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UM or um may refer to:

Businesses and organizations[edit]

For universities, see § Universities.


In the United States[edit]

In other countries[edit]

Science and technology[edit]

  • .um, the Top Level Domain for United States Minor Outlying Islands
  • Um interface, the air interface for the GSM mobile telephone standard
  • Micrometre (μm), sometimes written as "um" in limited character sets
  • Unified Model, a global numerical weather prediction model
  • Utilization management, the evaluation of the appropriateness, medical need and efficiency of health care

Other uses[edit]

See also[edit]