| MFN | Main Frogans Network 
| Others |
| MFN | Many Foreign Nationals
| Others |
| MFN | Masculine Feminine Neuter
| Others |
| MFN | Master File Notification
| Others |
| MFN | Master File Number
| Others |
| MFN | Medford Family
| Others |
| MFN | Medford Family Network
| Others |
| MFN | Medial Frontal Negativity
| Others |
| MFN | Medical Fitness Network
| Others |
| MFN | Merchant Fulfilled Network
| Others |
| MFN | Merchant Fulfillment Network
| Others |
| MFN | Metabolic Fecal Nitrogen
| Others |
| MFN | Metal Finishing News
| Others |
| MFN | Metromedia Fiber Network
| Others |
| MFN | Metropolitan Fiber Network
| Others |
| MFN | Miles From Nowhere
| Others |
| MFN | Milford Sound, New Zealand
| Others |
| MFN | Ministerial Formation Network
| Others |
| MFN | Money For Nukes
| Others |
| MFN | Moronic Filename Normalizer
| Others |
| MFN | Most Favorable Nation
| Others |
| MFN | Most Favored Nation
| Others |
| MFN | Most Favored Nation trade status (now called Normal Trade Relations)
| Others |
| MFN | Most Favored Nations
| Others |
| MFN | Most Favorite Nation
| Others |
| MFN | Most Favoured Nation
| Others |
| MFN | Most Favoured Nations
| Others |
| MFN | Mostly Free Needlework
| Others |
| MFN | Motor Filatelisten Nederland
| Others |
| MFN | Motorola Feedback Network
| Others |
| MFN | Multi Facet Network
| Others |
| MFN | Multi Flame Nozzle
| Others |
| MFN | Multi Frequency Network
| Others |
| MFN | Multi Functional Normb
| Others |
| MFN | Multi-Forums Network
| Others |
| MFN | Multilateral Funding Network
| Others |
| MFN | Multiple Frequency Network
| Others |