Others
- Maison Internationale du Sport
- Major Investment Study, required for large transportation projects in the United States
- Masjid-I-Sulaiman, a city in the Khuzestan province in southwestern Iran
- Maximum independent set
- Men in skirts, a movement for making skirts acceptable for everyday wear by men in Western countries
- Mercalli intensity scale of earthquakes
- Metal Insulator Semiconductor, structure for electronic devices.
- Mexican Institute of Sound, a Mexican musical group from Mexico City
- Minimally invasive surgery
- Mississippi Central Railroad (disambiguation)
- Model Inference System (an Inductive Logic Programming system)
- Movement for the Independence of Sicily
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