S
Sector ID
Service Instance
Service Option
Serving System
SID – System ID
SID/NID Lockout List
SIP – Session Initiation Protocol
SMS – Short Message Service
SMSC – Short Message Service Centre - See SMS
Soft Handoff
SO33 – Service Option 33 - See Service Option
SO59 – Service Option 59 - See Service Option
SPC – Service Programming Code, same as MSL (Master Subsidy Lock)
Subnet ID
Supplementary Services
SSPR – System Selection for Preferred Roaming
System table - See PRL
Read more about this topic: List Of CDMA Terminology