What does UM stand for?

What does UM mean?

UM	User Mode Computing » Assembly
UM	Ultimate Member Miscellaneous » Awards & Medals
UM	Up Mine Internet » Chat
UM	User Model Academic & Science » Chemistry
UM	USA Minor Outlying Islands Regional » Countries
UM	Unit of Measure Academic & Science » Electronics
UM	The Ultra Mirage Business » Firms
UM	Universal Mediterranea Business » Firms
UM	Universal Mgf Business » Firms
UM	University Of Morons Miscellaneous » Funnies
UM	Union Meeting Business » General
UM	Unvoiced Mutation Medical » Human Genome
UM	Under Medication Medical » Hospitals
UM	Unsolved Mysteries Community » Media
UM	User Manual Governmental » Military
UM	Unit Manager Governmental » Military
UM	Ubiquitous Museum Community » Museums
UM	Unified Messaging Computing » Networking
UM	Utah Medical Products, Inc. Business » NYSE Symbols
UM	Unsolicited Message Governmental » Police
UM	Universal Message Community » Religion
UM	United Methodist Community » Religion
UM	Unión Mallorquina International » Spanish
UM	Undefeated Masters Community » Sports
UM	Utter Madness Community » Sports

um(interj.): (used as an expression of doubt, hesitation, deliberation, etc.)