| sgcpo | Case CATalyst Data |
| sgd | SEG-D Data File |
| sgd | SpectraGryph Data |
| sgdct | Case CATalyst Dictionary Data |
| sgf | Smart Game Format Data |
| sgm | VisualBoy Advance Saved Game |
| sgm | XMetaL SGML Data |
| sgmac | Case CATalyst License Data |
| sgn | Sierra Print Artist Sign Data |
| sgn | Slax Livecd Signature File |
| sgngl | Case CATalyst Text Data |
| sgo | SansGUI Object Library |
| sgp | SansGUI Project Model |
| sgp | Sitestepper Data |
| sgr | S-PLUS Saved Graph Sheet |
| sgr | SGR Genome Data |
| sgs | Sansgui Schema Definition File |
| sgs | WinDS PRO SGS Data |
| sgstn | Case CATalyst Steno Note Data |
| sgt | SPSS Chart Template |
| sgx | Lahey Fortran Help Index Data |
| sgy | SEG-Y Geophysical Data |
| sh1 | CIRCAD Schematic Document |
| sh2 | CIRCAD Schematic Document |
| sh3 | CIRCAD Schematic Document |
| sh3f | Sweet Home 3D Model Library |
| sh3l | Sweet Home 3D Language Data |
| sh3t | Sweet Home 3D Texture Data |
| sh4 | CIRCAD Schematic Document |
| sh4 | HelpMaker Help Authoring Tool Data |
| sh5 | CIRCAD Schematic Document |
| sh5 | HelpMaker Help Authoring Tool Data |
| sh6 | CIRCAD Schematic Document |
| sh6 | HelpMaker Help Authoring Tool Data |
| sh7 | CIRCAD Schematic Document |
