| Microbial Sciences Initiative | Academic & Science |
| Modified Supplemental Instruction | Academic & Science |
| Minority Serving Institution | Academic & Science |
| Masonry and Structural Improvements | Academic & Science |
| Microsoft System Information | Academic & Science |
| Multispeed Internal Clock | Academic & Science |
| Member of Securities Institute | Accounts and Finance |
| Masalembo | Airport Code |
| Ms Intl. | Business |
| Morneau Sobeco Income Fund | Business |
| Multistack International Ltd | Business |
| Motorola Solutions Inc | Business |
| Marketing Science Institute | Business |
| Montgomery Soccer Inc | Business |
| Much Salt Incoming | Business |
| Meeting Services Inc | Business |
| Movie Star, Inc. | Business |
| Molecular Simulations, Incorporated | Business |
| Mayfair Storage Interconnect | Business |
| Macintyre Strater Internatational | Business |
| Management Services Incorporated | Business |
| Metapath Software International | Business |
| Management of Social Interaction | Business |
| Mechanical Systems Inc | Business |
| Multispectral Solutions, Inc. | Business |
| Micro Systems International | Business |
| Management Systems International | Business Management |
| Management Services of Illinois | Business Management |
| Molecular Simulations, Inc. | Chemistry |
| Middle School Instruction | Community |
| Manufacturer Specific Information | Computer and Networking |
| Maximum Symbol Inversion | Computer and Networking |
| Multi Service Interface | Computing |
| Microsoft System Installer | Computing |
| Mobilized Software Initiative | Computing |
| Mobile Services Initiative | Computing |
| Machine Sequence Imaging | Computing |
| Message Service Interface | Computing |
| Message Stream Interface | Computing |
| Mobile Station Identifier | Computing |
| Microprocessor Slave Interface | Computing |
| Managed Service Identity | Computing |
| Minnesota Supercomputing Institute | Computing |
| Media Services Interface | Computing |
| Magnetic Source Imaging | Database Management |
| Microelectronics Society of India | Electronics |
| Music Or Speech Item | Electronics |
| Medical Services Insurance | File Type |
| Manure Spreading Index | General |
| Media Sustainability Index | General |
| Message Signaled Interrupts | General |
| Metabolomics Standards Initiative | General |
| Measurement Systems International | General |
| Meritorious Service Increase | General |
| Medium Scale Integrated | General |
| Micro Start International | General |
| Medium System Integrated | General |
| MAC Satisfaction Indicator | General |
| Migration Series Instruction | General |
| MedShare International | General |
| Maruti Suzuki India | General |
| Multiple Spark Ignition | General |
| Mostra Scambio Imola | General |
| Motor Sports International | General |
| Mando Softtech India | General |
| Motor and Sport Institute | General |
| Mid Season Invitational | General |
| Material Sustainability Index | General |
| Multi Sensor Integration | General |
| Market Standard Indicator | General |
| microsatellite instability If | General |
| Multi Source Inventory | General |
| My Scrotum Itches | General |
| Multiple Source of Income | General |
| Materials Sustainability Index | General |
| Marine Safety Information | General |
| Michigan State Industries | General |
| Measurements Standards and Intercomparisons | General |
| Manufacturing Skills Institute | General |
| Manufacturing Solutions Inc | General |
| Major Service Interruption | General |
| MineSweeper, In-shore | General |
| Maritime Safety Information | Governmental |
| Maintenance Significant Item | Governmental |
| Italian Social Movement | Governmental |
| Minority Serving Institutions | Governmental |
| Marine Science Institute | Governmental |
| Multiple Sources Of Income | Governmental |
| Monseigneur Sencie Institute | Governmental |
| Mountain Studies Institute | Governmental |
| Medium-Scale Integration | Information Technology |
| Message Signaled Interrupt | Information Technology |
| Microsoft Installer | Information Technology |
| Maharishi Sadashiva Isham | Jobs |
| Mean Squared Intercept | Maths |
| Micro Structured Implant | Medical |
| Mindless Self Indulgence | Messaging |
| Micro-star International | Messaging |
| Modified Surface Index | Military and Defence |
| Multispectral Imagery | Military and Defence |
| First Year of Military Science | Military and Defence |
| Mobile Software Initiative | Softwares |
| Man-system Integration | Softwares |
| Microsoft Software Installation | Softwares |
| Maintenance Significant Items | Space Science |
| Microsatellite Instability | Space Science |
