| UMI | Italian Mathematical Union 
| Others |
| UMI | Quincemil, Peru
| Others |
| UMI | Ultra Morphic Illumination
| Others |
| UMI | Unidisc Music, Inc.
| Others |
| UMI | Unified Media Interface
| Others |
| UMI | Union Minus Intersection
| Others |
| UMI | Union Mundial pro Interlingua
| Others |
| UMI | Unione Matematica Italiana
| Others |
| UMI | Unique Message Identifier
| Others |
| UMI | Unit Movement Identifier
| Others |
| UMI | United Marine International
| Others |
| UMI | United Materials Inc
| Others |
| UMI | United Mechanical Inc
| Others |
| UMI | United Motion Ideas
| Others |
| UMI | United Musical Instruments
| Others |
| UMI | Universal Media Interface
| Others |
| UMI | Universal Mediation Interface
| Others |
| UMI | Universal Minerals, Inc.
| Others |
| UMI | Universal Motors Israel
| Others |
| UMI | University Microfilms International
| Others |
| UMI | University Microfilms, Inc.
| Others |
| UMI | University Microfilms, Incorporated
| Others |
| UMI | Unlimited Musical Influences
| Others |
| UMI | Unofficial Meeting Instigator
| Others |
| UMI | Unwanted Muslim Invaders
| Others |
| UMI | Upper Middle Income
| Others |
| UMI | Urban Ministries Inc
| Others |
| UMI | Urban Modeling Interface
| Others |
| UMI | Urine Monitoring Investigation
| Others |
| UMI | Ursa Major International, LTD.
| Others |