.??_ Files ending in "_" are often compressed install files of the same
name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.)
.S Assembler Source Code
Scheme Source Code
Microsoft Train Simulator Shape File
.S$$ Temporary Sort File
.S$N Mindstore Digital Wallet File (M$A$W$.S$N)
.S?? RAR Compressed File (?? can be 01 to 99 after .R99)
.S01 WordPerfect Distribution File
.S02 WordPerfect Distribution File
.S03 WordPerfect Distribution File
.S16 Sigames File
.S17 SubSeven Saved Settings File
.S19 Motorola Assembly-Language Program ASCII-HEX Data File
.S28 Genesis or Sega32X Rom Image
.S2P Sonnet File
.S31 SmartWhois (network information utility)
.S3D EverQuest File
Strata 3D (3D modeling/animation)
.S3I ScreamTracker v3 Instrument [use Winamp]
.S3M ScreamTracker v3 Sound File [use Winamp]
.S4T Patent Application Specification Authoring Tool (PASAT) File
.S4W Patent Application Specification Authoring Tool (PASAT) File
.S3Z ScreamTracker v3 File [use Winamp]
.S7P SubSeven Trojan File
.S8 Simul8 Simulation
.SA1 Panasonic e-wear MP3 Player File
.SA4 STABCAL (stability calculation for aqueous systems) File
.SA8 Street Atlas File
.SAB ModelMaker File (3D scanner)
ACIS Solid Binary File (any ACIS-based CAD program)
.SAC Adobe Shared Asset Catalog
.SAD Serveron Analyzer Data File
Electronic Arts Black & White Game Sound File [Dragon UnPACKer]
.SAF MusicMatch Jukebox Secure Audio File
.SAH SETI@Home Data File
.SAK Software Administration Kit (Customer Tracking for Shareware Authors)
.SAL Soritec Data
.SAM Ami Pro Text File
Map File (HOSTS.SAM - Maps IP addresses to machine names)
Signed 8-bit Sample Data
CalTech PaleoMag Data File
.SAN The Curse of Monkey Island Movie File
Legacy of Kain Series Game File
.SAR Phoenix Server Applications Standard Distribution Format
(.JAR file in special directory)
Sons Of The American Revolution Family Tree Creator Data
Saracen Paint [XnView]
.SAS SAS System File (statistical anaysis)
.SAT ACIS Solid Model (any ACIS-based CAD program)
.SAV Backup
Saved File (various)
Saved Configuration Info (various)
.SB Audio File
Raw Signed Byte (8-bit) Data
.SBD Storyboard Editor Storyboard
.SBF Superbase 95 File
.SBI Sound Blaster Instrument File
.SBK Emu SoundFont v1.x Bank Files
Superbase 95 File
Creative Labs SB AWE 32
Statfoot32 Soccer League Tracking File
SWiSH Backup File (Flash animation)
.SBL Shockwave Flash Object
Softbridge Basic Language
.SBM Hello Network HelloCombined Media Player (MultiPlatform Streaming Media Player)
.SBN ArcView Spatial Index For Read-Write Shapefiles (GIS-related)
.SBP Superbase DML Program
Scratchboard
SetupBuilder Professional Projects File
.SBR Source Browser Support File
.SBS SWAT HRU Output File (river basin scale model)
.SBT Superbase Record Notes
.SBW Savings Bonds Wizard (U.S. Treasury program)
.SBX ArcView Spatial Index For Read-Write Shapefiles (GIS-related)
.SC Framework Screen Driver
Paradox Source Code
Ingres Embedded SQL/C Source File
.SC? ColoRIX Image (? can vary) [XnView]
.SC2 Sample Cell
SimCity 2000 City
II PC Instrument
Schedule+ File
SAS Catalog
MSX 2 Screen [XnView]
.SC3 Harvard Screen Driver (Harvard Graphics taken over by Serif)
SimCity 3000 File
dBase Screen Mask File
.SC4 RollerCoaster Tycoon Scenario
Creative NOMAD MP3 Manager
.SCA SCA Datafile
Scala InfoChannel Script
Norton Anti-Virus File
.SCANNER Scanner Output File (usually a bitmap image) -
Note: I've had reports of this but cannot confirm
.SCB Scala InfoChannel Published Script
System Cleaner
.SCC Text File
Stamp Collector's Girl Friday Catalog File
Source Safe File
.SCD Graphic (SCODL Scan Conversion Object Description Language)
Schedule+ File
TurboTax Schedule File
.SCE SoftCuisine Data Exchange File
.SCF Windows Explorer Command
Symphony Spell Checker Configuration
Photo Soap2 File
ScoreMaker Multimedia Show
.SCG Septerra Core Saved Game
.SCH Schedule+ File
EAGLE Schematic File
OrCad Schematics File
P-CAD Schematic File
Xlinix Foundation Schematic
XML Schema
.SCI ScanVec Inspire File
ColoRIX Image [XnView]
SciFax FAX [XnView]
System Configuration Data
.SCL SCALA Scale
.SCM SchematicMaker (Topanga Software) File
ICQ Sound Compressed Sound Scheme
Scheme Program
ScreenCam Movie
Starcraft Map File
.SCN Compressed Screen format
TrueSpace2 Scene
Pinnacle Studio Scene File (Info about scenes found in same-named .AVI)
Scenario File For Many Games Including: Age of Empires, Age of Empires: Rise of Rome,
Seven Kingdoms, SimCity Classic, SimCity 2000, SimCity 3000, SimCity 3000 Unlimited
.SCO High Score (various)
ObjectJ AuthorJ Saved Lesson
Scĝĝp Script (IRC Client/script)
.SCP Script (various)
.SCR Faxview Fax
Screen Saver
Procomm Plus Screen Snapshot File
Script (various)
DOS DEBUG Input File (can be any extension but often .SCR)
LocoScript Screen Font File
Statistica Scrollsheet
Movie Master Screenplay (DOS software replaced by Hollywood Screenplay)
Sun Raster Graphic [XnView]
.SCRIPT Desktop DNA Application Script
VBScript File
.SCS StuffIt Saved Criteria
OzWin CompuServe E-mail/Forum Access SYSOP File
Samsung Q105 Phone Screen Saver
Omron CX-Supervisor (Factory Automation)
.SCS_TOR Insight II Torsion File
.SCT Foxpro Screen
PC Tools Script Tools
Scitex Continuous Tone Bitmap [XnView]
SAS Catalog
OzWin CompuServe E-mail/Forum Access Forum Section Names
Windows Script Component
Lotus Screen Capture Text
.SCV ScanVec CASmate File
.SCW Score Writer Document (music score)
.SCX Microsoft FoxPro Screen File
ColorIRX Image File [XnView]
Stanford Chart
Starcraft Map File
.SCY ReaGeniX Security File
.SD Sound Designer I Audio
Insight II Structure Data File
.SD0 Dali Raw File [XnView]
.SD1 Dali Raw File [XnView]
.SD2 Sound Designer II Flattened File
Sound Designer II Data Fork
SAS Database
Dali Raw File [XnView]
.SD7 Daktronics Venus 7000 Electronic Sign Schedule
.SD! OzWin CompuServe E-mail/Forum Access Custom Messsage Search Online
.SDA StarOffice Drawing
OpenOffice.org Drawing
Fidonet Software Distribution Network Archive Description
SoftCuisine Data Archive
PGP Encrypted Executable
.SDB Simply Accounting File
Group Mail Subscriber Plug-in File
Microsoft Win2000 Security Configuration and Analysis Database
STRIP SDB Utility File
.SDC StarOffice Spreadsheet
OpenOffice.org Spreadsheet
.SDD StarOffice Presentation
OpenOffice.org Presentation
.SDE Steganos Disk Encryption File
.SDF Standard Data Format
Standart-Delay-Format (Chip design gatelevel-delay data exchange...
e.g., Synopys to Modelsim)
Schedule Data File
System File Format
Autodesk MapGuide Spatial Data Files
.SDG Star Office Gallery [XnView]
.SDI Fidonet Software Distribution Network Info
Borland Single Document Interface
.SDK Roland S-series Floppy Disk Image
Autosketch Drawing
.SDL SmartDraw Library
OzWin CompuServe E-mail/Forum Access Custom Messsage Search
.SDN Shell Archive
Fidonet Software Distribution Network Compressed Archive
.SDO DB/TextWorks Database Deferred Update Directory (into .DBR file)
.SDOC Sealed Word File [Unsealer]
.SDP QuickTime Session Description Protocol File (resides on server;
contains info about format, timing, & authorship of streamed media)
Real Player File
StarOffice Picture File
.SDR SmartDraw Drawing
.SDS StarOffice Chart
OpenOffice.org Chart
Raw Midi Sample Dump Standard File
.SDT SmartDraw Template
Dungeon Keeper 2 Archive [Dragon UnPACKer]
Theme Park World Archive [Dragon UnPACKer]
.SDU Edwards Systems Technology File (EST Signature Device fire alarm panel
management)
.SDV Semicolon Divided Values File
.SDW StarOffice Text
OpenOffice.org Text Document
Raw Signed DWord (32-bit) Data
Lotus WordPro Graphic
.SDX Midi Sample Dump Standard Files Compacted by SDX
.SDV Pinnacle Studio DV Video Editing Project
.SE ScopeEdit Project File
.SEA Macintosh Compressed Archive File [StuffIt]
.SEB Franklin eBookMan Format
.SEC Compressed Archive File
Disney Animation Studio Secured Animation File
PGP Secret Key Ring
MP3 Music File (unverified)
.SEE LISCAD Plus File
.SEF Steganos Encrypted File
.SEG Compressed File Segment
.SEL PaintShop Pro Selection File
.SEM ZX Spectrum-Emulator Snapshot
.SEO ScopeEdit Object File
.SEP TIFF Bitmap Separation
.SEQ Atari Animation File
TestStand Sequence File
Bubble Chamber Sequential Instruction File
Chromeleon Sequence List
LifeForm File
Stad File [XnView]
Power Tracks Pro Music Sequencer File
Insight II Amino Acid Sequence File
.SEQU Acrobat Sequence File
.SES Digital Audio Editor File
Clarion Modula-2 Session Data
Hummingbird Exceed X-Session
Shadow Security Scanner Session
.SET Driver Set
Image Settings
Backup File Set
Configuration (various)
AutoCAD(LT) Set File
.SEU Serials 2000 Encrypted S2K Update
.SEW Janome (New Home) Sewing Machine File
Embroidery Design File [possibly read with Melco Sizer Software]
.SEX Urban Chaos Game File
.SF Sound File [Linux Player]
OS/2 WPS Attribute Storage
IRCAM SoundFile
Powerhouse Subfile Data File (contents defined by .SFD dictionary)
.SF2 Emu SoundFont v2.0 File
Creative Labs Soundfont 2.0 Bank File
.SFA Sonic Foundry Video Editor Audio File
.SFB STRIP SDB Utility Backup File
.SFC Snes9x (freeware Super Nintendo Entertainment System (SNES) emulator)
.SFD SoundStage Sound File Data
Powerhouse Subfile Dictionary (describes .SF file contents)
.SFE Split Files Shell Extension
.SFF Fritz Fax-Print File
Stage Scene File
Structured Fax Format [XnView]
.SFI Ventura Printer Font
SoundStage Sound File Info
SIS Framegrabber Graphics
.SFK Sound Forge Peak Data File
.SFL Ventura Printer Font
LaserJet Landscape Font
.SFM DART Pro 98 Soundtree Structure
.SFN SPX Font
.SFO CuteFTP Search File (CUTESEARCH.SFO)
.SFP Ventura Printer Font
LaserJet Portrait Font
.SFR Sonic Foundry Sample Resource
.SFS StarOffice Frame
OpenOffice.org Frame
PCL 5 Scalable Font
.SFT Chiwriter Screen Font
.SFV QuickSFV/WinSFV Checksum File
Easy SFV Creator
fsum (free command line checksum file creator/verifier)
.SFW Seattle Film Works File (Actually MGI PhotoSuite File) [Filmworks
Viewer] [XnView] [IrfanView]
.SFX Self-extracting Archive
.SG ABC Snap Graphics User File
.SG1 Stanford Graphics
.SGA SEG-A Seismic Data Format (SEG=Society of Exploration Geophysicists)
[data processing: Lacey]
.SGB SEG-B Seismic Data Format (SEG=Society of Exploration Geophysicists)
[data processing: Lacey]
.SGC SEG-C Seismic Data Format (SEG=Society of Exploration Geophysicists)
[data processing: Lacey]
.SGD SameGame Data File
SEG-D Seismic Data Format (SEG=Society of Exploration Geophysicists)
[data processing: Lacey]
.SGF Smart Game Format
StarWriter Document
Sonique Document with Graphics
.SGI Silicon Graphics IRIS Graphic File [XnView] [IrfanView]
.SGIF Sealed GIF File [Unsealer]
.SGL StarOffice Master Document
OpenOffice.org Master Document
.SGM SoftQuad XMetaL File
.SGN Sierra Print Artist Sign
.SGO SansGUI Object Library File (compiled class definitions and objects
for building models)
.SGP Statgraphics Plus Statistics
SansGUI Project Model File (model configurations and input parameters
defined by simulation users for simulation runs)
Acoustica MP3 Audio Mixer File
.SGS SansGUI Schema Definition File (class schemas defined for a simulator)
.SGT Hitman Game Sound File
DirectMusic Producer
Signature Keyboard Macro
.SGU GJDV Word Processor Keyboard Definition File
Band-in-a-Box File
.SGW Settler GOLD for Windows Data File
.SGY SEG-Y Seismic Data Format (SEG=Society of Exploration Geophysicists)
[data processing: Lacey]
.SH UNIX shar Archive File
UNIX/LINUX Shell Script
.SH3 Harvard Presentation (Harvard Graphics taken over by Serif)
.SHADER Script File for Game Textures (ASCII file--but, it's easier
if you use Photoshop)
.SHB Corel Background File
Document Shortcut File
.SHD Print Spooler Shadow File
ArcView ARC/INFO Shadeset Symbol File
.SHE Medusa CAD File [Outdated. Medusa CAD sold by PTC to CAD Schroer.]
.SHG Hotspot Editor Hypergraphic
.SHIFTS ARIA PIPP Chemical Shifts File
.SHK Apple II Compressed Archive File
.SHM WordPerfect Shell Macro
.SHN Shorten Audio Compression File [Additional]
.SHP 3D Studio Shapes File
GIS Software Geographic Shape File [GIS info]
(ArcView, et.al.) (JShape/FShape)
3D Modeling File (various)
Command & Conquer File [Format]
.SHR UNIX shar Archive File
.SHS Shell Scrap Object File
.SHTM HTML File Containing Server Side Directives
.SHTML HTML File Containing Server Side Directives
.SHW Corel Presentation
WordPerfect Slide Show
Expression Off-line 3.1 Show File (off light-board show editing)
Show File
.SHX AutoCAD Shape Entities
GIS Software Geographic Shape Index File [GIS info]
(ArcView, et.al.) (JShape/FShape)
.SI SoftImage Image File [XnView]
.SIB Sibelius Music File
.SID Commodore64 Music File [Player] MIME type: audio/prs.sid
LizardTech MrSID Photo [Free plug-in viewer]
.SIF Windows NT Setup File
Autodesk Spatial Index File
.SIG Signature File
Print Shop Sign File
.SIK Backup File
.SIM Simulation (various) (e.g. Setup for Nascar4)
Aurora [XnView]
PowerDVD File (powerdvd.sim)
PC Finder 2002C (Trace stolen computers)
.SIR SIR (Scientific Information Retrieval) Database (ver 1-3)
BYU SIR [XnView]
Solitaire Image Recorder [XnView]
.SIS SymbianOS Installer File (application installation archive)
Nokia Phone Game File
.SIT StuffIt Compressed Archive File (Multiple platforms)
Sinclair Snapshot
.SITHQX StuffIt Compressed Archive File (Multiple platforms)
.SIV ShopCalc Pro File (Cabinet Door & Drawer Cutting List Calculator Invoice)
.SIX SIXEL Graphic
.SIXEL SIXEL Graphic
.SIZ Oracle 7 Configuration
.SJ1 Sega SJ-1 DIGIO [XnView]
.SJF Split Files Shell Extension
.SJPG Sealed JPEG File [Unsealer]
.SJX Seljax Estimating and 3D Design
.SKA PGP Secret Keyring
.SKB QuickPOS (Point-Of-Sale) Standard Keyboard Layout File
.SKC Isis Draw Sketch File (chemical drawings)
.SKCARD Sidekick File (now a discoutinued product of Starfish which
maintains a FAQ)
.SKD WinOrbit File
AutoSketch File
VEX Format File
Max Payne Model File
.SKF Autosketch
.SKL Authorware Resource
.SKN FileWrangler/SecurDesk!/ImageForge Graphic Skin
eRocket eBook Skin
The Sims (Maxis) 3D Body Mesh Skin Data
Skantek [XnView]
.SKR Microsoft ScriptIt
.SKY ActiveSky Movie Clips for Palm OS
.SKZ coverXP Skin File
.SL S-Lang Program File
PACT's Save Layout
EROSION 3D Soil Parameters [Format (pdf)]
.SLB AutoCAD Slide Library
.SLC Telix Compiler SALT Script
.SLD AutoCAD Slide
STABCAL (stability calculation for aqueous systems) File
.SLDASM Solidworks Assembly File
.SLDDRW Solidworks File
.SLDLFP Solidworks File
.SLDPRT Solidworks File
.SLF Shopcalc List File (Cabinet Door & Drawer Cutting List Calculator)
Suppose Stand List File
SLIDE: Scene Language for Interactive Dynamic Environments File
SuperLink Folder Manager for Readers
Mail Warden
Segment Layout File (IMS Database related)
SortWizard Export Format
.SLG Chromeleon Audit Trail
AutoCAD Status Log
.SLI MagiCorp Side Service Slide
.SLK Data Exchange File (Symbolic Link - Often used by Excel)
Timeslips Lock File
.SLL Sound File
.SLM Microsoft Visual FoxPro
.SLN Microsoft Visual Studio Solution
.SLP Timeslips Data File
.SLT Telix SALT Script Application
Super Level Loader Snapshot [Format]
.SLW Settler LITE for Windows Data File
.SLY Parts of a Lilypond Guitar File (ASCII text)
.SM Smalltalk Program File
SoftSpoken Mailer Mailing List
ScriptMaker Script
Simentor Data File
Samna Word Text File
.SM3 DataCAD Symbol File
.SMC Super Nintendo Game-console ROM Image [See ZNES or SNES9x]
.SMCL Stata Saved Formatted Logs
.SMD StarOffice Mail
OpenOffice.org Mail Document
Sega Genesis/Mega Drive Emulator
Polyphonic Ringtone File for Phones
.SMF StarOffice Formula
OpenOffice.org Formula
Smartfax Fax
Standard MIDI File [Quicktime]
.SMHT Sealed MHT Archive [Unsealer]
.SMI RealPlay SMIL File
Self Mounting Image File (Apple Macintosh)
.SMIL Synchronized Multimedia Integration Language [RealPlay]
.SMK Smacker Compressed File
Starcraft Portrait File
.SML Simple Markup Language
Synchronized Multimedia Integration Language File [RealPlay]
[Quicktime]
.SMM Ami Pro Macro
.SMOV Sealed QuickTime Movie File [Unsealer]
.SMP Sample or Samplevision Format
Sound File [Linux Player]
Ad Lib Gold Sample
PhotoImpact Gallery File
.SMP3 Sealed MP3 File [Unsealer]
.SMPEG Sealed MPEG Movie [Unsealer]
.SMPG Sealed MPG Movie [Unsealer]
.SMRD Adobe InDesign Import/Export Filter
.SMS Microsoft Package Definition File (used now in place of .PDF)
Sega Master System Emulator
.SMT HiPer-Six Memo File
SmartWare II Text File
Creator Simulation Symbol File
.SMV Streaming Mobile Video File [Viewer]
Matlab File
Cadence Symbolic Model Verifier File
.SMWT Adobe InDesign Import/Export Filter
.SMX Statistica Matrix Spreadsheet
.SNA Mirage Microdrive Snapshot [ | 