| sfp | BESA EGI Surface Points Data |
| sfp | System File Protection Database |
| sfr | Mail.dat Special Fees File |
| sfr | MODFLOW Streamflow-Routing Package |
| sfrm | Bruker SFRM Data |
| sfrom | SNES Nintendo Switch Online Rom Image |
| sfs | Browser3D Data |
| sfs | OpenOffice.org Frame Data |
| sft | Microsoft App-V Application |
| sft2 | Vegas Pro Custom Rendering Template |
| sftdde | Microsoft App-V Application Data |
| sfx | StatGraphics Centurion Data |
| sfxs | SFXR JSON Export Data |
| sg | SciGraphica Data |
| sg | Sega SG-1000 Image |
| sg2 | SEG-2 Data File |
| sg3 | ChessDB Game Data |
| sg3 | WinDS PRO SGS Data |
| sg4 | Scid Game Database |
| sga | SEG-A Seismic Data |
| sgb | SEG-B Seismic Data |
| sgb | Songsheet Generator Songbook |
| sgcap | Case CATalyst Caption Data |
| sgcdb | Case CATalyst Conflict Database |
| sgcpo | Case CATalyst Data |
| sgcul | Case CATalyst User Layout Data |
| sgcvn | Case CATalyst CaseViewNet Document |
| sgd | SEG-D Data |
| sgd | SpectraGryph Data |
| sgdct | Case CATalyst Dictionary Data |
| sgezt | Case CATalyst EZ Text Table |
| sgf | Smart Game Format Data |
| sgg | Statgraphics Plus StatGallery Data |
| sgglb | Case CATalyst Global Table |
| sgkbd | Case CATalyst Keyboard Map Data |
