| MUM | Caledonia - Mumford 
| Others |
| MUM | Crisanthemum
| Others |
| MUM | Madison Urban MInistry
| Others |
| MUM | Magic Unity Might
| Others |
| MUM | Maharishi University of
| Others |
| MUM | Maharishi University of Management
| Others |
| MUM | Maintenance of Union Membership
| Others |
| MUM | Manage Understand and Mither
| Others |
| MUM | Manchester Underground Music
| Others |
| MUM | Manned Unmanned Military
| Others |
| MUM | Marginal Utility Of Money
| Others |
| MUM | Mass Memory Unit Manager
| Others |
| MUM | Maternity Unit Miracles
| Others |
| MUM | Mathematical Ulterior Motives
| Others |
| MUM | Maximal Unique Match
| Others |
| MUM | Maximum Unique Match
| Others |
| MUM | Meet under the McGrath
| Others |
| MUM | Meeting of Unemployed Minds
| Others |
| MUM | Members Useage Money
| Others |
| MUM | Merge Using Moments
| Others |
| MUM | Microsoft Update Manifest
| Others |
| MUM | MikroTik User Meeting
| Others |
| MUM | Minimising Unpleasant Messages
| Others |
| MUM | Minnesota United Minis
| Others |
| MUM | Mixed Up Mother
| Others |
| MUM | Mobile Agent Based Ubiquitous Multimedia Middleware
| Others |
| MUM | Mobile and Ubiquitous Multimedia
| Others |
| MUM | Modularization Unitization And Metrication
| Others |
| MUM | Money Under Management
| Others |
| MUM | Monroeville United Methodist
| Others |
| MUM | Muhammad Umer Malik
| Others |
| MUM | Multi Universe Moo
| Others |
| MUM | Multi User Maze
| Others |
| MUM | Multiattribute Utility Model
| Others |
| MUM | Mumias, Kenya
| Others |
| MuM | Murder under the Microscope
| Others |
| MUM | Muslim University of Morogoro
| Others |
| MUM | My Ultimate Mentor
| Others |
| MUM | Quiet
| Others |