UMO

AcronymDefinition
UMOUnknown Mortal Orchestra (band)
UMOUniversity of Mount Olive (North Carolina)
UMOUsed Motor Oil
UMOUniversity of Missouri
UMOUniversity of Maine at Orono (obsolete; now University of Maine, UM)
UMOUnit Movement Officer
UMOUpdate.mozilla.org (website)
UMOUniversal Message Object (MuleSource, Inc.)
UMOUnit Movement Office
UMOUndeliverable Mail Office (Canada Post)
UMOUnmodified Molecular Orbital
UMOUnconventional Military Operations
UMOUseless Management Overhead
UMOUnidentified Micro-particle Object (anime)