MS

MS, ms, Ms, M.S., etc. may refer to:

Arts and entertainment

MS-13, criminal gang
Młodzi Socjaliści (Young Socialists), a former Polish socialist youth organization
Morgan Stanley, a US investment bank (NYSE stock symbol: MS)
Mjólkursamsalan, an Icelandic dairy company
Microsoft, an American multinational corporation and technology company
Motorola Solutions, an American communications equipment manufacturer

Master seaman, a non-commissioned member rank of the Canadian Navy
Mess Management Specialist, a former U.S. Navy occupational rating now covered by culinary specialist

Megasiemens (MS), and millisiemens (mS), multiples of the unit of electric conductance siemens
Metre per second (m/s), a unit of velocity (speed)
Metre second (m s), a unit of absement (sustained displacement of an object)
Millisecond (ms), and megasecond (Ms), multiples of the unit of time second

Surface-wave magnitude (M_s), a seismic scale
Solar mass (M_S), an alternate symbol to M_☉
Mass spectrometry, a method of determining the chemical composition or exact mass of molecules
Master of Science, a postgraduate university master's degree
Mesylate, a chemical salt
Spin quantum number, $m_{s}$

Ms., a title for women providing no indication of marital status
MS (cigarette), an Italian brand of cigarettes
MS (satellite), a series of four Soviet satellites launched in 1962
Malay language, of Southeast Asia (ISO 639-1 language code: ms)
Manuscript, abbreviation (ms.) for a written or typed document
Member of the Senedd (formerly Assembly Member), Welsh Parliament legislator
Memoriae Sacrum (Latin for "Sacred to the Memory"), an epitaph
Multan Sultans, a professional Twenty20 franchise cricket team in the Pakistan Super League