual Service Casualty Insurance Co. |
| MSI➣Management Simulations, Inc. |
| MSI➣Metapath Software International |
| MSI➣Morning Star Institute (Washington, DC) |
| MSI➣Mechanical and Structural Inspection |
| MSI➣Mass Storage Interface |
| MSI➣Multi Sensor Integration |
| MSI➣Marine Systems Inc. (Kirby Corporation) |
| MSI➣Marine Systems International (New Brunswick, Canada) |
| MSI➣Mental Sciences Institute (University of Texas Health Science Center at Houston) |
| MSI➣Management Science Institute |
| MSI➣Magna Services Inc. |
| MSI➣Medium Scale Industries |
| MSI➣Thousand Square Inches (area unit) |
| MSI➣Maintenance Significant Item |
| MSI➣Mass Spectrometry Instruments Ltd. (UK) |
| MSI➣Minesweeper, Inshore |
| MSI➣Mascaro Sustainability Initiative (University of Pittsburgh; Pennsylvania) |
| MSI➣Modified Surf Index |
| MSI➣Manufacturers Sales Incentive (automobile sales) |
| MSI➣Multi-Simulator Interface |
| MSI➣Manufacturing Support Item |
| MSI➣Missão para a Sociedade da Informação (Portugal) |
| MSI➣More Stupid Initials (band) |
| MSI➣Monolithic Spiral Inductor (microwave technology) |
| MSI➣Missile Sentencing Inspection |
| MSI➣Manufacturer Specific Information |
| MSI➣Metropolitan Steel, Inc. (Lansing, IL) |
| MSI➣Mobilized Systems Inc. |
| MSI➣Multi-Source, Inc. |
| MSI➣Main Street Initiatives (Pottstown, PA) |
| MSI➣Military Science I (first-year ROTC cadet) |
| MSI➣Motor Sports International |
| MSI➣Morpho-Semantic Indexing |
| MSI➣Marketing, Strategy and Innovation (The Coca-Cola Company) |
| MSI➣Mission Store Interface |
| MSI➣Military Skills Instructor |
| MSI➣Maximum Symbol Inversion |
| MSI➣Maintenance Staff Instruction |
| MSI➣Major Service Interruption |
| MSI➣Member Satisfaction Index (various organizations) |
| MSI➣Market Statistics, Inc. |
| MSI➣Multisystem Integration |
| MSI➣Maryland Sheriffs' Institute |
| MSI➣Military Standard Item |
| MSI➣Man-System Interface |
| MSI➣Mustang Supply, Inc. |
| MSI➣Maintenance Standard Instructions |
| MSI➣Makiling School, Inc (Laguna, Philippines) |
| MSI➣Microprocessor Serial Interface |
| MSI➣Master of Strategic Intelligence (degree) |
| MSI➣Main Synthetic Intelligence (gaming) |
| MSI➣Mouse Subinoculation |
| MSI➣Merit Salary Increment |
| MSI➣Mass Sensors, Inc (St. Louis, MO) |
| MSI➣MoreStudios, Inc. (marketing and design firm) |
| MSI➣Missile System Interface |
| MSI➣Military Service Indicator |
| MSI➣McDermott Shipbuilding, Inc. |
| MSI➣Maximum Security Installation |
| MSI➣Multispectral Scan Imaging |
| MSI➣Management Support Item |
| MSI➣Multisensor/Multisource Interaction |
| MSI➣Munitions Storage Igloo |
| MSI➣Material Strength Index |
| MSI➣Multisignal Interconnect |
| MSI➣Missionary Sisters of Immaculate |
| MSI➣Market Strategy Implementation |
| MSI➣Manpower Standard Implementation (US DoD) |