S	SCC1
S	SCC2
S	Segmentation
S	Slave
S	Spare
S	Supervisory
S	size
S	symbol
S1	Scenario 1
S2	Scenario 2
S3	Scenario 3
SA	Service Announcement
SA	Spectrum Analyzer
SA	Spectrum/signal Analyzer
SA	System Adaptor
SA	System Architecture
SA	security association
SA	security associations
SA	spectrum analyzer
SAA	Server-Assignment-Answer
SABM	Set Asynchronous Balance Mode
SABM	Set Asynchronous Balanced Mode
SAC	Service Area Code
SAC	semi anechoic chamber
SAD	Security Association Database
SAD	Signal Activity Detector
SAD	security association database
SAE	System Architecture Evolution
SAF	Service Announcement Function
SAF	Signalling active flag
SAI	SMS availability indication
SAI	Service Area Identifier
SAI	Service Area Identity
SAI	Signature Algorithm Identifier
SAIC	Single Antenna Interference Cancellation
SAM	Specific Anthropomorphic Mannequin
SAML	Security Assertion Markup Language
SAP	Service Access Point
SAP	Service Access Points
SAP	Signalling Access Protocol
SAP	Stream Access Point
SAPI	Service Access Point Identifier
SAR	Server-Assignment-Request
SAR	Specific Absorption Rate
SAS	Security Attribute Service
SAS	Stand-Alone SMLC
SAT	SIM Application Toolkit
SAV	Semi-autonomous Validation
SB	Synchronisation Burst
SB	Synchronization Burst
SB3	scheduling block 3
SBA	Scene-Based Audio
SBA	Service based architecture
SBA	Signalling Based Activation
SBAS	Satellite Based Augmentation Systems
SBC	Session Border Control
SBCF	Session Based Charging Function
SBI	Service Based Interfaces
SBI	Service-Based Interfaces
SBL	Source Block Length
SBMA	Service Based Management Architecture
SBN	Source Block Number
SC	SIP Client
SC	Service Centre
SC	Service Continuity
SC	Speech Coder
SC	State Change
SC	Super-Charger
SC	source count
SCC	Serving Cell Change
SCCP	Signaling Connection Control Part
SCCP	Signalling Connection Control Part
SCEF	Service Capability Exposure Function
SCF	Service Capability Feature
SCF	Service Control Function
SCF	Session Charging Function
SCF	Spectral Centroid Features
SCG	Secondary Cell Group
SCI	Service Class Indicator
SCI	Sidelink control information
SCI	Subscriber Controlled Input
SCLDR	SCF Control Less Digits Received
SCM	Single-Connection Mode
SCM	Spatial Channel Model
SCMF	Security Context Management Function
SCMR	Signalling connection maintain request
SCN	sub-channel number
SCNF	Specific Core Network Functions
SCP	Service Communication Proxy
SCR	Sustainable Cell Rate
SCS	Service Capability Server
SCS	Sub-carrier spacing
SCSM	Specific communication service mapping
SCT	Security Compliance Testing
SCTP	Stream Control Transmission Protocol
SCTS	Service-Centre-Time-Stamp
SCU	System Control Unit
SD	Slice Descriptor
SD	Slice Differentiation
SD	Slice Differentiator
SD	Spare Digit
SD	Standard Deviation
SDAP	Service Data Adaptation Protocol
SDCF	Sponsored Data Connectivity Function
SDF	Service Data Flow
SDF	Service Data Function
SDF	Service Discovery Function
SDFP	Small Data Fast Path
SDK	software development kit
SDM	Spatial division multiplexing
SDN	Service Dialling Numbers
SDNC	Software Defined Networking Controller
SDP	Session Description Protocol
SDR	Sustainable Data Rate
SDR	Sustained Data Rate
SDS	Service Domain Selection
SDS	Short Data Service
SDT	Service Description Table
SDT	Small Data Transmission
SDU	Service Data Unit
SE	State Estimation
SE	spectral efficiency
SE	summation error
SEM	Spectrum Emission Mask
SEPP	Security Edge Protection Proxies
SEPP	Security Edge Protection Proxy
SES	Speech Enabled Services
SF	Shadow fading
SF	Spreading Factor
SF	shadow fading
SF	sparsity factor
SF	spreading factor
SF	stealing flags
SFH	Slow Frequency Hopping
SFI	Short File Identifier
SFN	Single Frequency Network
SFN	System Frame Number
SFR	Syndicated Feed Reception
SFS	Special Facility Selection
SFT	Segment Fetch Time
SG	Signalling Gateway
SGC	Service gap control
SGDU	Service Guide Delivery Units
SGML	Subscriber Group Member List
SGSN	Service GPRS Support Node
SGSN	Serving GPRS Support Node
SHB	super higher band
SHF	Speech Handler Function
SHO	Selected Home Operator
SI	Screening Indicator
SI	Segmentation Indication
SI	Segmentation Info
SI	Service Indicator
SI	Service Information
SI	Stall Indicator
SI	Stalling Indicator
SI	Status Inspection
SI	Study Item
SI	Synchronization Indication
SI	System Information
SI	supplementary information
SI3	System Information 3
SIA	Subscriber-Information-Answer
SIB	System Information Block
SIC	Successive Interference Cancellation
SID	Single Index Designation
SIG	Special Interest Group
SIM	Subscriber Identity Module
SIM	Subscriber Identity Modules
SIP	Session Initiation Protocol
SIP	Session Initiation Protocol's
SIP	Session Inititation Protocol
SIR	Subscriber-Information-Request
SIRF	System Information Retrieval Function
SISA	Signal-In-Space Accuracy
SLA	Service Level Agreement
SLA	Spending-Limit-Answer
SLA	service level agreement
SLA	service level agreements
SLA	service-level agreement
SLC	Signalling Link Code
SLF	Subscription Locator Function
SLI	Service Level Interworking
SLO	Single Log Out
SLP	Signalling Link Protocol
SLR	Send Loudness Rating
SLR	Sending Loudness Rating
SLR	Session Loss Rate
SLR	Side Lobe Ratio
SLR	Spending-Limit-Request
SLR	Subscriber Location Report
SLS	Service Level Specification
SLS	system-level simulation
SLT	Service List Table
SM	Session Management
SM	short message
SM&O	Service Management &Operations
SMC	Session Management Client
SME	Short Message Entity
SMF	Session Management Function
SMLC	Serving Mobile Location Centre
SMLC-BSS	Serving Mobile Location Center -Base Station System
SMLC-BSS	Serving Mobile Location Centre -Base Station System
SMN	Shared MBMS network
SMS	Service Management System
SMS	Short Message Service
SMS	Short Message Storage
SMS	Short message service
SMS-CB	Short Message Service -Cell Broadcast
SMSC	Short Message Service Centre
SMSCB	Short Message Service Cell Broadcast
SMSF	Short Message Service Function
SMSP	Short Message Service Parameters
SMSR	Short Message Status Reports
SN	Secondary Node
SN	Sequence Number
SN	Slot Number
SN	Subscriber Number
SN	sequence number
SNA	Shared Network Area
SNA	Status-Notification-Answer
SNA	Subscribe-Notifications-Answer
SNAC	Shared Network Area Code
SNC	Service Negotiation Command
SND	Sequence Number Down
SNI	Server name indication
SNN	Serving network name
SNP	Sequence Number Presence
SNP	Signalling Network Protocol
SNR	Single Number Reach
SNR	Status-Notification-Request
SNR	Subscribe-Notifications-Request
SNRM	Set Normal Response Mode
SNS	Sequence Number Space
SNS	Sub-Network Service
SNSF	Serving Node Selection Function
SNU	Sequence Number Up
SO	Segment Offset
SO	Sharing Operators
SO	Subscription Owner
SOA	Service Oriented Architecture
SOAP	Simple Object Access Protocol
SOD	Services On-Demand
SON	Self Organizing Networks
SON	Self-Organizing Network
SON	Self-Organizing Networks
SON	Self-organizing network
SON	self-organising networks
SOR	Steering of Roaming
SP	Security Policy
SP	Service Provider
SPA	Standard Privacy Assessment
SPC	Signalling Preconfigured Channel
SPD	Security Policy Database
SPD	Security Problem Definition
SPD	Suggested Presentation Delay
SPDF	Service Policy Decision Function
SPF	Service Portal Function
SPI	Security Parameter Index
SPI	Security Parameter Indices
SPI	Security Parameters Index
SPI	Subscriber Privacy Impact
SPK	Server Protection Key
SPK	Signalling Protection Key
SPR	Subscriber Profile Repository
SPR	Subscription Profile Repository
SPRTI	Strictly Periodic Registration Timer Indication
SPS	Semi-Persistent Scheduling
SPT	Service Point Trigger
SPT	Short Processing Time
SQM	Slice Quota Management
SR	Scheduling Request
SR	Security Requirements
SR	scheduling request
SRB	Signalling Radio Bearers
SRB	signalling radio bearer
SRD	Short Range Devices
SRF	Signalling Relay Function
SRF	Specialized Resource Function
SRF	speech recognition framework
SRGS	Speech Recognition Grammar Specification
SRI	Satellite Radio Interface
SRM	Similarity Ring Metric
SRNI	SGW Restoration Needed Indication
SRR	Session Reporting Rules
SRS	Sounding Reference Signal
SRS	Sounding Reference Symbol
SRS	sounding reference signal
SRS	sounding reference symbol
SRVCC	Single Radio Voice Call Continuity
SS	Segmentation Status
SS	Silence Suppression
SS	Solution Set
SS	Solution Sets
SS	Supplementary Service
SS	Supplementary services
SS	Synchronisation Shift
SS	System Simulator
SS	satellite simulator
SS	system simulator
SS7	Signalling System 7
SSAS	ship security alert system
SSE	Server-Sent Events
SSF	Service Selection Function
SSF	Service Switching Function
SSF	Slice Selection Function
SSI	Secondary System Information
SSL	Secure Sockets Layer
SSML	Speech Synthesis Markup Language
SSMU	single source multi-unicast
SSN	Starting sequence number
SSN	Sub-System Number
SSO	Single Sign On
SSO	Single Sign-On
SSP	SCPTM scheduling period
SSPS	Semi-static point selection
SSR	State Space Representation
SSRP	Synchronization Signal Received Power
SSS	Secondary Synchronization Signal
SSS	second synchronization signal
SSS	secondary synchronization sequence
SSS	secondary synchronization signal
SST	Slice Service Type
SST	Subsystem Status Test
ST	Spanning tree
ST	Stuffing Table
STA	Session-Termination-Answer
STC	Signalling Transport Converter
STD	Selective Transmit Diversity
STD	State Transition Diagrams
STI	Session Transfer Identifier
STMR	Side Tone Masking Rating
STN	Session Transfer Number
STN	Signalling Transport Network
STR	Session-Termination-Request
STS	Short-term sensing
SU	spectrum utilization
SUT	System Under Test
SVC	Scalable Video Coding
SVN	Software Version Number
SWT	Sliding window technique