MS
- .ms
- Chennai Egmore railway station
- Egyptair
- M (disambiguation)
- M/S (disambiguation)
- MS (cigarette)
- MS (satellite)
- MS-13
- MSMS (disambiguation)
- Malay language
- Manuscript
- Mass spectrometry
- Master Sommelier
- Master System
- Master of Science
- Master of Surgery
- Master seaman
- Mastère spécialisé
- Mato Grosso do Sul
- Megasiemens
- Member of the Senedd
- Memoriae Sacrum
- Mesylate
- Metal Storm (webzine)
- Metre per second
- Metre second
- Microsoft
- Millisecond
- Missionaries of La Salette
- Mississippi
- Mitral valve stenosis
- Mjólkursamsalan
- Mobile station
- Montserrat
- Morgan Stanley
- Morphine sulfate
- Motor ship
- Motorola Solutions
- Ms.
- Ms. (magazine)
- Multan Sultans
- Multiple sclerosis
- S (disambiguation)
- SM (disambiguation)
- Solar mass
- Spin quantum number
- Surface-wave magnitude
- Young Socialists (Poland)