| Maximal Independent Set | Academic & Science |
| Munich International School | Academic & Science |
| Management Indicator Species | Academic & Science |
| Multi-angle Imaging Spectrometer | Academic & Science |
| Marine Isotope Stage | Academic & Science |
| Marine Isotopic Stage | Academic & Science |
| Master of Information Science | Academic & Science |
| Mordern Industrial Societies | Academic & Science |
| Management of Information Systems | Academic & Science |
| Misima Island | Airport Code |
| Midcoast Internet Solutions | Business |
| Millfield Information Support | Business |
| Michael Industries Systems | Business |
| Medical Implant System | Business |
| Manager Instruction Sheet | Business |
| Marketing Intelligence Survey | Business |
| Marketable Investment Securities | Business |
| Major Investment Study | Business |
| Management Integration Server | Business |
| Marketing Institute of Singapore | Business |
| Mobile Interactive Solution | Business |
| Months In Service | Business |
| Management Information Summary | Business Management |
| Management | Business Management |
| Most Important Story | Community |
| Mooresville Intermediate School | Community |
| Musical Instrument Samples | Community |
| Model International School | Community |
| Membership Information System | Community |
| McCulloch Intermediate School | Community |
| Makuhari International School | Community |
| Marion Intermediate School | Community |
| Miraleste Intermediate School | Community |
| Major Information Systems | Computing |
| Multimedia Information Sources | Computing |
| Mobile Information Server | Computing |
| Mastering Interface System | Computing |
| Message Identification Service | Computing |
| Microsoft Information Store | Computing |
| Money Information Server | Computing |
| Mcafee Internet Security | Computing |
| Mounting Interface Standard | Computing |
| Maintenance Information Systems | Computing |
| Themis | Cryptocurrency |
| Mithril Share | Cryptocurrency |
| Mountain Ice Sheet | Earth Science |
| Master of Interdisciplinary Studies | Educational Degree |
| Management Information Science | Educational Degree |
| Metal Insulator Semiconductor | Electronics |
| Mission File (games) | File Type |
| Mindless Information Saturation | General |
| Made In Shlomi | General |
| Maintenance Information System | General |
| Mass In Service | General |
| Madison International Speedway | General |
| Mobile Inspection Station | General |
| Mechanical Investigation Section | General |
| Methanol Injection Supercharged | General |
| Motorhome Information Service | General |
| Mando India Steering | General |
| Modular Infotainment System | General |
| Mclaren Infotainment System | General |
| Micro Irrigation Set | General |
| Michigan International Speedway | General |
| Moore Integrated Solutions | General |
| Make It Simple | General |
| Master of | General |
| Malaria Indicators Survey | General |
| Malaria Indicator Survey | General |
| Memory Impairment Screen | General |
| Magnetic Image Sensor | General |
| Michetti Information Solutions | General |
| Men In Suits | Governmental |
| Municipality Information System | Governmental |
| Military Intelligece Staff | Governmental |
| Master Investigative Staff | Governmental |
| Management Initiatives Staff | Governmental |
| Medicaid Information System | Governmental |
| Meteorological Impact Statement | Governmental |
| Management Innovation Source | Governmental |
| Multimedia Internet Services | Internet |
| Mikrotec Internet Services | Internet |
| Manager of Information Systems | Jobs |
| Mathematics In The Sciences | Maths |
| Medical Information System | Medical |
| Medical Imaging System | Medical |
| Minimal Intervention Strategy | Medical |
| Melanoma In Situ | Medical |
| Minimally Invasive Surgery | Medical |
| Mullerian Inhibiting Substance | Medical |
| Market Intervention Scheme | Messaging |
| Mission Intelligence Segment (within Cars) | Military and Defence |
| Mission In Stealth | Military and Defence |
| Maritime Intelligence Summary | Military and Defence |
| Management Information System | Ministry of Communications and Information Technology |
| Mobile Internet Server | Networking |
| Managed Internet Service | Networking |
| Master Identification Sequence | Networking |
| Mexican Institute of Sound | News & Entertainment |
| Mirror Image Stimulation | Physics Related |
| MIsima Island, Papua New Guinea | Regional |
| Miscellaneous (Other) | Regional |
| Mississippi Central Railroad Corporation | Regional |
| Mississippi Central Railroad | Regional |
| Management Information System(s) | Software |
| Mission Information Subsystem | Space Science |
| Mississauga Sports Centre | Sports |
| Mobile Information Service | Telecommunication |