Extensie	Dezvoltatorul tipului de fișier	Categoria de fișiere	Descrierea tipului de fișier	Software	Dezvoltator software
.SB	MIT Media Lab	Fişiere de programator	Scratch Project File	Apple QuickTime Player	Apple
.SD2	Avid Technology	Fişiere audio	Sound Designer II File	Apple QuickTime Player	Apple
.SD2F	Avid Technology	Fişiere audio	Sound Designer II File	Apple QuickTime Player	Apple
.SDP	Oracle Corporation	Fişiere de date	StarOffice Presentation File	Apple QuickTime Player	Apple
.SDS	Oracle Corporation	Fişiere de date	OpenOffice.org Chart	Apple QuickTime Player	Apple
.SDX	Kivuto	Fișiere neobișnuite	Kivuto Secure Download Manager File	Apple QuickTime Player	Apple
.SMF	Oracle Corporation	Fişiere text	StarMath Formula File	Apple QuickTime Player	Apple
.SMI	Apple	Fişiere de imagini de disc	Self-Mounting Disk Image	Apple QuickTime Player	Apple
.SMIL	"Synchronized Multimedia" Working Group (SYMM WG)	Fişiere video	SMIL(Synchronized Multimedia Integration Language) Presentation File	Apple QuickTime Player	Apple
.SML	ESRI	Fişiere de programator	ARC/INFO Simple Macro Language File	Apple QuickTime Player	Apple
.SND	Open Source	Fişiere audio	Sound File	Apple QuickTime Player	Apple
.SNG	Korg	Fişiere audio	Korg Trinity Song File	Apple QuickTime Player	Apple
.SPX	Xiph.Org	Fişiere audio	Ogg Vorbis Speex File	Apple QuickTime Player	Apple

Deschidere fişier