MSI

MSI may refer to:

Organizations

 * Macedonian Scientific Institute, an institution in Sofia, Bulgaria
 * Marketing Science Institute, a nonprofit learning institution in Cambridge, Massachusetts, US
 * Media Sport Investment, the international fund of investors that ran Sport Club Corinthians Paulista
 * Millennium Science Initiative, an international program bringing technology to developing nations
 * Ministry of Science and Innovation (New Zealand)
 * Minority-serving institution, in US higher education
 * MSI Reproductive Choices, an international non-governmental organisation providing contraception and safe abortion services, with a global HQ in London, UK
 * Museum of Science and Industry (Chicago)
 * Science and Industry Museum, in Manchester, England
 * University of Minnesota Supercomputing Institute
 * Italian Social Movement (Movimento Sociale Italiano), a defunct post-fascist party

Companies

 * Micro-Star International, a Taiwanese information technology company
 * Midwest Scientific Instruments, a defunct American computer company
 * Morgan Stanley (Broker ID), an American financial services company
 * Motorola Solutions (NYSE: MSI), an American data communications and telecommunications equipment provider
 * Movie Star (company) (AMEX: MSI), an American clothing manufacturer

Science and technology

 * MSI Barcode, a continuous numeric barcode symbology
 * Microsatellite instability, an abnormality of DNA
 * Mass spectrometry imaging, a technique used in mass spectrometry
 * Mass sociogenic illness, the rapid spread of physical symptoms of illness among the members of a group with no physical or infectious cause
 * Magnetic source imaging, magnetoencephalography combined with magnetic resonance imaging
 * Multispectral imaging, the capture of multiple, specific wavelengths in the electromagnetic spectrum
 * Musculoskeletal injury, damage of muscular or skeletal systems which is usually due to a strenuous activity

Computing

 * .MSI, the filename extension of Windows Installer packages
 * Medium Scale Integration, a generation of integrated circuit chips which contain hundreds of transistors
 * Message Signaled Interrupts, a PCI 2.2 interrupt-mechanism
 * MSI protocol, a basic cache-coherence protocol used in multiprocessor systems

Other uses

 * Maison du Sport International, an office complex in Lausanne, Switzerland
 * Maritime safety information
 * Medical Service Insurance, the Government of Nova Scotia's health insurance
 * Mid-Season Invitational, an annual League of Legends tournament
 * Mindless Self Indulgence, an American band
 * Multistakeholder initiative, a governance structure
 * A US Navy hull classification symbol: Inshore minesweeper (MSI)