| Acronym | Definition |
|---|
| MS | Microsoft |
| MS | Master of Science (degree) |
| MS | Mississippi (US postal abbreviation) |
| MS | Mail Stop |
| MS | Multiple Sclerosis |
| MS | Manuscript |
| MS | Motor Ship (nautical vessel designation; also see SS for steam ship) |
| Ms | Combination of Miss and Mrs. (title of address for women) |
| MS | Middle School |
| MS | Mail Server |
| MS | Medical Student |
| MS | Masters of Science (less common) |
| MS | Mobile Station |
| MS | Market Share |
| MS | Management System |
| MS | Management Services |
| MS | Member States (EU) |
| MS | Management Science |
| MS | Mobile Suit (Gundam World) |
| MS | Most Significant |
| MS | Medical Services |
| MS | Member State |
| MS | Memory Stick |
| MS | Mass Storage |
| MS | Media Server |
| MS | Mint State (highest quality of coin) |
| ms | measures (music score) |
| MS | Mean Square |
| MS | Master Schedule |
| MS | Memory System |
| MS | Military Science |
| MS | Morgan Stanley (investment bank) |
| MS | Message Store |
| MS | Monitoring System |
| MS | More Stuff (polite form) |
| MS | Maple Story (MMORPG) |
| MS | Maple Story (computer game) |
| MS | Master System (Sega) |
| MS | Message System |
| MS | Multiple Sclerosis Society of Canada |
| MS | Medical Surgical |
| MS | Market Survey |
| MS | Midnight Sun (band) |
| MS | Metabolic Syndrome |
| MS | Mode Select |
| MS | Marine Safety |
| MS | Milestone |
| MS | Mild Steel |
| MS | Mission Specialist |
| MS | Mass Spectroscopy |
| MS | Meets Standards (school grading system) |
| MS | Mass Spectrometry |
| MS | Modern Studies (school subject) |
| MS | Mato Grosso do Sul (Brazil) |
| MS | Mass Spectrometer |
| MS | Memory Store (calculator button) |
| MS | Mad Scientist |
| MS | Mediterranean Sea |
| MS | Metal Slug (game) |
| MS | Mobility Solutions (Lucent) |
| Ms | Mariners (Seattle baseball team) |
| MS | Morphine Sulfate |
| MS | Massa Carrara (postcode, Italy) |
| MS | Metric System |
| MS | Marks and Spencer (UK department store) |
| MS | Mail Store |
| MS | Maintenance Shop |
| MS | Minesweeper |
| MS | MySpace |
| ms | Millisecond |
| MS | Michael Schumacher (F1 driver) |
| MS | Merchant Shipping |
| MS | Martin Scorsese (film director) |
| MS | Mid-Side (stereo sound recording) |
| MS | Medium Speed |
| MS | Major System |
| MS | Marge Simpson |
| MS | Mobile Subscriber |
| MS | Maybe So |
| MS | Moderately Susceptible |
| MS | Machine Screw |
| MS | Mario Sunshine (video game) |
| MS | Market Surveillance |
| MS | Egyptair (IATA airline code) |
| MS | Multi-Spectral |
| MS | Market Segmentation |
| MS | Manual Switch |
| MS | Matrix Spike |
| MS | Mara Salvatrucha (gang) |
| MS | Magnetic Storage |
| MS | Missile System |
| MS | Musculo-Skeletal |
| MS | Mono Stereo |
| MS | Margin of Safety (structural engineering term) |
| MS | Mother Ship (game) |
| MS | Medical Service Corps |
| MS | Murashige and Skoog (basal medium) |
| MS | Manufacturing Specialist |
| MS | Mitral Stenosis (medical) |
| MS | Mission Simulator |
| Ms | Surface Wave Magnitude (formula for measuring earthquakes) |
| MS | Main Station |
| MS | Mobility Support |
| MS | Multidimensional Scaling |
| MS | Marking Scheme (examinations) |
| MS | Medium Shot (cinematography) |
| MS | Master Switch |
| MS | Matched Set (philately) |
| MS | Medical Superintendent |
| MS | Mike Shinoda (Linkin Park band member) |
| MS | Michael Shanks (actor) |
| MS | Multiplex Section |
| MS | Manufacturing Strategy |
| MS | Maggie Simpson |
| MS | Microwave System |
| MS | Master Sommelier |
| MS | Models and Simulations (Conference) |
| MS | Mission: Space (Epcot, Walt Disney World, Florida) |
| MS | Male Sterile |
| MS | Music/Speech (broadcasting) |
| MS | Message Switch |
| MS | Man System (CASI) |
| MS | Main Spring |
| MS | Master Shake (cartoon character) |
| MS | Measurement Signal |
| MS | Microprocessor System (AT&T) |
| MS | Main Steam (valve in nuclear submarine) |
| MS | Monitor Station |
| MS | Master Sword (Legend of Zelda Game) |
| MS | Million Samples (sampling rate) |
| MS | Marketing Society |
| MS | Mortal Strike (gaming, World of Warcraft) |
| MS | Motorschiff (German: motor vessel) |
| MS | Memoserv (IRC Memo Server) |
| MS | Master of Surgery |
| MS | Military Shipping |
| MS | Maintenance Standard |
| MS | Markov Switching |
| MS | Music Scholar (Eton College) |
| MS | Manganese Steel |
| MS | Munchausen's Syndrome |
| MS | Morneau Sobeco |
| MS | Metal Sonic (gaming character) |
| MS | Magical Sword (Legend of Zelda game) |
| MS | Medical Survey |
| MS | Mission Schedule |
| MS | Motor Spirit (petroleum) |
| MS | Microwave Sensor |
| MS | Mandatory Supervision (type of parole) |
| MS | Mirage Studios |
| MS | Master of Sports |
| MS | Missile Squadron |
| MS | Master Smith (bladesmithing) |
| Ms | Milksolids |
| MS | Master Seaman (Canadian Forces naval rank) |
| MS | Modified Silicone |
| MS | MirrorSoft (former game maker) |
| MS | Mild Severe (British rock climbing grade) |
| MS | Mammal Society |
| MS | Motorschip (Dutch) |
| MS | Monitoring Subsystem |
| MS | Mint Sheet (of stamps) |
| MS | Mobilization Station |
| MS | Michele Soavi (film director) |
| MS | Main Satellite |
| MS | Motor Signal |
| MS | Microwave Switch (electromechanics) |
| MS | Mirrored System |
| MS | Mess Management Specialist (US Navy rating) |
| MS | Medium Steel |
| MS | Mechanics Service |
| MS | Model Station |
| MS | Maple Sea (Maple Story gaming) |
| MS | Massa, Toscana (Italian province) |
| MS | Mannose-Sensitive |
| MS | Mouvement Socialiste (French: Socialist Movement) |
| MS | Magestorm (game) |
| MS | Mega Sample (Electronic Data Acquisition Systems) |
| MS | Motor Saw |
| MS | Manual Sweep (Agilent) |
| MS | Millenial Star (LDS Church) |
| MS | Maternal Sire |
| MS | Michigan Shore Railroad |
| MS | Michigan Southern Railway |
| MS | Maintenance Shelter |
| MS | Military Score (gaming) |
| MS | McLean Symphony (McLean, VA) |
| MS | Missile Station (linear measurement reference to key points on a missile) |
| MS | Minimal Subtraction |
| MS | Meta Signaling |
| MS | Marine Science Technician |
| MS | Mission Scanner |
| MS | Mantissa Sign |
| MS | Mega Second (1,000,000 seconds) |
| MS | Microwave Subsystem |
| MS | Merge Specification |
| MS | Mildly Susceptible |
| MS | Module Signaling |
| MS | Monopolio Statale |
| MS | Multiple Elastic Scattering |
| MS | Marus Seru (Everquest) |
| MS | Mass Shareware |
| MS | Meteor Scattering (ham radio) |
| MS | Monitored Seconds |
| MS | Milieuschadelijkheid (Dutch: environmental harmfulness) |
| MS | Missionaries of Our Lady of Lasalette (religious order) |
| MS | Multilateral Staff |
| MS | Mirror Subassembly |
| MS | Manta Sonica (band) |
| MS | Monitor Statistica |
| MS | Minimum Stockage |
| MS | Military Standard/Service/Specification |
| MS | Modifi Sci (Indie rap group) |
| MS | Midnight Spin (band) |
| MS | Medical Solutions (various organizations) |
| MS | MaleSurvisor (formerly National Organization on Male Sexual Victimization; US) |
| MS | Mystery Shopping |