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SI source index (EN)
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SI status indicator (EN)
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SI système international (EN)
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SI secondary in (FDDI) (EN)
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SI serial input (EN)
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SI shift in (control character) (EN)
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SI service indicator (SS7) (EN)
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SI service information (DVB) (EN)
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Si silicon (EN)
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SI 0 sequenced information 0 (ISDN) (EN)
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SI 1 sequenced information 1 (ISDN) (EN)
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SI-EER site infrastructure energy efficiency ratio (EN)
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SI-POF step index plastic optical fiber (EN)
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Si3N4 silicon nitride (EN)
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SIA serial interface adapter (EN)
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SIA semiconductor industries association (EN)
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SIA SCSI industry association (EN)
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SIA service initiation application (EN)
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SIA security industry association (EN)
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SIaaS software infrastructure as a service (cloud computer) (EN)
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SIAS standard Intel architecture system (Server) (EN)
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SIB status indication busy (GSM) (EN)
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SIB service independent building block (IN) (EN)
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SiB system in board (EN)
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SIC successive interference cancellation (NOMA) (EN)
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SiC silicon carbide (EN)
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SID silence insertion descriptor (EN)
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SID shared information and data model (NGOSS) (EN)
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SID sound interface device (EN)
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SID security identifier (EN)
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SID system identification (EN)
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SID service ID (cable modem) (EN)
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SID security identification (EN)
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SIDF system independent data format (NetWare) (EN)
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SIDL synchron IDL (EN)
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SIDO single input dual output (SIMO) (EN)
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SIE status indication emergency (SS7) (EN)
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SIEM security information and event management (EN)
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SIF stateful inspection firewall (EN)
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SIF safety instrumented function (SIS) (EN)
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SIF signalling information field (SS7) (EN)
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SIF source input format (file format) (EN)
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SIF station information frame (FDDI) (EN)
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SIF step index fiber (fiber optics) (EN)
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SIFS short interframe space (802.11) (EN)
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SIG signalling user interface (ATM) (EN)
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SIG special interest group (EN)
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SIG signalling (EN)
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SiGe silicon germanium (EN)
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SigG Signaturgesetz (DE)
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SigI Signaturgesetz-Interoperabilität (DE)
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SIGTRAN signalling transport (IP/IETF) (EN)
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SigV Signaturverordnung (DE)
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SII static invocation interface (CORBA) (EN)
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SII speech intelligibility index (acoustics) (EN)
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SIIA software & information industry association (EN)
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SIL single inline (EN)
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SIL safety integrity level (safety) (EN)
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SIL speech interference level (audio) (EN)
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SILC secure Internet live conferencing (EN)
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SILS standard for interoperable LAN/MAN security (802.10) (EN)
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SIM set initialization mode (HDLC) (EN)
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SIM system integration map (NM) (EN)
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SIM security information management (EN)
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SIM subscriber identity module (mobile communications) (EN)
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SIMD single instruction multiple data (computer) (EN)
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SIMEG subscriber identity module expert group (ETSI) (EN)
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SIMM single inline memory modul (EN)
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SIMO single input multiple output (WLAN) (EN)
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SIMPLE SIP for instant messaging and presence leveraging extension (EN)
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SIN service indicator number (ISDN) (EN)
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SIN status indication normal (SS7) (EN)
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SIN signal induced noise (audio) (EN)
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SINAD signal to noise and distortion (EN)
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SINP session identity notification protocol (EN)
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SINR signal to interference plus noise ratio (EN)
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SINUS satellite integration into networks for UMTS service (EN)
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SIO simultaneous interface operation (peripherals) (EN)
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SIO service information octet (MSU) (EN)
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SIO serial input/output (EN)
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SiO2 silicon dioxide (EN)
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SIP subject interface package (EN)
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SIP single inline package (chip design) (EN)
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SIP strategy, infrastructure & product (NM) (EN)
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SIP session initiation protocol (IP) (EN)
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SIP serial interface processor (EN)
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SiP system in package (Chip) (EN)
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SIP service interface point (EN)
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SIP SMDS interface protocol (WAN) (EN)
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SIP-T session initiation protocol for telephones (EN)
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SIPO serial in, parallel out (EN)
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SIPP simple Internet protocol plus (IP) (EN)
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SIPP single inline pinned package (chip design) (EN)
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SIPS secure session initiation protocol (SIP) (EN)
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SIR sustained information rate (ATM) (EN)
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SIR serial infrared (IrDA) (EN)
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SIR silicon rubber (EN)
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SIR surface insulation resistance (EN)
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SIRI speech interpretation and recognition interface (iOS) (EN)
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SIRO service in random order (EN)
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SIS service incident standard (management) (EN)
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SIS structure information store (OSI) (EN)
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SIS single instance storage (deduplication) (EN)
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SIS satellite information services (EN)
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SIS SUC ID server (Z-Wave) (EN)
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SIS safety instrumented system (SIL) (EN)
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SISD single instruction single data (computer) (EN)
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SISO single input single output (WLAN) (EN)
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SISR single-input signature register (test) (EN)
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SIT satellite interactive terminal (EN)
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SIT static induction transistor (EN)
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SIT Sonderinformationston (DE)
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SITh static induction thyristor (SCR) (EN)
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SIVR speaker independent voice recognition (EN)
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SIW submission interworking (paging) (EN)
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SIX stream index (XML) (EN)
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