Um

UM or um may refer to:

Universities

• U of M (disambiguation) or UM, abbreviation for various universities

Businesses

• Air Zimbabwe (IATA code UM)
• United Motors Company, a former name of American automotive parts supplier ACDelco
• Universal McCann, a global advertising and media agency
• Universal Medicine, an Australian cult selling unproven methods of healing

Science and technology

• .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
• Ultrarapid metabolizer, a term used in pharmacogenomics to refer to individuals with substantially increased metabolic activity
• User manual, a document or manual intended to give assistance to people using a particular system
• Utilization management, the evaluation of the appropriateness, medical need and efficiency of health care

Other uses

• Um (Korean surname)
• "Um", an exclamation or filler in spoken conversation
• Um (cuneiform), a sign in cuneiform writing
• Umphrey's McGee, a jam band
• Unofficial magistrate, as a postnominal
• Unified Messaging, in marketing
• United States Minor Outlying Islands (ISO 3166 code UM)
• Union for the Mediterranean, an intergovernmental organization of 43 countries from Europe and the Mediterranean Basin
• Uttaradi Math, a Hindu matha (monastery)
• United Methodist, a religious organization