What does um stand for?

Micron (DAVI)

Air Manila, Inc. (SAUS)

Air Zimbabwe - ICAO designator (AD)

Mauritius - NCIC country-territory code (NCIC)

Ouguiya - Monetary unit (ODBW)

Salt Lake County Library System, Midvale, UT - Library symbol - Library of Congress (LCLS)

Uckermark - German license plate city code

Ugaritic Manual - C. H. Gordon - A publication (BJA)

Ultramicroscope (SAUS)

Umbilical Mast - NASA (KSC)

Umot Me'uhadot - United Nations - Hebrew

Unable to Maintain (SAUS)

Unaccompanied Minor - Airline passenger

Unanimous - Telegraphy (PCTE)

Unclassified Mixture (SAUS)

Under-Mentioned - i.e., mentioned later in a document

Underwater Mechanic

Unified Messaging (SAUS)

Unified Model (SAUS)

Uniform Manifest (SARE)

Unimolecular (SAUS)

Uninsured Motorists - Insurance

Unio Mallorquina - Majorcan Union - Political party (PPW)

Unione Maniferro - Somalia

Union for Change Coalition (Guinea-Bissau) - Political party (PSAP)

Union Miniere (EFIS)

Union Movement Party - British

Unitas Malacologica - An association - Netherlands (EAIO)

United Medical (EFIS)

United Medical Corp. (SAUS)

United States Minor Outlying Islands - ANSI two-letter standard code (CNC)

Unit of Measure (MCD)

Unit of Measurement (SAUS)

Universal Machine Gun (MCD)

Universal Manufacturing (TIMI)

Universal Match (SAUS)

Universal Measuring Microscope

Universal Mill (SAUS)

Universal Monitor (MCD)

Universal Motor (SAUS)

University of Madras (SAUS)

University of Manitoba - Canada

University of Massachusetts - Amherst, MA

University of Mexico (SAUS)

University of Miami - Florida

University of Miami, Florida - USA - Marine science

University of Missouri Press

University of Moncton (SAUS)

University of Montana

University of Munich (SAUS)

Unmanned Manufacturing (SAUS)

Unmarried

Unpopular Magnetic Fields

Unpriced Material

Unscheduled Maintenance

Upper Magazine - Typography

Upper middle (CERES)

Upper Motor - Neurons - Medicine

Uracil Mustard - Antineoplastic drug (AAMN)

Urgent Message (SAUS)

Uromodulin

Useful Method

Use of Materials Bulletin - Department of Housing and Urban Development - A publication (GFGA)

User Manual (MCD)

Usual Margin (SAUS)

Utilization Management (WYGK)

Umbrian - Linguistics (IEL)

Uniform, Medium-Grained - Soil