82 File Extensions starting with S
| .SAR | Saracen Paint Image |
| .SC2 | Msx 2 Screen Image |
| .SCI | SciFax Image |
| .SCI | ColoRIX Image |
| .SCR | Sun Rasterfile |
| .SCR | ZX Spectrum Standard Screen Image |
| .SCT | SciTex Continuous Tone Image |
| .SCX | ColoRIX Image |
| .SD0 | Dali Raw Image |
| .SD1 | Dali Raw Image |
| .SD2 | Dali Raw Image |
| .SDA | StarDraw Drawing |
| .SDC | StarCalc Spreadsheet |
| .SDD | StarDraw Drawing |
| .SDD | StarImpress Presentation |
| .SDG | Star Office Gallery Image |
| .SDT | SmartDraw 6 Template |
| .SDW | StarWriter Document |
| .SEQ | Stad Image |
| .SFV | SFV Checksum File |
| .SFW | Seattle Film Works Image |
| .SGF | StarWriter Graphics Format Image |
| .SGI | Silicon Graphics RGB Image |
| .SGL | StarWriter Master Document |
| .SGV | StarDraw Image |
| .SH | Unix Shell Script |
| .SHAPE | Dia Shape File |
| .SHTML | Server Side Includes HTML File |
| .SI | Softimage |
| .SIM | Aurora Image |
| .SIR | BYU SIR Image |
| .SIR | Solitaire Image Recorder Image |
| .SJ1 | Sega SJ-1 DIGIO Image |
| .SKF | Autodesk SKETCH thumbnail Image |
| .SKN | Skantek Image |
| .SKP | Autodesk SketchUp component Image |
| .SLK | SYLK Spreadsheet |
| .SMF | StarMath Data |
| .SMP | Xionics SMP Image |
| .SNA | ZX Spectrum Snapshot Image |
| .SND | Sun / NeXT Audio File |
| .SPC | Spectrum 512 (Compressed) Image |
| .SPS | Spectrum 512 (Smooshed) Image |
| .SPU | Spectrum 512 Image |
| .SPX | Ogg Speex Audio File |
| .SQL | SQL Database Query |
| .SR | Sun Rasterfile |
| .SR2 | Sony Raw Image File |
| .SRF | Sony Raw Image File |
| .SRT | DVD Subtitles File |
| .SSI | SriSun Image |
| .SSP | Axialis Screensaver Image |
| .ST4 | SBIG CCD camera ST-X Image |
| .ST4 | SBIG CCD camera ST-4 Image |
| .ST5 | SBIG CCD camera ST-X Image |
| .ST6 | SBIG CCD camera ST-X Image |
| .ST7 | SBIG CCD camera ST-X Image |
| .ST8 | SBIG CCD camera ST-X Image |
| .STC | Apache OpenOffice 1.0 Spreadsheet Template |
| .STI | Apache OpenOffice 1.0 Presentation Template |
| .STM | Server Side Includes HTML File |
| .STM | PhotoStudio Stamp Image |
| .STW | Apache OpenOffice 1.0 Text Document Template |
| .STW | Apache OpenOffice 1.0 HTML Template |
| .STW | Neopaint Stamp Image |
| .STX | SBIG CCD camera ST-X Image |
| .SUL | Gfa Raytrace Image |
| .SUN | Sun Rasterfile |
| .SUNIFF | Sun TAAC Image |
| .SVG | Scalable Vector Graphics Image |
| .SVGZ | GZip Compressed Scalable Vector Graphics Image |
| .SVM | StarView MetaFile |
| .SWF | Adobe Flash Movie |
| .SXC | Apache OpenOffice 1.0 Spreadsheet |
| .SXD | Microsoft Apache OpenOffice 1.0 Drawing |
| .SXG | Apache OpenOffice 1.0 Master Document |
| .SXI | Apache OpenOffice 1.0 Presentation |
| .SXM | Apache OpenOffice 1.0 Formula |
| .SXW | Apache OpenOffice 1.0 Text Document |
| .SYN | Synthetic Universe Image |
| .SYNU | Synthetic Universe Image |