| .s | Source Code Format |
| .s#+a | RagTime 2 |
| .s00 | Split Multi-volume ZipSplitter Compressed File Archive (part 1) |
| .s01 | Corel WordPerfect Distribution Format |
| .s02 | Corel WordPerfect Distribution Format |
| .s03 | Corel WordPerfect Distribution |
| .s04 | Split Multi-volume ZipSplitter Compressed File Archive (part 5) |
| .s05 | Split Multi-volume ZipSplitter Compressed File Archive (part 6) |
| .s06 | Split Multi-volume ZipSplitter Compressed File Archive (part 7) |
| .s07 | Split Multi-volume ZipSplitter Compressed File Archive (part 8) |
| .s08 | Split Multi-volume ZipSplitter Compressed File Archive (part 9) |
| .s09 | Split Multi-volume ZipSplitter Compressed File Archive (part 10) |
| .s10 | Brasfoot Saved Game Format |
| .s19 | Motorola EEPROM Programming Format |
| .s1j | Sealed |
| .s1p | Touchstone 1 S-parameter Data |
| .s2 | Stranded II Map |
| .s28 | Genesis Or Sega32X ROM Image |
| .s2a | SEAL Program Format |
| .s2d | Agilent EEsof EDA S-parameter Data |
| .s2e | SWF To EXE Converter Project Format |
| .s2k | Subtitle |
| .s2m | Stronghold 2 Map Format |
| .s2ma | Starcraft 2 Map |
| .s2mh | StarCraft 2 Map Header Format |
| .s2mi | Starcraft 2 Cache |
| .s2ml | StarCraft 2 Map Localization Format |
| .s2mv | Starcraft 2 Map Preview Image |
| .s2p | Touchstone 4 S-parameters Data |
| .s2qh | StarCraft 2 Localisation Header Format |
| .s2ql | StarCraft 2 Unit Localisation Format |
| .s2s | Spike2 Script |
| .s2t | Scia2Tekla Plugin |
| .s2z | S2Games Savage Game Format |
| .s31 | SmartWhois |
| .s3d | Philips 3D Solutions 3D Displays That Show 3D Content |
| .s3db | MySQL Database |
| .s3i | ScreamTracker V3 Instrument Format |
| .s3m | Scream Tracker V3 Module |
| .s3p | Touchstone 9 S-parameters Data |
| .s3t | Scorched 3D Tankpack |
| .s3z | Amiga And Pc Tracker Module Format |
| .s43 | IAR Assembly Source |
| .s4e | Airplay SDK Header |
| .s4m | SWAT 4 Map Format |
| .s4p | Touchstone 16 S-parameters Data |
| .s57 | International Hydrographic Organization Vector Image |
| .s5x | Heritage Of Kings: The Settlers Map Format |
| .s6bn | Word 6 For Mac Template |
| .s7 | Sibelius Music Notation |
| .s7p | SubSeven Trojan |
| .s7z | 7-zip Compressed Format |
| .s85 | SABRE StaffPlan Chart Format |
| .s8bn | Word 98 For Mac Template |
| .s8l | SAP GUI |
| .s98 | NEC PC-98 Audio |
| .sa1 | Nintendo Game Boy Emulator Save Format |
| .sa2 | Suprise! Adlib Tracker Music Module |
| .sa4 | Delorme Street Atlas USA |
| .sa5 | SecretAgent Archive |
| .sa7 | Street Atlas Map Document |
| .sa8 | Street Atlas 8 Map Document |
| .sa9 | Hue And Cry Adobe Photoshop Plug-in Format |
| .saa | SecretAgent Encrypted Archive |
| .saas | Sass Indented Syntax |
| .sab | 3D ACIS Binary Format |
| .sab2 | NVision 3D Scanner |
| .sabl | Call Ot Duty: Black Ops II Audio Library |
| .sabs | Call Ot Duty: Black Ops II Sounds |
| .sacred2save | Sacred 2 Save Game |
| .sad | Lucas Arts Sound Format |
| .saf | Street Atlas USA Map Format |
| .safariextz | Apple Safari Extension Format |
| .safe | WM Keeper CLASSIC Purse File Backup |
| .safetext | Encrypted Text |
| .sah | Seti@home Data |
| .sai | PaintTool SAI Image |
| .saj | Sage 50 Folder |
| .sak | Postal Game Archive |
| .sal | SQL Application Language |
| .sam | Ami Pro Document Format |
| .sam07 | SAM 2007 Package Format |
| .samba3 | Gnome Desktop |
| .sami | Synchronized Accessible Media Interchange Format Format |
| .samrc | SAM Default Parameters |
| .san | LucasArts Smush Animation Format |
| .sap | Atari XL/XE Audio Format |
| .sapssd | SAP Related |
| .sar | SAR Compressed Format Archive (SAPCAR Archive) |
| .sas | SAS Source Code Format |
| .sas7bdat | SAS Database |
| .sas7bndx | SAS Index |
| .sass | Syntactically Awesome Stylesheets Indented Syntax |
| .sat | 3D ACIS Model Format |
| .sav | Saved Game Format |
| .sav2 | SuperPower Save Game |
| .save | Nano Temporary Saved Format |
| .saveddeck | Nokia Saved Web Page Format |
| .savedsearch | Spotlight Saved Search |
| .savedstate | Virtual Router Saved State Format |
| .saver | Mac OS X Screen Saver |
| .save_multiplayer | Total War Multiplayer Save |
| .savf | AS400Manager JAVA |
| .saw | Living Scenes Jigsaw Puzzles |
| .sax | Sedona Framework XML Application |
| .say | Saya Matrix Accounting Database |
| .saz | Fiddler Session Archive ZIP |
| .sb | Scratch Finished Product Format |
| .sb1 | MemoryMixer Album |
| .sb7 | SetupBuilder Project |
| .sba | SpeedBalance Accounting Data |
| .sbb | Microsoft Office Accounting Company Backup Format |
| .sbc | Microsoft Office Accounting Company Shortcut Format |
| .sbd | Mozilla Mail Subdirectory Format |
| .sbe | Spybot Excludes |
| .sbf | Google Android Mobile Phone Backup Format |
| .sbg | SBaGen Binaural Beat Format |
| .sbi | Creative Labs SoundBlaster Instrument |
| .sbk | Creative Labs EMU SoundFont V1 Bank Format |
| .sbl | Arquitienda Graphic Symbol Library |
| .sbml | Systems Biology Markup Language Source |
| .sbn | ArcView Spatial Index For Read-write Shapefiles |
| .sbo | SAP Business One SDK Add-on Related |
| .sbp | OpenSBP CNC Program Format |
| .sbproj | OpenGL Shader Builder Project |
| .sbq | Superbase Query Definition Format |
| .sbr | Microsoft Visual Studio Visual C++ Source Browser Intermediate Format |
| .sbrz | Sky Ebook Reader E-book |
| .sbs | Spybot Search And Destroy Includes Format |
| .sbsc | Adobe Soundbooth Score Document |
| .sbst | Adobe Soundbooth Score Template |
| .sbstore | Mozilla Firefox |
| .sbt | Suberbase Record Notes Format |
| .sbu | Samsung Kies Backup |
| .sbv | Superbase Form Definition Format |
| .sbw | US Treasury Savings Bonds Wizard Format |
| .sbx | Adobe Illustrator Tsume Format |
| .sbz | ShowBiz Project |
| .sc | Framework II Display Driver |
| .sc1 | SimCity |
| .sc2 | Sample Cell II PC/Mac Instrument Format |
| .sc2000 | Sim City 2000 Tileset |
| .sc2archive | StarCraft 2 Archive Format |
| .sc2assets | StarCraft 2 Game Assets Format |
| .sc2bank | StarCraft 2 Bank Format |
| .sc2data | Starcraft 2 A.I. Game Format |
| .sc2locale | StarCraft 2 Localization Format |
| .sc2ma | StarCraft 2 Map Data Format |
| .sc2map | StarCraft 2 Map Format |
| .sc2mod | StarCraft 2 Game Mod Format |
| .sc2replay | Starcraft 2 Game Replay Format |
| .sc2save | StarCraft 2 Game Saved Format |
| .sc2scene | StarCraft 2 Cut Scene Format |
| .sc3 | Renamed DBASE III Screen Mask Format |
| .sc4 | Game File Format |
| .sc45 | SuperCard Project Format |
| .sc4desc | SimCity 4 Description Format |
| .sc4lot | SimCity 4 Lot Format |
| .sc4model | SimCity 4 Model Format |
| .sc5 | Chris Sawyer Locomotion Scenario |
| .sc6 | RollerCoaster Tycoon 2 Scenario Format |
| .sc? | ColoRix Bitmap Image |
| .sca | Scala InfoChannel Script Format |
| .scacfg | SuperCard Application Configuration Format |
| .scad | OpenSCAD CAD Model Format |
| .scala | Scala Source |
| .scap | EFI Firmware Format |
| .scar | SCAR Script Format |
| .scat | RealView Scatter-loading |
| .scb | Command & Conquer World Builder Script Format |
| .scc | Visual SourceSafe Control Format |
| .scd | Scribus Document Format |
| .scdoc | SpaceClaim 3D CAD |
| .sce | SoftCuisine Data Exchange |
| .scea | Marathon 2 Aleph One Map Format |
| .scene | VCollab Scene Format |
| .scexcludb | Spring Cleaning Exclusions Format |
| .scf | Windows Explorer Shell Command Format |
| .scg | MyPM SCG Definition Format |
| .sch | CAD Schematics Format |
| .schdoc | Altium Designer Schematic Capture Binary |
| .schemas | GConf Schema Definition Format |
| .schematic | MCEdit Schematic Format |
| .scheme | Sothink Logo Maker Color Scheme |
| .sci | Virtumonde / Vundo Trojan Infected Format |
| .scl | Scala Scale |
| .scm | StarCraft Campaign Map Format |
| .scmt | GXS Application Integrator XML Constraint |
| .scn | Game Scenario Format |
| .sco | Game Score Format |
| .sconscript | SCons SConscript Configuration |
| .sconstruct | SCons Makefile |
| .score | Learning Score |
| .scp | ColoRix Bitmap Image |
| .scpcfg | SuperCard Project Configuration Format |
| .scprt | Surfcam 3D Format |
| .scpt | AppleScript Script Format |
| .scptd | AppleScript Script Bundle |
| .scq | SAS Sequential Access |
| .scr | Microsoft Windows Screensaver Format |
| .scrabblehasbrosavedgame | Hasbro Scrabble Save Game |
| .scratch | Scratch Finished Product Format |
| .screem | SCREEM |
| .screenflow | ScreenFlow Document |
| .screstorelog | Spring Cleaning Restore Log Format |
| .scresults | Spring Cleaning Results Format |
| .script | Generic Script Format |
| .script editor | Apple Mac OS X AppleScript Script |
| .scriptsuite | AppleScript Script Suite Format |
| .scriptterminology | AppleScript Script Terminology Format |
| .scriv | Literature & Latte Scrivener Document Format |
| .scrivx | Literature & Latte Scrivener Document Format |
| .scro | Amira Script Object |
| .scs | SimCity Societies Saved Game Format |
| .scs11 | Show Cue System Cue Format |
| .scspack | SimCity Societies Transfer Package |
| .scss | Syntactically Awesome Stylesheets Syntax |
| .sct | Microsoft Windows Script Component Format |
| .scu | ColoRix Bitmap Image |
| .scut2 | Sure Cuts A Lot |
| .scv | ScanVec CASmate Sign Format |
| .scvinfo | Windows Communication Foundation WCF Metadata |
| .scw | Movie Magic Screenwriter Document Format |
| .scx | ColoRix Bitmap Image |
| .scy | ReaGeniX Security |
| .scz | Wingz Script Format |
| .sd | Audio Format |
| .sd0 | Dali Raw Image |
| .sd1 | Dali Raw Image |
| .sd2 | Sound Designer 2 Format |
| .sd2f | Sound Designer 2 Format |
| .sd3 | Hy-Tek Meet Manager Database Related |
| .sd4 | Smart Diary Suite Database |
| .sd7 | Spring RTS Engine Data Format |
| .sda | StarOffice Drawing Format |
| .sdat | Nintendo DS Sound Data Format |
| .sdb | OpenOffice Base Database Format |
| .sdbn | Microsoft Word 4/5 For Mac Template |
| .sdbz | Symantec Support Tool Information |
| .sdc | OpenOffice.org Spreadsheet Format |
| .sdd | OpenOffice.org Impress Presentation Format |
| .sde | Drumbeat Exported Data |
| .sdef | AppleScript Dictionary Scripting Definition |
| .sdexp | Creo Elements/Direct Model |
| .sdf | SQL Server Compact Edition Database Format |
| .sdfa | Exocad 3D |
| .sdg | StarOffice Gallery Image Format |
| .sdi | System Deployment Image Format |
| .sdif | Sound Description Interchange Format |
| .sdii | Sound Designer 2 Audio Format |
| .sdinstall | Speckie Dictionary Format |
| .sdir | Apple Logic Space Designer Impulse Response |
| .SDIRproj | Apple Impulse Response Utility Project |
| .sdk | Roland S-550/S-50/W-30 Disk Image |
| .sdkmesh | Microsoft DirectX Vertex Mesh |
| .sdl | Corel Paradox Script Format |
| .sdlprofile | TRADOS Exported User Settings |
| .sdltm | SDL Trados Studio |
| .sdlxliff | SDL Trados Studio Format |
| .sdm | StarOffice Mail Format |
| .sdmdocument | Microsoft SDM Document |
| .sdn | Smart Diary Suite Ingredients Format |
| .sdnf | Steel Detailing Neutral Format |
| .sdo | Signere.no Signed Document |
| .sdoc | Microsoft Word Sealed Document Format |
| .sdp | OpenOffice.org Presentation Format |
| .sdpc | Cocreate SolidDesigner Data |
| .sdpx | Kodak Cineon Image Format |
| .sdq | SAS Data Format |
| .sdr | SmartDraw Drawing Format |
| .sdr2 | H.264 MICRO DVR Camera Movie |
| .sds | OpenOffice.org Chart Format |
| .sdsk | SafeHouse Private Storage Volume Format |
| .sdt | SmartDraw Template Format |
| .sdv | Pinnacle Studio DV Video Editing Project |
| .sdw | OpenOffice.org Text Document Format |
| .sdx | Sample Sound Format |
| .sdy | StarMoney |
| .sdz | Spring RTS Engine Data Format |
| .se | SEwin Project |
| .se1 | CT Summation IBlaze Database |
| .sea | StuffIt Expander Archive Format |
| .seam | Seam Framework Java Servlet Format |
| .search-ms | Microsoft Windows Index Search Data Format |
| .searchconnector-ms | Microsoft Windows Search Connector Description Format |
| .searchindexcache | Mac OS X Cache |
| .sec | Pretty Good Privacy Secret Key Ring Format |
| .secstore | Adobe Secstore |
| .secure | Septium Secured Document |
| .securedownload | Safari Download |
| .security | Javasoft Jre 1.3 Lib Security |
| .securitysettings | Alpha Five Security Settings |
| .sed | Self Extracting Directive Format |
| .sedprj | Ashampoo Slideshow Studio Project Format |
| .see | LISCAD Plus |
| .seed | Linux Preseed Format |
| .seek | Word List Expert Seek List |
| .seestyle | Coda For Mac Style Sheet Format |
| .sef | Steganos Encrypted Format |
| .seg | Eragon Audio Format |
| .seg1 | StuffIt Segment |
| .seg2 | Stuffit Mac File Type |
| .seg3 | StuffIt Segment |
| .segn | StuffIt Segment |
| .SEGY | SEG-Y Geophysical Data |
| .sel | Corel PaintShop Photo Pro Selection Format |
| .sem | Alpha Five Set Objects |
| .seman | Xtext Semantics |
| .sen | Scifer Archiver Internal Archive Format |
| .seo | SEO Note Format |
| .sep | ChemSep Separation Case Format |
| .seplugin | Apple Mac OS X AppleScript Editor Plugin Format |
| .seq | Power Tracks Pro Music Sequencer Format |
| .sequ | Adobe Acrobat Sequence Format |
| .sequencediagram | Microsoft Visual Studio Sequence Diagram |
| .ser | GeneMapper Project Format |
| .server | Bonobo Activation API |
| .serverdef | Server Definition |
| .ServerStyle | ESRI ServerStyle |
| .service | Mac OS X Service Application |
| .ses | Adobe Audition Session Format |
| .session | CATIA V4 Session Format |
| .sesx | Adobe Audition Audio Session Format |
| .set | Microsoft Backup File Set |
| .settingcontent-ms | Microsoft Windows 8.1 Configuration |
| .settings | Microsoft Visual Studio Settings Format |
| .setup | CryENGINE Character Format |
| .sev | SevenUp Picture |
| .sew | Janome Sewing Machine Stitch Format |
| .sex | Alpha Five Set Index |
| .sf | IRCAM / MTU SoundFile Format |
| .sf0 | Windows Sytem Check |
| .sf2 | Creative Labs SoundFont 2.0 Bank Format |
| .sf3 | STATGRAPHICS Data |
| .sf7 | Sega SF-7000 ROM |
| .sfa | Sony Sound Forge |
| .sfap0 | Sony Sound Forge Proxy Format |
| .sfar | Mass Effect 3 DLC Add-on Format |
| .sfark | Melody Machine Compressed SoundFont |
| .sfb | Sony Playstation 3 Game Disc Description Format |
| .sfc | Nintendo SNES9x ROM Format |
| .sfcache | ReadyBoost Cache Format |
| .sfd | SoundStage Sound Data Format |
| .sff | Structured Fax Format Image Format |
| .sfi | Corel Ventura Publisher HP LaserJet Printer Font |
| .sfil | Macintosh System Sound |
| .sfk | Sound Forge Audio Peak Format |
| .sfl | Sony Sound Forge Sound Data Format |
| .sfm | Dart PRO Soundtree Structure |
| .sfn | EasySIGN Font |
| .sfo | CuteFTP Search Format |
| .sfp | Soft Font Printer Format |
| .sfpack | SFPack Compressed Soundfont Format |
| .sfr | Sonic Foundry Sample Resource |
| .sfs | Squashfs Format |
| .sft | Microsoft App-V Sequencer Format |
| .sfv | Simple File Verification Checksum Format |
| .sfvidcap | Sony Vegas Video Capture Format |
| .sfw | Seattle Film Works Graphics Format |
| .sfx | Self-extracting Compressed Archive Format |
| .sfz | SoundFont Compressed Audio |
| .sg | SnapGraphix User |
| .sg2 | Band-in-a-Box Audio |
| .sg3 | ChessDB Game |
| .sg4 | Band-in-a-Box Song |
| .sga | Relic Entertainment SGA Archive Format |
| .sgaa | Aleph One Marathon 2 Save Game Format |
| .sgb | Warhammer 40K Dawn Of War Map Format |
| .sgcpo | Case CATalyst |
| .sgd | SameGame Data |
| .sgf | StarOffice Document With Graphics |
| .sgh | Guitar Hero 3 Setlist Settings |
| .sgi | Silicon Graphics RGB Bitmap Image |
| .sgl | OpenOffice.org/StarOffice Master Document |
| .sgm | Visual Boy Advance Saved State Format |
| .sgml | Standard Generalized Markup Language Format |
| .sgn | Sierra Print Artist Sign Format |
| .sgngl | Case CATalyst |
| .sgo | ECU Update |
| .sgp | STATGRAPHICS Plus Statistics Format |
| .sgr | SGR Genome Data Format |
| .sgstn | Case CATalyst |
| .sgt | Microsoft DirectMusic Producer Segments Format |
| .sgu | Band-in-a-Box MIDI |
| .sgv | StarOffice StarDraw 2.0 Picture Image |
| .sgw | N-Track Studio Packed Song |
| .sgx | IBM Rational XDE |
| .sgz | Sigza’s SigzaLock Encrypted Format |
| .sh | Unix Bourne Shell (Bash) Format |
| .sh2 | Stronghold 2 Saved Game Format |
| .sh3 | Harvard Graphics 3.0 Presentation |
| .sh3d | Sweet Home 3D Design Format |
| .sh3f | Sweet Home 3D Model Library Format |
| .sha | Unix SHAR Archive |
| .sha1 | SHA-1 Hash Text Format |
| .sha256 | FileVerifier++ SHA-256 Hashes Format |
| .sha512 | SHA512 Hash Text Format |
| .shader | Quake 3 Arena Id Tech 3 Game Engine Shader Format |
| .shadercache | Space Marine Shader Cache |
| .shaderlib | Stronghold 3 Shader |
| .shadow | FontTwister Shadow |
| .shadowIndexCompactDirectory | Mac OS X Spotlight |
| .shadowIndexGroups | Mac OS X Spotlight |
| .shadowIndexTermIds | Mac OS X Spotlight |
| .shape | Dia Diagram Editor Shape |
| .shar | Unix Self Extracting Bourne Shell Archive Format |
| .shb | Microsoft Windows Shortcut Into A Document |
| .shc | Adobe Photoshop Contours |
| .shd | Microsoft Windows Shadow Spooler Format |
| .shdc | ArmA: Armed Assault |
| .she | Medusa 2D CAD |
| .sheet | Dia Sheet |
| .shf | Pretty Good Privacy (PGP) Share |
| .shft | Shift Work Calendar |
| .shg | Segmented Hypergraphics Bitmap Format |
| .shh | Adobe Photoshop Shadow Or Highlight Settings Format |
| .shipsection | Sword Of The Stars Ship Data |
| .shit | Bourne Shell Server Page |
| .shk | ShrinkIt Compressed Apple II File Archive |
| .shlb | Mozilla |
| .shm | Corel WordPerfect Shell Macro Library |
| .shmap | Stronghold 3 Map |
| .shn | Shorten Compressed Audio Format |
| .sho | Show Pro Show Flow |
| .shortcut | Asutype Shortcut Format |
| .show | Hancom Office Hanshow Presentation Format |
| .shp | ESRI ArcView Shape Format |
| .shpa | Marathon 2 Aleph One Shape Format |
| .shr | Unix Shell Archive Format |
| .shs | Microsoft Windows 95/98 Clipboard Format |
| .shsh | Apple IPhone ECID SHSH Format |
| .sht | HTML Server Side Include Format |
| .shtm | HTML Server Side Include Format |
| .shtml | HTML Server Side Include Format |
| .shutdownStall | Mac OS X Log |
| .shv | Husqvarna Viking Designer 1 Sewing Machine Embroidery Design Format |
| .shw | Corel Presentations Slide Show |
| .shx | AutoCAD Shape Compiled Format |
| .shy | ShyFile Encrypted Format |
| .si | AutoDesk Softimage Image Format |
| .sia | Silo 3D Model |
| .sib | Sibelius Music Notation Format |
| .sic | Quicken 2002 Order |
| .sid | LizardTech MrSID Image File Format |
| .sidb | ITunes Authorization Data Format |
| .sidd | ITunes Authorization Data Format |
| .sidn | Apple ITunes Authorization Data |
| .sidx | SharpMap Spatial Index Format |
| .sif | Microsoft Windows NT Setup Installation Format |
| .sig | Microsoft Office OneNote Signature Format |
| .sign | GNU Privacy Guard |
| .signed | Apple Safari |
| .sik | Microsoft Word Backup |
| .sil | SmartInspect Log |
| .silk | Microsoft Excel Symbolic Link Format |
| .silo | VisIt Hydrodynamical Numerical Simulation Data |
| .sim | Intel VTune Performance Monitor Format |
| .sim3 | The Sims 3 |
| .simg | Synclavier Disk Image Format |
| .simple | Simple Compiler Source Code |
| .sims2pack | The Sims 2 Package Format |
| .sims2skin | Sims 2 Skin |
| .sims3 | The Sims 3 Save |
| .sims3pack | The Sims 3 Game Package Format |
| .sin | SiN Game |
| .sinf | Apple IOS Digital Rights Management |
| .sip | Scopetrax Compressed Sample |
| .sir | Bitmap |
| .sis | Symbian Installation Format |
| .sis.dm | Nokia Ovi Store Protected Program Format |
| .sisx | Symbian OS Program Installation Executable Format |
| .sisx.dm | Nokia Ovi Store Protected Program Format |
| .sit | StuffIt Expander Archive Format |
| .sit! | StuffIt Expander Archive Format |
| .sit5 | StuffIt 5 Archive Format |
| .sitd | StuffIt Archive |
| .site | Adobe GoLive Site Specific Format |
| .sitemap | ASP .NET Site Map |
| .sites | Apple IWeb Domain Format |
| .sites2 | Apple IWeb Domain Format |
| .sithqx | StuffIt Compressed Archive |
| .sitl | StuffIt Library |
| .sito | StuffIt Translator |
| .sitx | StuffIt Archive Format |
| .siv | Silicon Imaging Video Format |
| .siz | Oracle 7 Configuration |
| .sj1 | SEGA SJ-1 DIGIO Image |
| .sjava | Synchronous Java Source Code Format |
| .sjc | Sothink JavaScript Web Scroller Definition |
| .sjd | Scrapbook Factory Deluxe Saved Journal Format |
| .sjpg | Sealed JPG |
| .sjs | Simcity 3000 Buildings Add-on |
| .sj_ | SuperJAM Audio |
| .sk | Safari Saved Browsing History Format |
| .sk1 | SK1 Vector Drawing Format |
| .sk2 | ACD/ChemSketch Drawing Format |
| .ska | Happy99 Virus |
| .skb | SketchUp Backup Format |
| .skc | SideKick For Windows Database Format |
| .skcard | Starfish Sidekick Card Format |
| .skd | Autodesk Autosketch Drawing Database |
| .ske | Battlefield Skeleton |
| .sketch | Sketch Drawing |
| .skf | Autodesk AutoSKETCH Thumbnail Format |
| .skg | Skrooge Data |
| .ski | Motorola Mobile Phone Skin Format |
| .skim | Skim Notes Format |
| .skin | Skin Format |
| .skindex | Apple Mail Index Format |
| .skinnedmesh | Battlefield Skinned Mesh |
| .skitch | Skitch Graphics Format |
| .skk | SmartSketch Drawing |
| .skl | Adobe Authorware Resource Format |
| .skm | SketchUp Materials Format |
| .skn | Skin Format |
| .sko | Sage Accounting Executable |
| .skp | SketchUp Graphic File Format |
| .skr | PGP Pretty Good Privacy Private Keyring Format |
| .sks | Show.kit Template |
| .skse | The Elder Scrolls V: Skyrim Script Extender Data |
| .skt | SSEYO Koan |
| .SkuDef | Command & Conquer Archive Description Package |
| .skv | Semicolon Separated Values Format |
| .skx | XLANG Schedule Format |
| .sky | Microsoft Multiplan SYLK Spreadsheet |
| .skypechatstyle | Skype Chat Style Format |
| .skypeemoticonset | Skype Emoticon Set Format |
| .skz | SuperKaramba Theme Format |
| .sl | Unix Software License Format |
| .sl00 | HLSW Game Server Tool |
| .sl01 | HLSW Game Server Tool |
| .sl02 | HLSW Game Server Tool |
| .sl03 | HLSW Game Server Tool |
| .sl05 | HLSW Game Server Tool |
| .sl06 | HLSW Game Server Tool |
| .sl07 | HLSW Game Server Tool |
| .sl08 | HLSW Game Server Tool |
| .sl09 | HLSW Game Server Tool |
| .sl10 | HLSW Game Server Tool |
| .sl11 | HLSW Game Server Tool |
| .sl12 | HLSW Game Server Tool |
| .sl13 | HLSW Game Server Tool |
| .sl14 | HLSW Game Server Tool |
| .sl15 | HLSW Game Server Tool |
| .sl16 | HLSW Game Server Tool |
| .sl17 | HLSW Game Server Tool |
| .sl18 | HLSW Game Server Tool |
| .sl19 | HLSW Game Server Tool |
| .sl20 | HLSW Game Server Tool |
| .sl21 | HLSW Game Server Tool |
| .sl23 | HLSW Game Server Tool |
| .sl24 | HLSW Game Server Tool |
| .sl25 | HLSW Game Server Tool |
| .sl26 | HLSW Game Server Tool |
| .sl27 | HLSW Game Server Tool |
| .sl28 | HLSW Game Server Tool |
| .sl29 | HLSW Game Server Tool |
| .sl30 | HLSW Game Server Tool |
| .sla | Scribus Document Format |
| .sla.gz | Scribus Compressed Document |
| .slackbuild | Slackware Linux Script |
| .slb | PSpice Symbols Library Format |
| .slc | 3D Systems SLiCe Format |
| .sld | Autodesk AutoCAD Slide Format |
| .sld3 | Microsoft PowerPoint 3/4 For Mac Slide |
| .sld8 | Microsoft PowerPoint 98 For Mac Slide |
| .sldasm | SolidWorks Assembly Format |
| .sldblk | SolidWorks Blocks |
| .sldbombt | SolidWorks BOM Template |
| .sldclr | SolidWorks Colour Palette |
| .slddrt | SolidWorks General Table Template Format |
| .slddrw | SolidWorks Drawing Format |
| .slddwg | SolidWorks Drawing 2D Vector Graphics |
| .sldgtolfvt | SolidWorks Geometric Tolerance Style |
| .sldholtbt | SolidWorks Hole Table Template |
| .sldlfp | SolidWorks Library Part |
| .sldm | Microsoft PowerPoint 2007/2010 Macro-enabled Open XML Slide |
| .sldmat | SolidWorks Material Database |
| .sldprt | SolidWorks Part Format |
| .sldreg | SolidWorks Settings |
| .sldrevtbt | SolidWorks Revision Table Template |
| .slds | Microsoft PowerPoint 2 For Mac Slide |
| .sldsffvt | SolidWorks Surface Finish Style |
| .sldstd | SolidWorks Drafting Standard |
| .sldtbt | SolidWorks General Table Template |
| .sldtm | SDL Translation Memory Format |
| .sldweldfvt | SolidWorks Weld Style |
| .sldwldtbt | SolidWorks Weldment Cutlist Template |
| .sldx | Microsoft PowerPoint 2007/2010 Open XML Slide |
| .sle | Sisulizer Exchange Format |
| .slf | Symantec License Format |
| .slg | Chromeleon Audit Trail |
| .sli | ENVI Spectral Library |
| .slib | Synopsys Interface Timing Specification Model |
| .slidesaver | Mac OS X Screensaver |
| .slife | Slife Database |
| .slim | Slim Script |
| .slip | CodeGear Licence |
| .slk | Microsoft Symbolic Link Format |
| .sll | Static Link Library |
| .slm | Second Life Mesh Asset |
| .sln | Microsoft Visual Studio Solution Format |
| .slnk | SAP Business All-in-One Extension |
| .slo | RenderMan Compiled |
| .slogo | StarLogo Programming Project Format |
| .slogt | StarLogo Template Format |
| .slp | SpectraLayers Pro Audio Project Format |
| .slr | ArcSWAT Solar Radiation Input |
| .sls | Image Playlist Format |
| .sls3 | Microsoft Excel 3 For Mac Template |
| .sls4 | Microsoft Excel 4 For Mac Template |
| .sls5 | Microsoft Excel 5 For Mac Template |
| .sls8 | Microsoft Excel 98 For Mac Template |
| .slst | Game Data Format |
| .slt | Mozilla Firefox/Thunderbird User Profile Folder Format |
| .sltng | StarLogo TNG Project Format |
| .slupkg-ms | XrML Digital License Package |
| .slv | Silva Import And Export |
| .slw | Settler LITE Data |
| .slx | SpectraLayers Pro Audio Project Format |
| .sly | Lilypond Guitar |
| .slz | Adobe RoboHelp Screen Layout |
| .sm | ScriptMaker Script Format |
| .sm2 | RHK Technology Proprietary |
| .sm3 | DataCAD Symbol |
| .sm4 | RHK Technology Proprietary |
| .sma | AMX Mod Plugin Source Format |
| .smaf | SMAF Synthetic Music Mobile Application Format |
| .smali | Google Android Smali Assembly Language Developer Format |
| .smb | Autodesk Symbol Library |
| .smbp | Mobipocket EBook Secured Auxiliary |
| .smc | Super Nintendo Game-console ROM Image |
| .smcl | Stata Log |
| .smd | Sega Genesis ROM Emulator Format |
| .smdl | SQL Server Updated Model |
| .sme | SmartEncryptor Encrypted Archive |
| .smf | Standard MIDI File Format |
| .smh | Sealed MHT Document |
| .smht | Sealed MHT Archive |
| .smi | Microsoft SAMI Subtitles Format |
| .smil | Synchronized Multimedia Integration Language Format |
| .smk | RAD Video Tools Smacker Compressed Video |
| .sml | SMIL Slideshow Presentation |
| .smm | Samsung Galaxy S Memo Exported Format |
| .smo | Sumotori Dreams Level Format |
| .smol | Spartan Molecule Data |
| .smp | Autodesk Sampled Station List Format |
| .smpak | SuperMemo UX |
| .smpd | Sc2gears Mouse Print Data Format |
| .smpf | Sprite Monkey Project |
| .smpo | Scalado SpeedView Meta Object |
| .smprf | System Mechanic Microsoft Windows Startup Profile |
| .smps | LINDO API |
| .smpx | Finale Accompaniment |
| .smr | Smedge2 Job Settings |
| .smrd | Adobe InDesign Format |
| .sms | Sony Ericsson Exported SMS Format |
| .smst | Adobe Soundbooth Music Score Toolkit |
| .smt | Samsung Mobile Phone Theme Format |
| .smtmp | Trojan:Win32/FakeSysdef Folder |
| .smv | VideoLink Saved Mail Video |
| .smw | SIMPL Windows Source |
| .smwt | Adobe InDesign Filter Format |
| .smx | Rational XDE |
| .smz | IBM SPSS Graphboard Template Chooser Shape Format Format |
| .smzip | StepMania Package Format |
| .sn | Sound Club Editor Compressed Song |
| .sn1 | Drive Snapshot First Differential Backup Format |
| .sn2 | Drive SnapShot Partial Disk Image Format |
| .sn4 | Drive SnapShot Partial Disk Image |
| .sna | ZX80 Spectrum Mirage Emulator Snapshot Format |
| .snag | SnagIt Capture Format |
| .snagitstamps | SnagIt Archive |
| .snagproj | SnagIt Project Format |
| .snagstyles | SnagIt Style |
| .snap | ZX Spectrum Emulator Mirage Microdrive Snapshot |
| .snapdoc | Ashampoo Snap |
| .snapfireproject | Corel Snapfire Project |
| .snapfireshow | Corel Snapfire Show Format |
| .snapshot | ZX Spectrum Emulator Mirage Microdrive Snapshot Format |
| .snapx | Snapform XML Form |
| .snb | Shanda Bambook EBook |
| .snc | ACT! E-mail/folder Synchronization |
| .snd | Sound Format |
| .snda | Marathon 2 Aleph One Sound Format |
| .sndclipping | Apple Mac OS X Finder Sound Clip |
| .sndh | Atari ST Audio |
| .sndr | Sounder Sound |
| .sndt | Sndtool Sound |
| .snf | Starry Night Document |
| .sng | Song Format |
| .sngw | Devil May Cry 4 Audio |
| .sni | MDK Game Archive |
| .snippet | Microsoft Visual Studio Code Snippet Format |
| .snk | Microsoft Visual Studio Strong Name Key Format |
| .snm | Netscape Communicator E-Mail Or News Messages Index Format |
| .snoop | Sun SNOOP Capture |
| .snp | Microsoft Access Report Shapshot Format |
| .snr | Mail.Dat Seed Name |
| .sns | Save-N-Sync Backup Project Format |
| .snsf | SNES Audio Format |
| .snt | Microsoft Windows Sticky Notes Data Format |
| .snu | AVG Anti-Virus |
| .snw | Sweave Source |
| .snx | Starcraft Saved Game |
| .so | ELF Shared Library Format |
| .so-abi | AbiWord Plug-in Format |
| .so.0 | Unix Shared Library Format |
| .soa | Sage MAS 90 Accounting Software Data |
| .soap | Simple Object Access Protocol Message (SOAP) Message |
| .sob | OpenOffice.org Impress Bimap Styles Format |
| .soc | Colour Palettes And Various Style Elements |
| .socialphonebook | Sony Xperia Google Android Contact |
| .sod | Wolfenstein 3D Spear Of Destiny Game Data |
| .soe | Star Wars Shadows Of The Empire |
| .sof | Quartus II SRAM Object |
| .soi | MENSI (Trimble) 3D Laser Enhanced 3D Scanner |
| .sol | Adobe Flash Shared Object Format |
| .solidconfig | STAR WARS: The Old Republic Launcher Config |
| .solitairesave-ms | Windows Solitaire Saved Game Format |
| .som | Corel Paradox Sort Information |
| .son | Notator SL Audio |
| .song | System 7 Sound |
| .sonic | SonicArranger Audio Format |
| .sopt | Synclavier Optical Disk Image Format |
| .sor | Corel Paradox Sort Definition |
| .sos | Dynamite VSP Swept Object Style |
| .sou | Lucas Arts Sound Format |
| .soundpack | Stardock SoundPackager Sound Package Format |
| .sounds | Quake 3 Id Tech 3 Sound Definition Format |
| .soundscript | Rigs Of Rods Sound Script Description |
| .soundstudiopreset | Sound Studio Preset |
| .sov | 3DCS Advanced Analyzer/Optimizer SOVA Model |
| .sow | Renamed ARJ Archive Format |
| .sox | Unix Sox Native Raw Sound |
| .sp | SPICE Data Format |
| .sp1 | Microsoft Windows XP With Service Pack 1 Installation |
| .sp2 | Super Ball 2 Level Format |
| .sp3 | Microsoft Windows XP With Service Pack 3 Installation Format |
| .sp4 | Roller Coaster Tycoon Saved Game |
| .sp45 | SuperCard Player Format |
| .sp7 | SAS Permanent Utility |
| .sp? | LoseThos C+ Source |
| .spa | FutureSplash Movie (Adobe Flash) |
| .spar | Spartan Chemical Modeller Output |
| .sparc | Skype Extra Plug-in Format |
| .sparsebundle | Apple Mac OS X Time Machine Dynamic Image Format |
| .sparseimage | Apple MAC OS X Sparse Disk Image Format |
| .sparsimage | Mac OS X Image |
| .spawn | S.T.A.L.K.E.R. Game |
| .spb | Samsung Kies Phone Contacts Library |
| .spc | Atari Compressed Spectrum Bitmap Format |
| .spd | Bitstream Speedo Scalable Font |
| .spdata | Microsoft Visual Studio |
| .spdb | IGO Primo Speedcam Database |
| .spdesignasax | SharePoint Designer |
| .spdesignasmx | SharePoint Designer |
| .spdesignbar | SharePoint Designer |
| .spdesignbot | SharePoint Designer |
| .spdesignconfig | SharePoint Designer Configuration |
| .spdesigncss | SharePoint Designer |
| .spdesigndoclib | SharePoint Designer Design Library |
| .spdesignfile | SharePoint Designer |
| .spdesignhomeop | SharePoint Designer |
| .spdesignhomepg | SharePoint Designer |
| .spdesignhtml | SharePoint Designer |
| .spdesignhtt | SharePoint Designer |
| .spdesignlist | SharePoint Designer |
| .spdesignlistdata | SharePoint Designer |
| .spdesignmaster | SharePoint Designer |
| .spdesignnav | SharePoint Designer |
| .spdesignnopub | SharePoint Designer |
| .spdesignopen | SharePoint Designer |
| .spdesignpiclib | SharePoint Designer |
| .spdesignresx | SharePoint Designer |
| .spdesignsitemap | SharePoint Designer Site Map |
| .spdesignskin | SharePoint Designer Skin |
| .spdesignsurvey | SharePoint Designer |
| .spdesigntheme | SharePoint Designer Theme |
| .spdesigntxt | SharePoint Designer |
| .spdesignunknown | SharePoint Designer |
| .spdesignweb | SharePoint Designer |
| .spdesignwfdoclib | SharePoint Designer |
| .spdesignxml | SharePoint Designer |
| .spdesignxoml | SharePoint Designer |
| .spdesignxslt | SharePoint Designer |
| .spdf | Sealed PDF Document Format |
| .spe | WinSpec CCD Capture Format |
| .spec | RPM Specification Format |
| .spentry | Spartan Database |
| .spf | Still Picture Interchange File Format |
| .spfx | Squeeze Preset Format |
| .spg | TCP Optimizer Saved Settings Format |
| .sph | Ribbons Sphere Format |
| .spi | ShadowProtect Incremental Disk Changes Format |
| .spidersolitairesave-ms | Microsoft Spider Solitaire Save Format |
| .spiff | SPIFF Still Picture Interchange File Format |
| .spin | Apple Mac OS X Console Spin Report |
| .spinput | Spartan Job |
| .spj | Microsoft ICE Panorama Project |
| .spk | SpyProof! Encrypted Symmetric Key Format |
| .spkz | Scribe Template |
| .spl | Microsoft Windows Printing Spool Format |
| .spl7 | SPlan Data |
| .split | Split |
| .splsp | SmartPLS Project |
| .splt | YDecode Split |
| .splx | Code Package |
| .spm | Corel WordPerfect |
| .spmo | SpeedView Meta Object |
| .spn | Corel WordPerfect Distribution |
| .spo | SPSS Output Document Format |
| .spp | Serif PhotoPlus Format |
| .sppack | SPPack Sound Sample |
| .sppt | Sealed Microsoft PowerPoint Presentation |
| .spq | SPSS Database Query Format |
| .spr | Microsoft FoxPro Form Source Format |
| .spreporter | Mac OS X System Profiler Reporter |
| .sprg | Synclavier Program Format |
| .sprite | SuperTux Sprite Format |
| .sprj | Microsoft Application Virtualization Sequencer Project |
| .sprx | Sony Playstation 3 SPRX Firmware |
| .sps | SPSS Proprietary Syntax Format |
| .spss | SPSS |
| .spt | SpeedTree Tree Data Format |
| .spu | Atari Spectrum Bitmap Image Format |
| .spub | BeLight Disc Cover Format |
| .spv | American McGee Alice Saved Game Format |
| .spw | SLIM-Master Plan Workbook |
| .spx | Ogg Vorbis Speex Format |
| .spy | SEO SpyGlass Project |
| .sq | Sysquake Program Format |
| .sqb | SQL Backup Compact MS SQL Server Backup Format |
| .sqd | Sysquake Session Data Format |
| .sqf | Sothink SWF Quicker Project Format |
| .sqfs | SquashFS Bootable Format |
| .sqh | Harbinger Game |
| .sql | Structured Query Language Data SQL Format |
| .sqldataprovider | DotNetNuke Script |
| .sqlite | SQLite Database Format |
| .sqlite-journal | Mozilla Firefox |
| .sqlite-shm | SQLite Shared Memory |
| .sqlite-wal | SQLite Quasi-persistent |
| .sqlite3 | SQLite 3 Database Format |
| .sqlite3-journal | SQLite Temporary |
| .sqlitedb | SQLite Database Format |
| .sqlitedb-shm | SQLite Database Shared Memory |
| .sqljet | Eclipse JET SQL Template |
| .sqlproj | Microsoft Visual Studio SQL Server Project Format |
| .sqm | Microsoft Service Quality Monitoring Format |
| .sqn | SAS Sequential Access |
| .sqr | SQL Structured Query Language Program Format |
| .sqs | Operation Flashpoint Game Script |
| .squ | LabWindows/CVI Test Executive Toolkit Sequence |
| .squashfs | Squashfs-tools Disk Image Format |
| .sqx | SQX Archiver Compressed Archive Format |
| .sqy | Xaira Query |
| .sqz | Squeeze Project Format |
| .sr | Sun Raster Bitmap Graphics Format |
| .sr0 | Sony SecuROM Analysis Format |
| .sr2 | Sony Digital Camera RAW Image Format |
| .sr4 | SIR Database |
| .sra | Powerbuilder Application |
| .src | Generally Source Code Format |
| .src.rpm | Red Hat Package Manager Source Format |
| .srd | PowerBuilder Data Window |
| .sre | Windows CE 5.0 |
| .srep | SuperREP Archive Format |
| .srf | Sony Digital Camera RAW Image Format |
| .srfmap | Terragen Map |
| .srg | Microsoft PowerPoint Self-registration Data Format |
| .sri | Dragon NaturallySpeaking Audio |
| .srj | PowerBuilder Project |
| .srk | Sub Rosa Client Format |
| .srl | Arquitienda Local Database |
| .srm | Super Nintendo ROM Saved Game Emulator Format |
| .srp | Checkpoint Exported VPN Client Information |
| .srpm | Linux Source RPM Package |
| .srq | Microsoft Windows Server Unprocessed Request |
| .srr | ReScene Data Recovery Archive Format |
| .srs | Microsoft Outlook Server Request Setting Format |
| .srt | SubRip Video Subtitle Format |
| .srt0 | Nintendo Wii Animation Format |
| .sru | PowerBuilder User Object |
| .srv | FBB Initialization |
| .srw | Samsung Raw Picture Image Format |
| .srx | SPARQL Query Results XML Format Result |
| .srz | DataFlex Source |
| .ss | Scheme Source Code Format |
| .ss0 | GameBoid First Saving Slot |
| .ss4 | SigScribe4 Design |
| .ssa | SubStation Alpha Subtitle Format |
| .ssage | Inbound Internet Email Message |
| .ssb | SmartSync Pro Program Setting |
| .ssc | SourceSafe Status Format |
| .sscs | Saropa Smart Copy Script |
| .ssd | Stardock WindowBlinds Skin File List |
| .ssd01 | Unix SAS Data Sets |
| .ssdl | Sonicfire Pro Music |
| .sse | StrataSearch |
| .sseq | Nintendo DS Sound Format |
| .ssf | Trimble Standard Storage Format |
| .ssfsav | Super Smash Flash Saved Game Format |
| .ssg | Single-Step Goal Template |
| .ssh | Data Fellows Secure Shell Document |
| .ssi | HTML With Server Side Includes |
| .ssif | Blu-ray Stereoscopic Interleaved Movie |
| .ssii | ProReveal Data Format |
| .ssis | ProReveal Settings Format |
| .ssisdeploymentmanifest | Microsoft Visual Studio Deployment |
| .ssiw | Corel WordPerfect 4 For Mac Document |
| .sskd | On Schedule Schedule |
| .ssl | Sunlight ScanLibrary Format |
| .ssl2 | Sunlite Suite 2 ScanLibrary Settings Format |
| .sslf | HLSW Game Server Tool Format |
| .ssm | RealAudio Standard Streaming Metafile |
| .ssml | Speech Synthesis Markup Language Source |
| .ssmssqlproj | Microsoft SQL Server Project |
| .ssn | Shutdown Scheduler Shared Notes Data |
| .ssnd | Synclavier Sound Format |
| .sso | ChessDB Search Options |
| .ssp | SAS Transport Data Format |
| .sss | WindowBlinds Substyle Format |
| .sss~ | WindowBlinds Temporary |
| .sst | Serialized Certificate Store Format |
| .ssu | Systems Management Server Hierarchy Manager Site Update |
| .ssv | ShadowFlare Saved Game Format |
| .ssw | Sealed Flash Format |
| .sswf | Sealed SWF Flash |
| .ssx | IBM Rational XDE |
| .ssy | W32/Sober-AD |
| .ssz | Spider Player Skin |
| .st | Atari Disk Image Format |
| .st0 | SPICE Status |
| .st1 | SPICE Status |
| .st2 | SPICE Status |
| .st3 | SPICE Status |
| .st4 | Pinnacle Studio 400 Project |
| .st45 | SuperCard Trial Project Format |
| .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 Photo |
| .st9 | SPICE Status |
| .sta | Abaqus/CAE Information Summary Format |
| .stap | Apple Soundtrack Pro Project Format |
| .startupinfo | E-Prime 2.0 Startup Info Format |
| .stat | Statistics |
| .state | Windows Photo Gallery User |
| .states | IconX Preset |
| .staticmesh | Battlefield Static Mesh |
| .stats | FreeSurfer Statistics Format |
| .status | UDraw(Graph) |
| .stb | AutoCAD R2000 Plot Style Table |
| .stbom | CATIA Stbom |
| .stc | OpenOffice.org Calc Spreadsheet Template Format |
| .std | Adobe Acrobat Exchange Plug-in Format |
| .stdl | Swift To-Do List Database |
| .ste | Adobe Dreamweaver Backup Site Settings Format |
| .steamstart | Valve Steam Start Format |
| .step | ISO-10303 STEP Product Data |
| .stf | Microsoft ACME Setup Table Format |
| .stfx | SampleTank Settings |
| .stg | Microsoft ActiveSync Backup Format |
| .sth | Lotus Domino Stash Format |
| .sti | StarOffice Presentation Template Format |
| .stip | SampleTank Instrument Preset |
| .stk | Personal Stock Monitor Format |
| .stl | Stereolithography Format |
| .stm | HTML Server Side Include Format |
| .stmb | Synclavier Timbre Format |
| .stml | HTML Server Side Include Format |
| .stmp | Apple Soundtrack Pro Project |
| .stn | ArcView Geocoding Standardization |
| .stn= | Genuine Fractals STING |
| .sto | PRO100 Project Format |
| .story | Storyist Document |
| .storyboard | Interface Builder Storyboard Document |
| .storyisttheme | Storyist Application Theme Format |
| .storymill | StoryMill Project Format |
| .stot | Mac OS Help Index |
| .stp | ISO-10303 STEP Product Data Format |
| .stproj | Samsung Theme Designer Project Format |
| .stq | StatSoft Statistica Text |
| .str | DBase Structure List Object Format |
| .strd | Octatrack Project |
| .streamed | Rage Id Tech 5 Game Language |
| .strg | E-Viewer Recorded Video Copy Backup |
| .strings | Text Strings Format |
| .strk | Geologger Track Format |
| .strm | Plex Media Server Settings |
| .struct | Microsoft XPS Document Structure |
| .sts | ScreamTracker Song Format |
| .stsg | SuperTux Saved Game |
| .stt | Microsoft Streets & Trips Map Template Format |
| .sttpl | Samsung Theme Designer Template Format |
| .stu | Pinnacle Studio Video Project Format |
| .stub | Mac OS X Stub Library |
| .stuff | Eve Online Game Archive |
| .stvproj | Microsoft Visual Studio |
| .stw | OpenOffice.org Text Document Template |
| .stwm | SuperTux Map Format |
| .stx | Pinnacle Studio Project Format |
| .stxt | Sealed Text Document |
| .sty | LaTeX Style Format |
| .styk | Stykz Stick Figure Format |
| .stykz | Stykz Animation Format |
| .styl | Stylus CSS Script |
| .style | SketchUp Style Format |
| .styles | Steam Client GUI Resource |
| .stz | Screamtracker 2 Module Format |
| .su | SUwin Project |
| .su3 | Su3De |
| .su? | Standard Mail Archive |
| .sua | SeeYou Airspace |
| .sub | DivX Movie Subtitle File Format |
| .sublime-build | Sublime Text Build |
| .sublime-completions | Sublime Text Completions |
| .sublime-keymap | Sublime Text Keymap |
| .sublime-menu | Sublime Text Menu |
| .sublime-mousemap | Subliem Text Mousemap |
| .sublime-package | Sublime Text Compressed Extension Package |
| .sublime-project | Sublime Text Project Format |
| .sublime-session | Sublime Text Session |
| .sublime-settings | Sublime Text Settings |
| .sublime-theme | Sublime Text Theme |
| .sublime-workspace | Sublime Text Workspace Settings Format |
| .suc | Softrans Hello Engines! 2.1 |
| .sucatalog | Apple Mac OS X Software Update SUCatalog |
| .suck | SiteSucker Website Format |
| .sud | WISCO Word Power Sudoku Number Puzzle Format |
| .suf | Ccrypt Encrypted Format |
| .sugar | Espresso Plug-in Format |
| .sui | StarSplatter User Interface Format |
| .suit | Apple Mac OS Font Format |
| .suite | Stardock WinStyles Suite |
| .sul | Gfa Raytrace Image |
| .sum | Summary Format |
| .sumo | Sumo Paint Image Format |
| .sun | Sun Raster Bitmap Image Format |
| .sun4 | SunOS Solaris 4 |
| .suniff | Sun TAAC Bitmap Image Format |
| .suo | Microsoft Visual Studio Solution User Options Format |
| .sup | Subtitle Bitmap Format |
| .supp | Apple IOS Format |
| .supported | MAC OS X |
| .sur | Freelancer Three Dimensional Collision Zone Data |
| .surf | Surf 3D Scanner |
| .surfplace | Microsoft Money User Profile |
| .sus | Synergy Accounts Update Script |
| .sut | ELITEpro Data Logger |
| .sv$ | AutoCAD Autosave Format |
| .sv1 | RollerCoaster Tycoon Saved Game |
| .sv2 | RollerCoaster Tycoon Saved Game |
| .sv2i | Symantec Backup Exec System Index Format |
| .sv4 | RollerCoaster Tycoon Saved Game |
| .sv4cpio | System V Release 4 CPIO Archive |
| .sv4crc | GnuWin32 CPIO Checksum Data |
| .sv5 | BigJig Saved Puzzle Format |
| .sv6 | RollerCoaster Tycoon 2 Saved Game Format |
| .sv8 | RollerCoaster Tycoon |
| .sva | Sharp Manga Browser Comic Format |
| .svb | STATISTICA Macro |
| .svc | Microsoft Visual Studio ASP.NET WCF Web Service Format |
| .svclog | Microsoft Visual Studio Diagnostics |
| .svcmap | Windows Communication Foundation WCF Reference |
| .svd | Microsoft Word Document Autosave Format |
| .sve | Simutrans Format |
| .svf | Simple Vector Format |
| .svg | XML Based Vector Graphics Format |
| .svgz | Compressed SVG (Scalable Vector Graphics) Format |
| .svh | Fly! Simulated Vehicle Specification |
| .svi | Samsung Video Format |
| .svl | Scramdisk Volume |
| .svm | OpenOffice.org StarView Metafile |
| .svn | Personal Paint Slovenian Language User Interface |
| .svn-base | Apache Subversion Base Format |
| .svn-work | CollabNet Subversion Cache Format |
| .svo | STATISTICA Macro |
| .svp | Virtual DJ Visualization Effects |
| .svq | Roland Keyboard Midi Sequence |
| .svr | Compressed Virtual World |
| .svs | Microsoft Word Style Sheet Autosave Format |
| .svt | Torchlight Saved Game Format |
| .svw | SpecView Format |
| .svx | Sound File (Amiga 8SVX Format) |
| .svz | Savez |
| .sw | 16-bit Audio Sound Raw Signed PCM Data Format |
| .sw0 | SPICE Sweep Operations Output |
| .sw1 | SPICE Sweep Operations Output |
| .sw2 | SPICE Sweep Operations Output Format |
| .sw3 | SPICE Sweep Operations Output |
| .sw4 | SPICE Sweep Operations Output |
| .sw5 | SPICE Sweep Operations Output |
| .sw6 | SPICE Sweep Operations Output |
| .sw7 | SPICE Sweep Operations Output |
| .sw8 | SPICE Sweep Operations Output |
| .sw9 | SPICE Sweep Operations Output |
| .swa | Adobe Shockwave Music Format |
| .swav | Nintendo DS Audio Format |
| .swb | Adobe Photoshop |
| .swc | Adobe Flash Component Distribution Format |
| .swd | Adobe Flash Debug Format |
| .swdb | ClarisWorks 3 And 4 Database |
| .swe | NHL Ice Hockey 2002 Required |
| .sweb | SpiderWEB Document |
| .swf | ShockWave Flash, Animated Vector Format For The Internet |
| .swf2 | Flash |
| .swfl | Shockwave Flash |
| .swg | SWAG Pascal Snippets (SWAG Reader) |
| .swgr | ClarisWorks Version 3/4 Drawing |
| .swi | SWiSH Format |
| .swidtag | Software Identification Tag |
| .swift | Apple Swift Programming Language Source Code |
| .swish-e | SWISH-E |
| .switch | Egress Switch Package Format |
| .switchboard | Adobe SwitchBoard Server |
| .swj | SolidWorks Journal Format |
| .swk | StudyWorks Save Format |
| .swl | Macromedia Flash Format [Alternate] |
| .swlt | SafeWallet |
| .swm | Windows Imaging Format Split Archive Format |
| .swn | Vim Temporary |
| .swo | Vim Temporary |
| .swp | Swap Format |
| .swq | SWAT Stream Water Quality Input |
| .sws | SWiSh Studio |
| .swss | ClarisWork Spreadsheet |
| .swt | Swift Generator Template Format |
| .swtag | Adobe Creative Suite Software Tag |
| .swv | Microsoft Sidewinder Game Voice Settings Format |
| .sww | ANNO Saved Game Format |
| .swz | Adobe Flash Player Signed RSL Format |
| .sx | SimplexNumerica Data Format |
| .sxc | OpenOffice.org 1.0 Spreadsheet Format |
| .sxd | OpenOffice/StarOffice Drawing |
| .sxe | ProfiCAD Document |
| .sxg | OpenOffice.org Master Document Format |
| .sxi | OpenOffice.org Presentation Format |
| .sxl | Sealed Excel Worksheet |
| .sxls | Sealed Excel Spreadsheet |
| .sxlsx | Sealed Microsoft Excel 2007 Worksheet |
| .sxm | OpenOffice.org 1.0 Math Format |
| .sxml | Sealed XML Document |
| .sxs | SAS Stat Studio Module Source Code |
| .sxt | Propellerheads Reason 2 NN-XT Sound Format |
| .sxv | Action Repeater Macro |
| .sxw | OpenOffice.org Writer Document Format |
| .sxx | SAS Stat Studio Module Executable |
| .sy | Simplexety Data Format |
| .sy0 | WordExpress |
| .sy1 | Synth 1 Patch |
| .sy3 | Harvard Graphics Symbol Format |
| .sy7 | Synchro Studio 7 Output |
| .syb | Syberia II Game Archive Format |
| .syc | Sniffer Capture |
| .syd | SYSTAT Data |
| .syg | SYSTAT Graph |
| .syh | Synchomatic Instrument Format |
| .syk | Microsoft Excel Symbolic Link Format |
| .sylk | Microsoft Excel For Mac Symbolic Link Format |
| .sym | Symbols Library Format |
| .syn | Synthesis Audio Format |
| .sync | Apple ColorSync |
| .syncdb | ITunes Saved Contact Database |
| .syndarticle | Paralllels Desktop |
| .synk5licence | Synk 5 Licence |
| .synklicence | Synk Licence |
| .synu | Synthetic Universe Image Format |
| .syp | SYP Source |
| .sys | System Format |
| .sys-old | Cygwin Terminfo |
| .sysk | Cygwin Terminfo |
| .system | Vega Strike Virtual System Format |
| .systemIncludeDirectoriesList | Java Language |
| .syv | Outline 4D |
| .syw | Yamaha SY-85/SY-99 Wave Format |
| .syx | MIDI System Exclusive Message |
| .sy_ | Korg Dw8000 Compressed Format |
| .sy~ | CorelDRAW |
| .sz | Winamp Skin Format |
| .sz3 | ScreamTracker V3 |
| .sza | HiCAD NeXt Construction |
| .szf | SilverDAT II Data Exchange Format |
| .szp | SecureZIP Policy |
| .szs | Mario Kart Wii Game Archive Format |
