| SHOE |
Simple HTML Ontology Extensions |
| SHRS |
Sehen, Hören, Riechen, Schmecken (Multimedia) |
| SHTTP |
Secure HTTP |
| SHV |
Standard High Volume |
| SI |
Shift In |
| SI |
System Information |
| SI |
Signalling Rate Indicator |
| SI |
Simple Interface (Cray to UNIX) |
| SI |
Source Index |
| SI |
Still Image (Exchange) |
| SI |
Service Interaction |
| SI |
Systeme International de Unites |
| SIA |
Semiconductor Industries Association |
| SIA |
Serial Interface Adapter |
| SIAM |
Supraleitendes Intelligentes Antennen-Modul |
| SIB |
Scaled Index Based |
| SIC |
Standard Industry Code |
| SICAS |
Semiconductor International Capacity Statistics |
| SID |
Security Identification/Identifier |
| SID |
Silence Descriptor |
| SID |
Station Identification |
| SID |
Sudden Ionospheric Disturbance |
| SID |
Symbolic Interactive Debugger |
| SIE |
Serial Interface Engine |
| SIFS |
Short Inter Frame Space |
| SIFT |
Stanford Information Filtering Tool |
| SIG |
Selective Integral Ground |
| SIG |
Software/Special Interest Group |
| SIGCAT |
Special Interest Group on CD-ROM Applications and Technology |
| SIGG |
Signaturgesetz |
| SIGIR |
Special Interest Group on Information Retrieval |
| SIGPLAN |
Special Interest Group on Programming Languages |
| SIH |
Super Information Highway |
| SII |
Static Invocation Interface |
| SIIT |
Stateless IP/ICMP Translation (Algorithm) |
| SILC |
Secure Internet Live Conferencing |
| SILK |
Speech, Image, Language, Knowledge |
| SIM |
Subscriber Identification/Identity Module |
| SIM |
Set Initialization Mode |
| SIMA |
Support Initiative for Multimedia Applications |
| SIMD |
Single Instruction Multiple Data (stream) |
| SIMM |
Single Inline Memory Module |
| SIMP |
Simple Intermachine Protocol |
| SIMPLE |
Sheer Idiots Monopurpose Programming Language Environment |
| SIMPLE |
SIP for Instant Messaging and Presence Leveraging Extensions |
| SIN |
Service Indicator (ISDN) |
| SINA |
SISY Integriertes FTP-Server Archiv, Karlsruhe |
| SINA |
Sichere Internet-Anbindung/Architektur (BSI) |
| SINPO |
Signal strength, Interference, Noise, Propagation disturbance, Overall merit |
| SIO |
Simultaneous Interface Operation |