Check all full forms of S here

CODE	ABBREVIATION
SDS	Sales and Distribution Systems / Switched Data Service / Synchronous Data Set
SDSAF	Switched Digital Services Applications Forum
SDSC	San Diego Supercomputer Center / Synchronous Data Set Controller
SDSE	Shadowed Directory Service area specific Entry
SDSF	System (Spool) Display and Search Facility
SDSI	Simple Distributed Security Infrastructure
SDSL	Single-line Digital Subscriber Line / Symmetric Digital Subscriber Loop
SDTV	Standard-Definition Television
SDU	Service Data Unit
SDX	Storage Data Acceleration(Xceleration)
SE	Session Entity / Society Elite / Sweden / Switching Element
SEA	Self Extracting Archive (usually as .SEA) / Society for Electronic Access / System Enhancement Associates
SEAL	Screening External Access Link / Secure Electronic Authorization Laboratory / Secure Electronic Authorization Laboratory / Simple and Efficent Adaption Layer
SEAS	Signaling Engineering and Administration System
SEC	Second (usually as sec) / Single Edge Contact
SECAM	SEquential And Memory / Sequential Couleur Avec Memoire / Systeme En Couleur Avec Memoire
SECB	Severely Errored Cell Block
SEDA	Staff and Education Development Association
SEE	Systems Equipment Engineering
SEF	Severely Errored Framing /
SEF/AIS	Severely Errored Framing Alarm Indication Signal
SEG	Semiconductor Engineering Organization
SEH	Structured Exception Handling
SEI	Software Engineering Institute
SEIS	Software Engineering & Information Systems (research group)
SEK	Swedish Electrical Commission
SEL	Selector
SELV	Safety Extra-Low Voltage (circuit)
SEM	System Error Message
SEP	Someone Else's Problem
SEPP	Secure Electronic Payment Protocol (specification)
SEQUEL	Structured English QUEry Language
SERC	Science and Engineering Research Council
SES	Service Evaluation System
SESFE	Severely Errored Second Far End
SESP	Severely Errored Second Path
SET	Secure Electronic Transaction(s) (specification)
SETE	Smiling Ear To Ear
SETS	Selected Executable Test Suite
SF	Science Fiction / Sign Flag / Single Frequency / Summarization Function / Supervision-control Frequency / Switching Fabric
SFA	Sales Force Automation
SFAIAA	So Far As I Am Aware
SFD	Simple Formattable Document
SFE	Secure Front End
SFI	Single Frequency Interface / Society for the Freedom of Information
SFLA	Stupid Four Letter Acronym
SFMC	Satellite Facility Management Center
SFQL	Structured Full-text Query Language
SFS	Suomen Standardisoimisliitto (Standards Association of Finland)
SFT	System Fault Tolerance
SFU	Store and Forward Unit
SG	Signal Ground / Study Group / Supergroup
SGA	Sysops Guild Association
SGAUA	Scitex Graphic Arts Users Association
SGFS	Special Group on Functional Standardization
SGI	Silicon Graphics Inc.
SGISP	Special Group on International Standardized Profiles
SGML	Standard Generalized Markup Language / Standard Generic Markup Languange
SGML-B	Standard Generalized Markup Language - Binary
SGMLB	Standard Generalized Markup Language Binary
SGMP	Simple Gateway Management Protocol / Simple Gateway Monitoring Protocol
SGND	Signal Ground
SGRAM	Synchronous Graphics Random Access Memory
SH	Shared
SHA	Secure Hash Algorithm / Swedish Hackers Association
SHDSL	Single-Line - High-bit-rate Digital Subscriber Line
S-HDSL	Single-Line - High-bit-rate Digital Subscriber Line
SHEFC	Scottish Higher Education Funding Council
SHERIFF	Statistical Heuristic Engine to Reliably and Intelligently Fight Fraud
SHF	Super High Frequency
SHIBNI	SHIpped But Not Invoiced
SHID	Slaps Head In Disgust
SHIT	See here - you're gonna get kicked :)
SHM	Shi* Happens Mate
SHS	Secret Hackers Society
SHT	Short Holding Time
SHTML	Super HyperText Markup Language
S-HTTP	Secure HyperText Transfer Protocol
SHV	Standard High Volume
SI	Shift In (ASCII) / Source Index / SPDU Identifier / Status Indicator / Step Index
SIA	Semiconductor Industry Association / Stable Implementation Agreements
SIC	Serial Interface Card / Silicon Integrated Circuit / Standard Industrial Classification
SICS	Sitting in Chair Snickering / Service Implementation Conformance Statement
SID	Satanic Incarnate of Doom / Security IDentifier / Signaling Identifier / Source Identifier / Sudden Ionospheric Disturbance / Switch Interface Device / System IDentification
SIDF	System Independent Data Format
SIDH	System Identification Home
SIF	Standard Input Format
SIG	Special Interest Group
SIGCAT	Special Interest Group on CD-Rom Applications and Technology
SIGWEB	Special Interest Group on the World Wide Web
SIIN	Shi* if I Know
SIL	Semiconductor Injection Laser
SILS	Standard for Interoperable LAN Security
SIM	Service Industry Marketing / Subscriber Identity Module
SIMA	Strategic (Support?) Initiative for Multimedia Application
SIMCA	sitting in my chair amused
SIMD	Single Instruction Multiple Data
SIMM	Single Inline Memory Module
SIMP	Satellite Information Message Protocol
SINA	Static Integrated Network Access
SIO	Security Information Object
SIP	Single In-line Package / SMDS Interface Protocol
SIPL	State In Programming Languages
SIPP	Single In-line Pin Package / Single Internet Protocol Plus
SIPRNET	Secret IP Router Network (usually as SIPRnet)
SIR	Speaker Independent Recognition
SIRDS	Single Image Random Dot Stereograms
SIS	Structured Information Store / Standardisering-skommissionen In Sverige (Swedish Standards Committee)
SIT	Special Information Tones
SITA	Society for International Telecommunications for Aeronautics
SITD	Still in the dark
SIVR	Speaker Independent Voice Recognition
SJG	Steve Jackson Games
SJWG	Security Joint Working Group
SK	Sofdox Krackers
SKIP	Simple Key management for Internet Protocols
SKISM	Smart Kids Into Sick Methods
SKU	Stock Keeping Unit
SL	Section Leader / Session Layer
SLA	Service Level Agreement
SLAC	Stanford Linear Accelerator Laboratory
sLag	So Lovely a Guy
SLAP	Sounds Like A Plan
SLC	Semiconductor Laser Configurations / Service Level Contract / Software License Configurator / Subscriber Line Charges / Subscriber Loop Carrier
SLD	Second Level Domain
SLE	Screen List Editing / Screening Line Editor
SLED	Single Large Expensive Disk
SLF	Smurf Liberation Front
SLI	Southern Lights Incorporated (usually as SLi)
SLIC	Subscriber Line Interface Card / Subscriber Line Interface Circuit
SLIM	Subscriber Line Interface Module
SLIP	Serial Line Interface Protocol / Serial Line Internet Protocol
SLMR	Silly Little Mail Reader
SLR	Service Level Reporter / Single Lens Reflex (camera)
SLS	Sequential Logic Systems / Storage Library System
SLT	System Load Tape
SLU	Secondary Logical Unit / Serial Line Unit
SM	Snail Mail / Standby Monitor / Switching Module
SMA	Sub-Miniature Assembly
SMAE	Systems Management Application Entity
SMAP	Systems Management Application Process
SMAPI	Simple Messaging Application Programming Interface
SMART	Source Migration And Reporting Tool
SMAS	Supplementary MAin Store / Switched Maintenance Access System
SMASE	Systems Management Application Service Element
SMASF	Switched Maintenance Access System Frame
SMASPU	Switched Maintenance Access System Power Unit
SMB	Server Message Block (protocol)
SMC	Secretariat Management Committee / Sleep Mode Connection / Standard Microsystems Corporation
SMCC	Sun Microsystems Computer Company
SMD	Storage Module Device
SMDF	Subscriber Main Distributing Frame
SMDI	Simplified Message Desk Interface / Storage Module Disk Interconnect / Subscriber Message Desk Interface
SMDL	Standard Music Description Language
SMDR	Station Message Detailed(ing) Recording
SMDS	Switched Multimegabit Data Service / Switched Multi-Megabit Data Service / Switched Multi-Megabit Data Services
SME	Society of Manufacturing Engineers
SMF	Single Mode Fiber
SMFA	Systems Management Functional Area
SMG	Super Master Group
SMI	Structure of Management Information / System Management Interrupt
SMIB	System Management Information Base
SMIME	Secure Multimedia Internet Mail Extension / Secure Multipurpose Internet Mail Extensions
SMIS	Specific Management Information Service
SMISE	Specific Management Information Service Element
SMK	Shared Management Knowledge
SMM	System Management Mode
SMO	Serious Mode On / System Management Overview
SMOff	Serious Mode Off
SMOP	Simply a Matter Of Programming / Small Matter Of Programming
SMP	Service Message Blocks / Symetric MultiProcessing / Session Management Protocol / Standby Monitor Present / Symmetrical Multiprocessing
SMPDU	Service Message Protocol Data Unit / System Management Protocol Data Unit
SMPTE	Society of Motion Picture and Television Engineers
SMRAM	System Management Random Access Memory
SMRP	(AppleTalk) Simple Multicast Routing Protocol
SMRT	Signal Message Rate Timing
SMS	Self-Maintenance Services / Service Management System / Service Management Systems / Short Message Service / Station Management System / Storage Management Services / Storage Management Subsystem / Systems Management Server
SMSA	Standard Metropolitan Statistical Area
SMSP	Storage Management Services Protocol / Simple Mail Transfer Protocol / Simple Mail Transport Protocol
SMU	Strategic Marketing Unit
SN	Sequence Number
SNA	Systems Network Architecture
SNACP	SubNetwork Access Protocol (usually as SNAcP)
SNADS	Systems Network Architecture Distribution Services
SNAFU	Situation Normal All "fixed" Up or Fouled UP or Fu**ed Up
SNAP	Sub-Network Access Protocol
SNARE	SubNetwork Address Resolution Entity
SNCP	Single Node Control Point
SNDCF	SubNetwork Dependent Convergence Facility / SubNetwork Dependent Convergen
SNDCP	SubNetwork Dependent Convergence Protocol
SNERT	Snot-Nosed Egotistical Rude Teenager
SNET	Southern New England Telephone
SNG	Secured Network Gateway
SNI	Siemens Nixdorf Informationsysteme / Subscriber Network Interface
SNICF	SubNetwork Independent Convergence Facility
SNICP	SubNetwork Independent Convergence Protocol
SNMP	Simple Network Management Protocol
SNP	Sequence Number Protection
SNPA	SubNetwork Point of Attachment
SNPC	Software New Products Committee
SNR	Signal to Noise Radio
SNRM	Set Normal Response Mode
SNS	Satellite Navigation System
SO	Shift Out (ASCII) / Significant Other aka Spouse boyfriend/girlfriend) / System Option
SOA	Safe Operating Area
SOAC	Service Order Analysis Control
SOB	Do you really need *me* to explain this one? Well Son of a Female Dog
SOC	Service Oversight Center / Systems and Option Catalog
SOCC	Standard Optical Cable Code
SOCCA	Specification Of Coordinated and Cooperative Activities
SODIMM	Small Outline Dual Inline Memory Module
SO-DIMM	Small Outline Dual Inline Memory Module
SOE	Silly/Stupid Operator Error / Standard Operating Environment / Standards of Excellence
SOF	Save our Freeware
SOGITS	Senior Officials' Group for Information Technology Standardization
SOGT	Senior Officials' Group for Telecommunications
SOH	Section OverHead / Service Order History / Start Of Header / Start Of Heading (ASCII)
SOHO	Small Office Home Office
SO-J	Small Outline J-lead
SOL	Sh*t Outta Luck / Sons Of Liberty.
SOM	Start Of Message
SONAR	Service Order Negotiation And Retrieval
SONDS	Small Office Network Data System
SONET	Snychronous Optical NETwork
SOP	Standard Operating Procedure / Sum Of the Pieces / Same old stuff
SOS	Save our Shareware
SOSIG	Social Science Information Gateway
SOST	Special Operator Service Treatment
SOT	Short Of Time / (SoT) The Sea of Tranquility
SOTMG	Short Of Time Must Go
SP	Security Protocol / Service Provider / Sharp Private / Signal Processor / Signaling Point / Stack Pointer
SPA	Software Publishers Association
SPAG	Standards Promotion and Application Group
SPAM	SPiced hAM. Hormel's canned meat.
SPAN	Space Physics Analysis Network
SPARC	Scalable Performance Architecture
SPC	Southern Pacific Communications / Stored Program Control
SPCS	Stored Program Control Systems
SPCSS	Stored Program Control Switching System
SPD	Software Product Description
SPDA	Supplier Data Program
SPDL	Standard Page Description Language
SPDU	Session Protocol Data Unit
SPE	Synchronous Payload Envelope
SPEC	Standard Performance Evaluation Corporation
SPF	Shortest Path First
SPG	Software Product Group
SPH	Sets Per Hour
SPI	Safeguarding Proprietary Information / Self-Paced Instruction / Serial Peripheral Interface / Subsequent Protocol Identifier
SPID	Service Profile Identification / Service Protocol Identifier
SPKI	Simple Public Key Infrastructure
SPLaT	Society for the Preservation of Lasting Anarchy and Terrorism
SPM	Session Protocol Machine / Sheets Per Minute / Software Performance Monitor
SPMF	Servo Play Mode Function
SPN	Signal Processor Network
SPOOL	Simultaneous Peripheral Operation OnLine
SPP	Sequenced Packet Protocol / Ship Plan / Standard Parallel Port
SPS	Self Preservation Society / Software Product Services / Standby Power Supply
SPTS	Single Program Transport Stream
SPUC	Serial Peripheral Unit Controller
SPUC/DL	Serial Peripheral Unit Controller / Data Link
SPX	Sequenced Packet eXchange
SQD	Signal Quality Detector
SQE	Signal Quality Error
SQL	Structural Query Language
SQL/DS	Structured Query Language / Data System
SQL-DMO	Structured Query Language - Distributed Management Objects
SQM	Software Quality Management
SQUID	Super-conducting Quantum Interference Device
SR	Source Routing
SRA	Selective Routing Arrangement
SRAM	Static Random Access Memory
SRB	Source Route Bridging
SRC	Source (code) / System Resource Center
SRE	Scully Rational Explanation / Standards for Robot Exclusion
SREJ	Selective Reject
SRF	Specifically Routed Frame
SRG	Shareware Reference Guide / Strategic Relations Group
SRI	Stanford Research Institute
SRL	Singing Return Loss
SRT	Source Routing Transparent
SRTC	Service Right-to-Copy
SRTS	Synchronous Residual Time Stamp
SRUAPDU	Status Report User Agent Protocol Data Unit
SR-UAPDU	Status Report User Agent Protocol Data Unit
SS	(U.S.) Secret Service / Server-to-Server / Session Service / Signaling System / Socket Services / Special Services / Stack Segment / Standard System
SS/DD	Single - Sided Double Density
SS6	Signaling System 6
SS7	Signaling System 7
SSA	Serial Storage Architecture
SSAN	Social Security Account Number
SSAP	Session Service Access Point / Source Service Access Point
SSAS	Station Signaling and Announcement System/Subsystem
SSB	Single Side Band / Software Supply Business
SSBAM	Single-Side Band Amplitude Modulation
SSBSC	Single SideBand Suppressed Carrier
SSC	Special Services Carrier/Center
SSCF	Service Specific Coordination Function
SSCOP	Service Sepecified COnvergence Protocol / Service Specific Connection Oriented Protocol
SSCP	System/Subsystem Services Control Point / Service Specific Convergence Sublayer
SSD	Solid State Disk
SSDD	Same stuff different day
SSDU	Session Service Data Unit
SSEL	Session Selector
SSFD	Solid State Floppy Disk
SSG	Software Systems Group / Strategic Studies Group / Suburban Survival Guide
SSI	Small Scale Integration
SSL	Secure Sockets Layer (security protocol) / Standard Security Label
SSM	Single Segment Message
SSN	Social Security Number
SSN	Switched Service Network
SSO	Satellite Switching Office
SSODB	Secret Society Of Dark Birds
SSP	Service Switching Point / Switching Service Point / Sponsor Selective Pricing / System Status Panel
SSPA	Solid State Power Amplifier
SSPC	System Status Panel Controller
SSPI	Security Service Provider Interface
SSPRU	System Status Panel Relay Unit
SSS	Server Session Socket / Software Support Services / Strowger Switching System
SST	Single Sideband Transmitter
SSTDMA	Spacecraft Switched Time Division Multiple Access
SSTTSS	Space-Space-Time-Time-Space-Space Network
ST	Seagate Technology (as in ST506 and ST412 interfaces) / Segment Type / Start / Straight Tip
STA	Spanning Tree Algorithm
STANO	Surveillance Target Acquisition and Night Observation
STAR	Systems and Technology Applications Requirements
STB	Start of Text Block
STC	Serving Test Center / Switching and Testing Center / Switching Technical Center
STD	STandarD
STD	Subscriber Trunk Dialing
STDA	StreetTalk Directory Assistance
STDM	Statistical Time Division Multiplexing
STE	Section Terminating Equipment (SONET) / Signal Terminal Equipment / Spanning Tree Explorer
STEP	Software Test and Evaluation Panel
STF	Standard Transaction Format
STFU	Shut The Fu*k Up
STG	Strategic Technologies Group
STI	Single Tuned Interstage
STI/ST-TMP	Star Trek first movie/The Motion Picture
STII/ST-WOK	Star Trek second movie/'Wrath of Khan'
STIII/ST-SFS	Star Trek third movie/'Search for Spock'
STIV/ST-TVH	Star Trek fourth movie/'The Voyage Home'
STM	Scanning-Tunneling electron Microscope / Synchronous Transfer Mode
STMF	State Management Function
STMI	Synchronous Transport Module i (usually as STM-i)
STM-I	Synchronous Transport Module i (usually as STM-i)
STN	Super Twisted Nematic (material)
STOC	Symposium on the Theory Of Computing
Storage	Management Subsystem
STP	Shielded Twisted Pair / Shielded Twisted Pair / Signal Transfer Point / Signal Transfer Protocol
STR	Synchronous Transmit Receive
STS	Shared Tenant Service / Space-Time-Space Network / Synchronous Time Stamp / Synchronous Transport Signal
STS3C	Synchronous Transport System level 3 Concatenated (usually as STS-3c)
STT	Secure Transaction Technology
ST-TNG	Star Trek The Next Generation
ST-TOS	Star Trek The Original Series
STV/ST-TFF	Star Trek fifth movie/'The Final Frontier'
STVI/ST-TUC	Star Trek sixth movie/'The Undiscovered Country'
STX	Start of TeXt (ASCII)
SU	Service User
SUA	Stored Upstream Address
SUABORT	Session User Abort
SUB	Subaddressing
SUBLIB	SUBroutine LIBrary
SUE	Stupid User Error
SUFF	Suffix
SUM	Smart Uplink Module
SUN	Stanford University Networks
SUNet	Stanford University Network
SUP	What's up
SUT	System Under Test
SUV	Sport Utility Vehicle
SVC	(frame relay) Switched Virtual Channel / Switched Virtual Circuit
SVCI	Switched Virtual Circuit Identifier
SVD	Simultaneous Voice / Data
SVGA	Super Video Graphics Adapter
SVGA	Super Video Graphics Array
SVID	System V Interface Definition
SVN	Switched Virtual Network
SVP	Switched Virtual Path
SVPN	Secure Virtual Private Network
SVS	Switched Voice Service
SW	Shareware
SWAG	Scientific Wild A** Guess
SWAK	Sealed With A Kiss
SWAN	Satellite Wide Area Network / Secure Wide Area Network
SWaT	Special Warez Acquisition Team
SWB	SouthWestern Bell
SWC	Serving Wire Center
SWG	Special Working Group / Sub-Working Group / Standards Working Group
SWIFT	Society for Worldwide Interbank Financial Telecommunications
SWIM	Super Woz Integrated Machine
SWL	Screaming with Laughter
SWM	Semiconductor Worldwide Management
SWMBO	She Who Must Be Obeyed
SWMC	(DMTF) Support Management Working Committee
SWO	Standards Writing Organization
SWOA	Social Workers On Acid (usually as SWoA)
SWS	SoftWare Services
SX	Simplex (signaling)
SXS	Step-by-Step / Strowger Switch
SYC	SYstem Control / Synchronize (flag) / SYNchronous / idle (ASCII)
SYL	See you later
SYS	See You Soon / System
SYSCON	System Configuration
SYSEX	SYStem EXclusive (message)
SYSGEN	SYStem GENeration
SYSOP	SYStem Operator aka God
Sysop	Systems Operator; person who manages a Forum
S&NIJUG	Scottish and Northern Ireland Janet User Group
S	Shareable / Sleeve
S/MIME	Secure Multimedia Internet Mail Extensions
S/WAN	Secure Wide Area Network
S2MP	Scalable Shared memory MultiProcessor
SA	Assistant Scoutmaster / Selective Availability / Source Address / Storage Array / Study Administration
SAA	Service Aspects and Applications / Systems Application Architecture
SAAL	Signalling ATM Adaptation Layer
SABB	Storage Array Building Block
SABM	Set Asynchronous Balanced Mode
SABME	Set Asynchronous Balanced Mode Extended
SABRE	Semi-Automatic Business Research Environment
SAC	Service Area Code / Special Area Code / Service Area Computer / Simplified Access Control / Single Attachment Concentrator /
SACF	Single Association Control Function
SACK	Selective ACKnowledgment
SAF	Subnetwork Access Facility
SAFE	Security And Freedom through Encryption / Security Awareness From Education
SAFENET	Survivable Adaptable Fiberoptic Embedded Network
SAFTE	SCSI Accessed Fault-Tolerant Enclosure
SAF-TE	SCSI Accessed Fault-Tolerant Enclosure
SAG	SQL Access Group / Street Address Guide
SAGE	Semi-Automatic Ground Environment
SAI	Serving Area Interface
SAIL	Stanford Artificial Intelligence Lab
SAK	Selective AcKnowledgment
SALI	Standalone Automatic Location Identification/Information
SALSER	Scottish Academic Libraries Serials Project
SAM	Secure Access Multiport
SAMA	Step-by-step Automatic Message Accounting
SAMNET	(UK) Sub-Auroral Magnetometer Network
SAN	System Area Network / Storage Area Network
SAO	Single Association Object
SAP	Secondary or Separate Audio Program / Service Access Point / Service Advertising Protocol
SAPI	Service Access Point Identifier / Speech Application Programming Interface
SAR	Some Assembly Required / Segmentation And Reassembly / Store Address Register
SARC	Symantec Antivirus Research Center
SARF	Security Alarm Reporting Function
SARM	Set Asynchronous Response Mode
SARTS	Switched Access Remote Test System
SAS	Single Attachment Station/System / Special Access Surcharge / Statistically Assigned Sockets / SWITCH Access System / Switched Access Services
SASE	Self Addressed Stamped Envelope / Special Application Service Element / System And Support Engineering
SASFE	SEF/AIS Alarm Signal
SASI	Shugart Associates System Interface
SASO	Saudi Arabian Standards Organization
SAT	Special Access Termination / Supervisory Audio Tone
SATAN	Security Administrator Tool for Analyzing Networks
SATF	Security Audit Trail Function
SATNET	SATellite NETwork
SATS	Selected Abstract Test Suite
SAW	Surface Acoustic Wave
SBA	Shipping and Billing Authorization
SBB	System Building Block
SBC	Single Board Computer
SBCN	Sitting Behind the Computer Naked
SBCS	Single - Byte Character Set
SBD	silent but deadly (fart) [Beavis & Butthead] cos because
SBDN	Southern Bell Data Network
SBI	Storage Bus Interconnect
SBIR	Small Business Innovation Research (program)
SBIT	Startup Built In Test
SBL	Softbridge BASIC Language
SBMS	Southwestern Bell Mobile Service
S-BOX	Skunk Box
SBP	Serial Bus Protocol (sometimes as SBP-2)
SBR	Storage Business Review
SBS	Satellite Business Systems / Skyline Business Systems
SBT	Software Business Technologies
SC	Scanner Controller / Sectional Center / SubCommittee / Subscriber Connector
SCA	Short Code Address / Strategic Capital Acquisitions / Subsidiary Communication Authorization / Swiss Cracking Association
SCAI	Switch to Computer Application Interface
SCAM	SCSI Configured Auto-Magically
SCAT	Special Computerized Attack Team / Stromberg-Carlson Assistance Team
SCC	Satellite Communications Control / Specialized Common Carrier(s) / Standards Council of Canada / Switching Control Center
SCCP	Signaling Connection Control Part
SCCS	Specialized Common Carrier Service / Switching Control Center System
SCD	Software Chronical Digest
SCE	Service Creation Environment
SCF	Sectional Center Facility / Selective Call Forwarding
SCFM	Sub-Carrier Frequency Modulation
SCI	Scalable Coherent Interface / Strategic Computing Initiative
SCIT	Semi-Conductor and Interconnect Technologies
SCL	Switch to Computer Link
SCLM	Software Configuration and Library Manager
SCM	Software Configuration Management / Station Class Mark / Subscriber Carrier Module
SCMP	System Cooperative Marketing Program
SCNR	Sorry CouldN't Resist
SCNR	Sorry CouldN't Resist
SCO	SemiConductor Operations / Serving Central Office
SCONUL	Standing Council of National and University Libraries
SCOP	Standing Conference of Principals of Colleges
SCOT	Stepper Central Office Tester
SCOTS	Surveillance and Control Of Transmission System
SCP	Service/Signal/System Control Point / Signal Conversion Point / System Control Program
SCPAM	Simple Coded - Pulse Amplitude Modulation
SC-PAM	Simple Coded - Pulse Amplitude Modulation
SCPC	Single-Channel Per Carrier / Single-Channel Per Connection
SCPD	Supplementary Central Pulse Distributor
SCR	Selective Call Rejection / Silicon Control Rectifiers / Sustainable Cell Rate / Sustained Cell Rate / Satellite Communications Systems
SCS	Silicon Controlled Switches / SNA Character String / SWITCH Central System / System Communication Services / System Conformance Statement
SCSA	Signal Computing System Architecture
SCSI	System Can't See It / Small Computer Standard/System/Storage Interface
SCT	Screen Capture Text
SCTO	Soft Carrier Turn-Off
SCTR	System Conformance Test Report
SCU	Selector Control Unit
SCUSA	Standards Council of the United States of America
SCX	Specialized Communications eXchange
SD	(modem) Send Data / Start Delimiter
SD&D	Specific Development & Design
SDA	Security Domain Authority / Silicon Dream Artists / Software Design Automation
SDAP	Standard Document Application Profile
SDC	Software Distribution Center
SDE	Submission and Delivery Entity
SDF	Screen Definition Facility / Standard Data Format
SDH	Synchronous Digital Hierarchy
SDI	Standard Disk Interconnect / Standard Drive Interface / Strategic Defense Initiative / Supplier Declaration of Inter-operation
SDIF	SGML Document Interchange Format
SDIS	Switched Digital Integrated Service
SDK	Software Development Kit / Software Developer's Kit
SDL	Shielded Data Link / Specification and Description Language
SDL/GR	Specification and Description Language Graphical Representation
SDL/PR	Specification and Description Language Phrase Representation
SDLC	Synchronous Data Link Control
SDLGR	Specification and Description Language Graphical Representation
SDLP	Standard Device Level Protocol
SDLPR	Specification and Description Language Phrase Representation
SDM	Space Division Multiplexing / Shareware Distribution Network / Software Defined Network
SDNS	Secure Data Network System
SDSN	Secure Data System Network
SDO	Standards Development Organization
SDOC	Selective Dynamic Overload Controls
SDP	Service Delivery Point / Store Delivery Point
SDR	Store Data Register
SDRAM	Synchronous Dynamic Random Access Memory
SDRP	Source Demand Routing Protocol

S

SAAF              :- South Asian Accountants Federation

SAARC           :- South Asian Association for Regional  Cooperation

SADCC           :- South African Development Corporation Conference

SAFMA          :- South Asian Free Media Association

SAHR             :- South Asians for Human Rights

SAI                  :- Sports Authority of India

SAIL               :- Steel Authority of India Limited

SALT              :- Strategic Arms Limitation Tax

SAPTA           :- South Asian Preferential Trade Arrangement

SARS             :- Service Acute Respiratory Syndrome

SATO            :- South Atlantic Treaty Organization

SATTE           :- South Asian Travel and Tourism Exchange

SC                  :- Security Council / Supreme Court / Scheduled Caste

SCHIL            :- Stock Holding Corporation of India

SCI                  :- Shipping Corporation of India

SCL                 :- Space Corporation Limited

SCOPE           :- Standing Conference of Public Enterprises

SCRA             :- Special Class Railway Apprentice

SDK                :- System Development Kit OR Sun Development Kit

SDR                :- Special Drawing Rights

SEARCH        :- Society for Environmental Awareness and Rehabilitation of Child and       Handicapped

SEATO           :- South East Asia Treaty Organization

SEBI               :- Security Exchange Board of India

SEEPZ            :- Santacruz Electronic Export Processing Zone

SEO                :- Satellite for Earth Observation

SERC             :- Structural Engineering Research Centre

SETS             :- Society of Electronics Transaction and Security

SEWA            :- Self Employed Women's Association

SFALA           :- Small Farmers and Agricultural Labourers Agency

SFC                 :- Strategic Force Command

SGPC             :- Siromani Gurudwara Prabandhak Committee

SHAR            :- Shri Harikota Range

SAHMAT      :- Safdar Hashmi Memorial Trust

SIAM            :- Society of Indian Automobiles Manufacturers

SIDS             :- Sudden Infant Death Syndrome

SIDBI            :- Small Industries Development Bank of India

SITA              :- Separation of Immoral Traffic in Women and Girls Act

SIS                  :- Secret Intelligence Service

SIV                  :- Semen Immuno Deficiency Virus

SLAR              :- Sight Looking Environment Radar

SLBM             :- Submarine Launch Balistic Missile

SLV                 :- Satellite Launch Vehicle

SMART          :- Small Mission for Advance Research

SMS                :- Short Messaging System

SNIPES           :- Society of National Institutes for Physical Education and Sports

SPCA               :- Society for the Prevention of Cruelty to Animals

SROSS           :- Stretched Rohini Satellite Series

SSD                 :- Satellite System Division

SSN                 :- Social Security Number

SSTEP            :- Symphonic Satellite Telecommunication Experiment Project

STARS           :- Satellite Training and Ranging System

START           :- Strategic Armed Reduction Talks

STD                :- Subscribers Trunk Dialing OR Sexually Transmitted Disease

STEC             :- Solar Thermal Energy Centre

STEP              :- Satellite Telecommunication Experiment Project

STPI               :- Software Technology Park of India

SUNFED        :- Special United Nations Fund for Economic Development

SWAPO          :- South West African Peoples Organization

SWIFT            :- Short Work Programme in Information Technology