SAE SAR SART Satellite Digital Radio Satellite News Gathering SAW-filter S-band SBR S-DAB SDH S-DMB SDR SDSL SECAM Semafonie Semi-duplex Sensor Server side scripting Service provider Servlet SET SETI Set-top-box Server Side Includes SFN SGSN SHDSL SHF Signalering SIM SIM lock Simplex Single sideband SIP Skype Slotted Aloha SMIL SMS SMSC SMS-CB SMTP Snelheidsradar SNG SNMP Soft-handover Software Defined Radio Spam SPC Spectrum masker Specific Absorption Rate Spectral Band Replication Spider SPIT SQL SRD SRR SRDoc SS7 SSB SSI SSL STiMi Stockholm '61 STM Straalverbinding System Reference Document