BMS is a three letter acronym that may refer to:
- Be-Music Script, a computer file format
- Black Mesa (video game) (formerly known as Black Mesa: Source)
- Borane-methylsulfide
- Bristol Motor Speedway
- Broadmeadows railway station, Melbourne
- Burning Monkey Solitaire, a computer game
- Backwards music station, an unidentified radio signal.
- The Bernie Mac Show
- Blue Mountain State
- Corporations and organisations
- Baltimore Metro Subway
- Baptist Missionary Society
- Banco del Mutuo Soccorso
- The New York Stock Exchange abbreviation for Bemis Company Inc.
- Bharatiya Mazdoor Sangh, a trade union organisation in India
- BMS Scuderia Italia, an Italian racing team
- BMR Managed Services, a tax compliance solution provider
- British Mycological Society
- Bristol-Myers Squibb, a pharmaceutical and health products company
- Brotherhood of Medical Scholars, a medical fraternity in the Philippines
- Business Model Systems, a software development firm in Melbourne Australia
- Management systems
- Battery Management System
- Battlefield Management System
- Beach Management System
- Blacklist Mastering System
- Bridge Management System
- Building Management System
- Burner Management System
- Medical
- Biomedical Science, or Biomedical scientist
- Bone marrow suppression
- Burning Mouth Syndrome, also known as glossodynia or stomodynia oral dysaesthesia
- Bare-metal stent, a coronary stent
- Schools
- Briarcliff Middle School, a public middle school in Westchester, New York
- Bancroft Middle School (San Leandro)
- Bedford Modern School, a school in Bedford, UK
- Berkeley Middle School, a middle school in Williamsburg, Virginia.
- Berlin Mathematical School
- Bowditch Middle School, a public school in Foster City, California.
- Byrd Middle School, a middle school in Richmond, Virginia.
- Broadstone Middle School, a middle school in Broadstone, Poole, Dorset, England.
- Bedford Middle School, a middle school in Westport, Connecticut.
- Briarhill Middle School, a middle school in Highland Village, Texas
- Higher Education
- B.M.S College of Engineering, an Engineering College in Bangalore, India
- B.M.S Institute of Technology, an Engineering College in Bangalore, India
- Companies
BMS Transport