Internet Abbreviations and Acronyms
- SIDRSecure Inter-Domain Routing
- SIGNCSpecial Internet Group Name Cache
- SIIOState Internet Information Office
- SIJShuswap Internet Junction
- SILCSecure Internet Live Conferencing
- SILSSchool of Information and Library Studies
- SIMShzt, It's Monday
- SIMSubject Is Message
- SIMONSystem of Internet Mapping for Organized Navigation
- SJSvalbard and Jan Mayen Islands
- SJCThe Sonny and Jason Connection
- SJDSam Jack Directory
- SJMSvalbard and Jan Mayen Islands
- SJMISvalbard and Jan Mayen Islands
- SJWSocial Justice Warriors
- SJWSSocial Justice Warriors
- SKSlovakia
- SKSpawn Kill(ing)
- SK8Skbte
- SK8Skate
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