SACD (super audio compact disc)
SAL (soft adjacent layer)
SAS (serial attached SCSI)
SASI (Shugart Associates System Interface)
SATA (Serial ATA)
SCAT (Single Chip AT)
SCMS (serial copy management system)
SCSI (small computer system interface)
SD (super density or secure digital)
SDLC (synchronous data link control)
SDLT (Super DLT)
SDRAM (synchronous DRAM)
SDSL (symmetrical DSL)
SE (single ended)
SEC (single edge contact)
SEC-DED (single-bit error-correction double-bit error detection)
SECAM (Sequential Couleur Avec Memoire)
SECC (single edge contact cartridge)
SECC2 (single edge contact cartridge 2)
SEP (single edge processor)
SEPP (single edge processor package)
SER (soft error rate)
SGRAM (synchronous graphics RAM)
SIMD (single instruction multiple data)
SIMM (single inline memory module)
SIPP (single inline pin package)
SiS (Silicon Integrated Systems)
SLIP (Serial Line Internet Protocol)
SMART (Self-Monitoring Analysis and Reporting Technology)
SMBIOS (system management BIOS)
SMI (system management interrupt)
SMM (system management mode)
SMPTE (Society of Motion Picture and Television Engineers)
SNR (signal-to-noise ratio)
SODIMM (small outline dual inline memory module)
SOJ (small outline J-lead)
SPD (serial presence detect)
SPDIF (Sony/Philips Digital Interface)
SPGA (staggered pin grid array)
SPI (SCSI Parallel Interface)
SPS (standby power supply)
SPSYNC (spindle synchronization)
SRAM (static RAM)
SSE (Streaming SIMD Extensions)
SSI (Server System Infrastructure)
STP (shielded twisted pair)
SVGA (Super Video Graphics Array)
SWAP (Shared Wireless Access Protocol)
SWEDAC (Swedish Board for Technical Accreditation)
SXGA (Super Extended Graphics Array)