| MFO | Made For Outlet 
| Others |
| MFO | Magic Finding Olympics
| Others |
| MFO | Major Function Overlay
| Others |
| MFO | Mandatory Family Outing
| Others |
| MFO | Manguna, Papua New Guinea
| Others |
| MFO | Marine Fuel Oil
| Others |
| MFO | Maschinen Fabrik Oerlikon
| Others |
| MFO | Mass Flow Of
| Others |
| MFO | Massachusetts Film Office
| Others |
| MFO | Mathematisches Forschungsinstitut Ober
| Others |
| MFO | Mathematisches Forschungsinstitut Oberwolfach
| Others |
| MFO | Mattress Factory Outlet
| Others |
| MFO | Mazhar Fuat Ozkan
| Others |
| MFO | McMahon Fans Online
| Others |
| MFO | MedFlight of Ohio
| Others |
| MFO | Median Filter Order
| Others |
| MFO | Medium Farm Operations
| Others |
| MFO | Men For Others
| Others |
| MFO | Men's Foil Open (Fencing)
| Others |
| MFO | Mephisto Frequency Oscillator
| Others |
| MFO | Metropolitan Festival Orchestra
| Others |
| MFO | Miami Field Office
| Others |
| MFO | Mixed Function Oxidase
| Others |
| MFO | Mods Face Off
| Others |
| MFO | Monster Fighters Outpost
| Others |
| MFO | Monthly Freedom-Observer
| Others |
| MFO | Moth Flame Optimization
| Others |
| MFO | Mr. Fixit Online
| Others |
| MFO | Multi Family Office
| Others |
| MFO | Multi-national Force Observer
| Others |
| MFO | Multicultural Families Organisation
| Others |
| MFO | Multinational Force and Observers
| Others |
| MFO | Multinational Force andObservers
| Others |
| MFO | Multinational Force Observers
| Others |
| MFO | Multinational Force of Observers
| Others |
| MFO | Multinational Forces and Observers
| Others |
| MFO | Music Fundamentals Online
| Others |