| SFO | Bitstream font file - fontware format 
| Others |
| SFO | Certified Administrator of School Finance and Operations
| Others |
| SFO | French Society of Ophthalmology
| Others |
| SFO | Safety and Flight Operations
| Others |
| SFO | San Francisco International Airport, San Francisco, California USA
| Others |
| SFO | San Francisco Oakland
| Others |
| SFO | San Francisco Office
| Others |
| SFO | San Francisco Opera
| Others |
| SFO | San Francisco Orthodontists
| Others |
| SFO | San Francisco Otters
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| SFO | Satellite Field Office
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| SFO | Scare Force One
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| SFO | Scholarship Funding Organizations
| Others |
| SFO | Scottish Fiddle Orchestra
| Others |
| SFO | Search For Obsidian
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| SFO | Sector Field Office
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| SFO | Secular Franciscan Order
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| SFO | Securities And Futures Ordinance
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| SFO | Senior Fire Officer
| Others |
| SFO | Senior First Officer
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| SFO | Serious Food Options
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| SFO | Serious Fraud Office
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| SFO | Servicing Finance Office
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| SFO | Shockwave Flash Object
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| SFO | Short Front Overhang
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| SFO | Side Facing Outwards
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| SFO | Simulated Flameout
| Others |
| SFO | Skole Fritids Ordning
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| SFO | Skyrim Flora Overhaul
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| SFO | So Far Overstretched
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| SFO | Social Security and National Insurance Trust
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| SFO | Solicitatio For Offers
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| SFO | Solicitation For Offers
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| SFO | Space Flight Operations
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| SFO | Special Factory Order
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| SFO | Special Forces Operational
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| SFO | stand for Find out
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| SFO | stand for Original
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| SFO | Star Fleet Operations
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| SFO | Star Flower Oil
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| SFO | Station Fire Officer
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| SFO | Steel Faith Overhaul
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| SFO | Steven Falls Over
| Others |
| SFO | Stocks Forex and Options
| Others |
| SFO | Stop Freaking Out
| Others |
| SFO | Strategy Focused Organization
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| SFO | Strawberry Flavored Objects
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| SFO | Street Fighter Online
| Others |
| SFO | Structure Field Offset
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| SFO | Struggle For Organization
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| SFO | Student Faculty Organization
| Others |
| SFO | Stwing Freshman Orientation
| Others |
| SFO | Subaru Forester Owners
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| SFO | SubFornical Organ
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| SFO | Sugitani Fukui and Ogura
| Others |
| SFO | Supervised Flight Operations
| Others |
| SFO | Swing Freshman Orientation
| Others |
| SFO | Synthetic Fuel Oil
| Others |