| rvt | VersaPro Reference View Table |
| rwplugin | RapidWeaver Plugin |
| rws | Borland C++ Resource Workshop Symbol Data |
| rwsnippet | RapidWeaver Snippet File |
| rwstyle | RapidWeaver Style File |
| rwtheme | RapidWeaver Theme File |
| rwx | RenderWare Script |
| rxd | RapidPLUS XML Application File |
| rxml | Roxen Macro Language Document |
| rxs | Borland Reflex Database Screen Driver Data |
| ooRexx Script |
| s | Assembly Source Code |
| s3e | Cocos2d-x S3E Executable |
| s43 | IAR System MSP430 Assembly Source Code |
| s4e | Airplay SDK Header File |
| s5d | STEP 5 Program |
| s5p | STEP 5 Project |
| s62 | Code::Blocks Assembly Source Code |
| s7f | STEP 7 Project |
| s7l | STEP 7 Library Data |
| s7p | STEP 7 Program |
| sa | Unix Shared Library |
| Unix Static Library |
| sab | Sedona Framework Binary Application |
| sac | Single Assignment C Code |
| sal | Gupta Scalable Application Language File |
| sap | Stadium Application |
| sapz | Stadium Archive |
| saq | SAS 6 Sequential Engine Access Descriptor Data |
| sar | JBoss Service Archive |
| sas | SAS Program |
| sas7bpgm | SAS Stored Program |
| sas7bput | SAS Permanent Utility |
| sas7butl | SAS Utility |
| sass | Sass Indented Syntax Data |
| savgao | Aleph One Saved Game Data |
| sax | Sedona Framework XML Application |
| sb | App Sandbox Configuration |
| Laird smartBASIC Source Code |
| Small Basic Source Code |
| sbi | SetupBuilder Include Script |
| sbl | Shockwave Flash Object |
| sbr | Visual Studio Source Browser Data |
| µVision Source Browser Information |
| sbres | Small Basic LitDev Resource |
| sbsx | Microsoft Storyboard Shapes File |
| sbt | SBT Build Definition |
| sbx | GLBasic Shoebox Data |
| sc | Esterel Unsorted Circuit Code |
| SuperCollider Source Code |
| sca | Scala InfoChannel Script |
| scala | Scala Source Code |
| scat | RealView Scatter-loading Data |
| scb | Scala InfoChannel Published Script |
| scc | Microsoft Visual SourceSafe File |
| sce | Scilab Script |
| scenesettings | Amazon Lumberyard FBX Rules Data |
| scex | Modgen Scenarion Data |
| sci | Scilab Macro Definitions |
| scm | CLEO Compiled Script |
| MIT App Inventor Layout Data |
| PDP-10 Source Compare Data |
| Scheme Source Code |
| scn | Godot Engine Binary Scene Data |
| scode | Sedona Framework Compiled Code |
| sconscript | SCons SConscript Configuration |
| sconstruct | SCons Makefile |
| scp | Microsoft Windows 95 Dial-up Script |
| scpp | TestComplete C++Script Unit |
| scpt | AppleScript Script |
| scptd | AppleScript Script Bundle |
| scq | SAS 6 Catalog Data |
| scr | Xilinx ISE FPGA Editor Script |
| µVision Linker Scatter Loader |
| screen | Indigo Studio Screen Data |
| script | WinHelp Related Script |
| scriptsuite | AppleScript Script Suite |
| scriptterminology | AppleScript Terminology Data |
| scro | Amira Script Object |
| scs | TestComplete C#Script Unit |
