File Extension Glossary

http://www.gateway2000.com/support/custserv/glossary/fileformat/s.htm (Amiga Plus Extra No. 5/97, 05/1997)

*.s3m*		Scream Tracker 3.x sound format. Edits up to 32 digital tracks, 255 instruments, allows for 16 bit ADPCM packed stereo samples, 9 Adlib FM channels (only playable on SB or SB Pro) and 8 octaves.
*.saf*		Standard Archive Format.
*.scr*		Screensaver file. These files can be found in your operating system directory and contain the source for your screensaver.
*.sdml*		Spatial Data Modeling Language format. Used for storing CAD and GIS data such as found in Landscape Planning, Design, and Architectural databases.
*.sdn*		Shareware Distribution Network format. Archive format.
*.sea*		Self Extracting Archive file format. A Macintosh file format similar to the PC .exe file format.
*.sf*		Stream Format. A record format read and written to by CAD programs. See also .gds format.
*.sgi*		Silicon Graphics Image format. Native file format of the limage image library found on Silicon Graphics workstations. Also known as .rgb format.
*.shar*		Shell Archive. Shell script that expands into several files.
*.shg*		Segmented Hyper-Graphic format. Used by Microsoft in the WinHelp on-line help facility found in Windows 3.1 to save a graphic and store the coordinates of specific areas known as "hotspots". When the user selects a hotspot, WinHelp jumps to another part of the help documentation via a hyper-text link macro stored in the .shg file.
*.shk*		ShrinkIt file format. An Apple II compression/archiving format.
*.sit*		Stuff It file format. Common Macintosh archiving and compression format.
*.snd*		Sound. A file format used by a variety of different computers.
*.spiff*		Still Picture Interchange File Format. Intended to replace the .jfif file format, adding features (more colorspaces, a recognized way of including text blocks, etc.), and provding a backwards-compatability allowing SPIFF files to be read my most JPEG/JFIF decoders.
*.sqz*		Squeeze It format. A file compressor and archiver that supports security envelopes, list files and creates self-extracting archives.
*.sys*		System file. Utilized by the Windows OS to perform system operations.