• Source: List of acronyms: S

This list contains acronyms, initialisms, and pseudo-blends that begin with the letter S.
For the purposes of this list:

acronym = an abbreviation pronounced as if it were a word, e.g., SARS = severe acute respiratory syndrome, pronounced to rhyme with cars
initialism = an abbreviation pronounced wholly or partly using the names of its constituent letters, e.g., CD = compact disc, pronounced cee dee
pseudo-blend = an abbreviation whose extra or omitted letters mean that it cannot stand as a true acronym, initialism, or portmanteau (a word formed by combining two or more words).
(a) = acronym, e.g.: SARS – (a) severe acute respiratory syndrome
(i) = initialism, e.g.: CD – (i) compact disc
(p) = pseudo-blend, e.g.: UNIFEM – (p) United Nations Development Fund for Women
(s) = symbol (none of the above, representing and pronounced as something else; for example: MHz – megahertz)
Some terms are spoken as either acronym or initialism, e.g., VoIP, pronounced both as voyp and V-O-I-P.
(Main list of acronyms)

S
(s) Siemens
South
Sulphur/Sulfur




S0–9


S followed by a number is used to denote various German and Austrian S-train lines.
S4C – (i) Sianel Pedwar Cymru (Welsh, "Channel Four Wales")
S3 - (i) Alternative to SSS (e.g. Amazon S3)




SA


sa – (s) Sanskrit language (ISO 639-1 code)
SA
(i) Salvation Army
(s) Sand (METAR Code)
Saudi Arabia (ISO 3166 and FIPS 10-4 country's code digram)
(i) Sexaholics Anonymous
Sexual assault
(i) sine anno (Latin, "without year")
Single Adult, a designation in the LDS Church for unmarried individuals 18 and older
Situational awareness
South Africa
(i/s) South Australia (postal symbol)
(i) Standards Australia
Sturmabteilung (German, "Storm Detachment", Nazi forerunner and rival of SS)
S.A. – designation for a corporation in many European countries; see article for meanings
SAA
(i) Saudi Arabian Airlines, former name of Saudia
Sex Addicts Anonymous
South African Airways
Southern Athletic Association
Standards Association of Australia, a former name of Standards Australia
SAAB – (a) Svenska Aeroplan AB (Swedish aircraft manufacturer; also refers to its former auto manufacturing arm)
SAAFR – (a/i) Standard use Army Aircraft Flight Route ("safer")
SAAMI – (a) Sporting Arms and Ammunition Manufacturers' Institute ("sammy")
SAARC – (i) South Asian Association for Regional Cooperation
SAB – (i) Soprano Alto Baritone
Sabena – (a) Société anonyme belge d'exploitation de la navigation aérienne (French for "Belgian Company for Exploiting Aerial Navigation", 1923–2001)
SABIC – (p) Saudi Basic Industries Corporation
SABR – (a) Society for American Baseball Research
SAC
(a) Standards Activity Committee (of SISO)
U.S. Strategic Air Command (1946–1992)
SACAT – (a) Semi Attended Customer Activated Terminal (Supermarket checkout)
SACEUR – (p) Supreme Allied Commander EURope
SACF - Semi Automatic Capsule Filler source
SACLANT – (p) Supreme Allied Commander atLANTic
SACLOS – (a) Semi-Automatic Command to Line of Sight
SAD
(s) Safford Regional Airport (IATA code)
(a) Seasonal Affective Disorder
Situational Awareness Display
SADD – (a) originally Students Against Drunk Driving, now Students Against Destructive Decisions (U.S. national school-related group)
SADL
(a) Situation Awareness Data Link ("saddle")
Structural Architecture Description Language
SADT - (i) Substance Abuse Day Treatment
SAE
(i) Society of Automotive Engineers
Stamped addressed envelope
SAFER – (a) Steel And Foam Energy Reduction
SAFETY – (a) Stopping Adults Facilitating the Exploitation of Today's Youth
SAFICT – (a) Software Agents as Facilitators of Interoperability in Collective Training
sag – (s) Sango language (ISO 639-2 code)
SAG
(a/i) Screen Actors Guild
Surface Action Group
SAG-AFTRA – (a) Screen Actors Guild–American Federation of Television and Radio Artists
SAGAT – (a) Situation Awareness Global Assessment Technique
SAGE – (a) Semi-Automatic Ground Environment (simulation)
SAHB – (a) Sensational Alex Harvey Band
SAIC – (i) Science Applications International Corporation
SALT
(a/i) Save A Life Today (SALT) Alert; Emergency Contact System
(a) Southern African Large Telescope
Strategic Arms Limitation Talks
SAM
(a) Sequential-Access Memory
Sociedad Aeronáutica de Medellín
Surface-to-Air Missile
Sambo – (p/a) Samooborona bez oruzhiya (Russian: "Самооборона без оружия", literally "self-defense without weapons")
SAML – (a) Security Assertion Markup Language ("sam-ell")
SANZAAR – (a) South Africa, New Zealand, Australia and Argentina Rugby
san
(s) Sanskrit language (ISO 639-2 code)
(a) Storage Area Network
SAO - (more than 20 alternatives)
SAR
(s) Saudi riyal (ISO 4217 currency code)
(a) Search And Rescue
Special Administrative Region
Synthetic Aperture Radar
SARA
(a) Southeastern Association for Research in Astronomy
Scientific Atlanta Resident Application
Scottish Amateur Rowing Association
Southern African Railway Association
State Administration for Religious Affairs
SARP – (a) Search And Rescue Processor
SARR – (i/a) Search And Rescue Repeater
SARS – (a) Severe Acute Respiratory Syndrome
SART
(a) Search and Rescue Transponder
Situational Awareness Rating Technique
SARU – (i) South African Rugby Union
SAS
(i) Scandinavian Airlines System
Second Avenue Subway
Situational Awareness System
Special Air Service
Studies, Analysis and Simulation
Side Angle Side
(a) Statistical Analysis System (original meaning; SAS Institute Inc. has evolved far beyond that scope)
SASE – (i) Self-Addressed Stamped Envelope
SASO – (a) Stability and Support Operations
SASOL – (p) Suid Afrikaanse Steenkool en Oli.e. (Afrikaans, "South African Coal and Oil")
SAT
(i) formerly Scholastic Aptitude Test and Scholastic Assessment Test; now known solely by the initials
Small Arms Trainer
SATB – (i) Soprano Alto Tenor bass
SATNAV – (p) Satellite Navigation (Increasingly common GPS based system in new vehicles)
SATs – (a) Standard Assessment Tasks and other similar terms describing tests used in English schools; see National Curriculum assessment#Terminology
SAU – (s) Saudi Arabia (ISO 3166 trigram)
SAVAK – (a) Sazamane Etelaat va Amniate Kechvar (Iranian "Security and Intelligence Service")
SAW
(i) ṣallā -llāhu ʿalayhī (wa-ʾālihī) wa-sallama (Arabic: صَلَّىٰ ٱللَّٰهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ, "God bless him [and his family] and grant him peace"), an honorific suffix within Islam for Muhammad
(a) Submerged arc welding
Squad Automatic Weapon
Surface acoustic wave
SAWE – (a) Society of Allied Weight Engineers
SAWS – (i) alternate form of the Islamic honorific suffix for Muhammad (see SAW)




SB


Sb – (s) Antimony (Latin Stibium)
SbA - Stibarsen, an alloy of antimony and arsenic
SB
(i) Sexy Bitch
Sexy Bastard
Sexy Boy (disambiguation)
(s) Solomon Islands (ISO 3166 digram)
(i) Special Warfare Boat Operator
SBA
(i) Santa Barbara Airport
Simulation-Based Acquisition
Small Business Administration
Sovereign Base Area
Student bar association
SBB – (i) German for the Swiss Federal Railways
SBC
(i) Sensotronic Brake Control
Single-Board Computer
Southern Baptist Convention
Sun Belt Conference (US college sports)
SBCCOM – (p) U.S. Army Soldier and Biological Chemical Command (disbanded 2003)
SBCS – (i) Single-Byte Character Set
SBCT – (i) Stryker Brigade Combat Team
SBD
(s) Solomon Islands dollar (ISO 4217 currency code)
Silent But Deadly
SBP
(i) Samahang Basketbol ng Pilipinas (Filipino, "Basketball Federation of the Philippines")
U.S. School Breakfast Program
Society of Business Practitioners
State Bank of Pakistan
SBS
(i) Special Boat Service
Special Broadcasting Service
Seoul Broadcasting System
SBW
(i) Sonny Bill Williams (New Zealand dual-code rugby player)




SC


sc – (s) Sardinian language (ISO 639-1 code)
Sc – (s) Scandium
SC
(s) Cruiser Submarine (US Navy hull classification) c Saint Kitts and Nevis (FIPS 10-4 country code; from Saint Christopher)
Seychelles (ISO 3166 digram)
South Carolina (postal symbol)
SCA
(i) Service Contract Act
Sexual Compulsives Anonymous
Society for Creative Anachronism
SCAP – (a) Supreme Commander Allied Powers (Allied occupation of Japan)
sccm – (s) Standard cubic centimetre per minute (unit of measurement of fluid flow)
sccs – (s) Standard cubic centimetre per second (unit of measurement of fluid flow)
scfh – (s) Standard cubic foot per hour (unit of measurement of fluid flow)
scfm – (s) Standard cubic foot per minute (unit of measurement of fluid flow)
scfs – (s) Standard cubic foot per second (unit of measurement of fluid flow)
SCG – (s) Serbia and Montenegro (ISO 3166 trigram; defunct since 2006)
SCHIMS – (i) Soldier Combat Helmet Identification Marking System
SCHIP – (a) State Children's Health Insurance Program (U.S.; often pronounced "ess-chip")
SciFi – Science Fiction
sCJD – (i) Sporadic Creutzfeldt–Jakob disease
SCM – (i) Surface Contamination Module
SCMODS – (s) State, County, Municipal Offender Data System
SCN – (p) Suprachiasmatic Nucleus
SCNT – (i) Somatic Cell Nuclear Transfer
SCO
(i) Santa Cruz Operation (initials later used by SCO Group)
(s) Scotland (FIFA trigram; not eligible for an ISO 3166 or IOC trigram)
(a) Shanghai Cooperation Organisation
SCOTUS – (a) Supreme Court of the United States
SCR – (s) Seychelles rupee (ISO 4217 currency code)
SCRAM – (a) Safety Control Rod Axe Man
SCS
(i) Scan Correlated Shift
Soil Conservation Service
SCSI
(a) Small Computer System Interface ("scuzzy")
(i) Strategic and Combat Studies Institute
SCT – (s) Scattered Sky (METAR Code)
SCTP – (i) Stream Control Transmission Protocol
Scuba – (a) Self Contained Underwater Breathing Apparatus
SCUF – Slow Continuous Ultrafiltration
SCUFN – (i) Sub-Committee on Undersea Feature Names (of GEBCO)




SD


sd – (s) Sindhi language (ISO 639-1 code)
SD
(i) Secure Digital (memory card format)
Sheriff's department
Smoke/Decontamination
(s) South Dakota (postal symbol)
Sudan (ISO 3166 digram)
SDC
(i) Shaft Driven Compressor
U.S. Army Strategic Defense Command (1985–1992)
SDG – (s) Sudanese pound (ISO 4217 currency code)
SDG – (i) Sum Dum Goy - greasy spoon chinese restaurant
SDH – (i) Synchronous Digital Hierarchy
SDHC – (i) Secure Digital High Capacity
SDI – see entry
SDN – (s) Sudan (ISO 3166 trigram)
SDO – (i) Scattered Disc Object
SDP – (i) Social Democratic Party (European politics)
SDR – (i) Strategic Defence Review
SDRAM – (i) Synchronous Dynamic Random-Access Memory ("ess-dee-ram")
SDS – (i) Students for a Democratic Society
SDSS – (i) Sloan Digital Sky Survey
SDXC – (p) Secure Digital eXtended Capacity




SE


se – (s) Northern Sami language (ISO 639-1 code)
Se – (s) Selenium
SE
(s) Seychelles (FIPS 10-4 country code)
(i) Societas Europaea (form of business organization in the EU)
South-east
(s) Sweden (ISO 3166 digram)
(i) Synthetic Environment
System Engineering
SEAD – (i) Suppression of Enemy Air Defence(s)
SEADI – (i) Senior Executioner of Approved Driving Instructors
SEAFDEC – (p) Southeast Asian Fisheries Development Center
SEAL – (p) SEa-Air-Land
SEAT – (a) Sociedad Española de Automóviles de Turismo (Spanish for "Spanish Touring Car Company")
SEATO – (a) Southeast Asia Treaty Organization
SeaWiFS – (p) Sea-Viewing Wide Field of View Sensor (satellite instrument)
SEC
(i) U.S. Securities and Exchange Commission
(p) Security
Southeastern Conference
SECaaS - (p) Security-as-a-Service
SECAM – (a) Séquentiel couleur à mémoire (French for "Colour Sequential with Memory"; TV standard, cf. NTSC, PAL)
SECDEF – (p) (U.S.) Secretary of Defense
SED – (i) CERDEC Software Engineering Directorate
SEDRIS – (a) Synthetic Environment Data Representation and Interchange Specification
SEE – (a) Small Emplacement Excavator
SEG – (i) Society of Exploration Geophysicists
SEG – (i) Special Escort Group
SEK – (s) Swedish krona (ISO 4217 currency code)
Selkent – (p) South East London & Kent Bus Company
SELT – (a) Single Ended Line Test (ing)
SEM
(i/a) Sensor Employment Manager
Switch to Email Mode, i.e. stop texting as it is more disruptive by making a sound or vibrating and email instead, for a given time
SEN
(s) Senegal (ISO 3166 trigram)
(i) Small Extension Node
SEP
(i) Somebody Else's Problem
Spherical Error Probable
System Enhancement Package
System Engineering Plan
SEPTA – (i) Southeastern Pennsylvania Rapid-Transit Authority
SERE – (i) Survival, Evasion, Resistance and Escape
SESSPE – (a) Submarine Escape and Surface Survival Personnel Equipment
SET – (p) Staphylococcal EnteroToxin
SETI – (a) Search for ExtraTerrestrial Intelligence
SETAC – (a) Society for Environmental Toxicology and Chemistry
SEU
(i) Single Event Upset (solid state physics)
Slightly Enriched Uranium
Special Evidence Unit




SF


SF
(s) Fleet Submarine (retired US Navy hull classification)
(i) San Francisco
Science fiction
(s) South Africa (FIPS 10-4 country code)
(i) Speculative fiction
Special Forces
SFA
(i) Sales force automation
Saturated fatty acid
Scottish Football Association
Stephen F. Austin (State University)
Sudan Football Association
SFE
(i) Supercritical fluid extraction
Sydney Futures Exchange
SFF – (i) Standard File Format
sf&f – (i) Science fiction & fantasy
SFIO
(i) French Section of the Workers' International (former party)
(i) Serious Fraud Investigation Office (India)
SFM – Switch to Facebook Mode, i.e. to message someone on Facebook instead of texting as it is less disruptive in the sense of the phone not making sound or vibrating, for a period of time
SFOB – (i) Special Forces Operations Base
SFOR – (p) UN Stabilisation Force (in Bosnia and Herzegovina)
SFU – (i) Simon Fraser University (Canada)




SG


sg – (s) Sango language (ISO 639-1 code)
Sg – (s) Seaborgium
SG
(s) Senegal (FIPS 10-4 country code)
Singapore (ISO 3166 digram)
Snow Grains (METAR Code)
(i) Study Group
SGC
(i) Server Gated Cryptography
(p) Stargate Command
SGD – (s) Singapore dollar (ISO 4217 currency code)
SGML – (i) Standard Generalized Markup Language
SGP – (s) Singapore (ISO 3166 trigram)
SGS
(s) South Georgia and the South Sandwich Islands (ISO 3166 trigram)
(i) Svalbard Ground Station (Landsat)
Société Générale de Surveillance




SH


SH
(s) Saint Helena (ISO 3166 digram)
(p) SONATRACH (Algerian petroleum company)
Shanghai
SHAC
(a) Stop Huntingdon Animal Cruelty
Student Health Action Coalition
SHAPE – (a) Supreme Headquarters Allied Powers Europe
SHF – (i) Super High Frequency
SHN – (s) Saint Helena (ISO 3166 trigram)
SHO – (a) Showtime (see also sho.com)
SHOALS – (a) Scanning Hydrographic Operational Airborne Lidar Survey
SHORAD – (p) Short Range Air Defence
SHORADEZ – (p) SHORAD Engagement Zone
SHP – (s) Saint Helena pound (ISO 4217 currency code)
SHRA – (s) Rain Showers (METAR Code)
SHSN – (s) Snow Showers (METAR Code)




SI


si – (s) Sinhala language (ISO 639-1 code)
Si – (s) Silicon
SI
(s) Slovenia (ISO 3166 and FIPS 10-4 country code digram)
(i) Socialist International
Sports Illustrated
Système International (French, International System of Units)
SIA – (s) Singapore Airlines (ICAO code)
SIA – (i) Survivors of Incest Anonymous
SIAM – (i) Society for Industrial and Applied Mathematics
SIC – (a) Standard Industrial Classification
SICS – (a/i) Swedish Institute of Computer Science
SIDS – (a) Sudden infant death syndrome
SIDU – (i) select, insert, delete, update. See Create, read, update and delete
SIF – (i) Selective Identification Feature
SIFF – (i) Successor IFF
SIG
(i) Schweizerische Industrie Gesellschaft (German, "Swiss Industry Company"). See also SIG Sauer, a firearms manufacturer spun off from the aforementioned company in 2000.
(p) .signature (UNIX shell/Internet standard file name)
(a/i) Special Interest Group
(a/i) Strasbourg Illkirch-Graffenstaden Basket (French basketball club)
SIGCAT – (a) Special Interest Group for CD-ROM Applications and Technology
SIGINT – (p) Signals Intelligence
SIGMET – (p) Significant Meteorological Information
SIIT
(i) Saskatchewan Indian Institute of Technologies (Canadian university)
Sirindhorn International Institute of Technology (Thai university)
Stateless IP/ICMP Translation algorithm
SIMAC – (a) Semantic Interaction with Music Audio Contents
SIMLAS – (p) Soldier Integrated Multipurpose Laser System
SIMM – (a) Single In-line Memory Module
SIMNET – (p) SIMulator NETwork, later SIMulation NETwork
SIMNET-D - (p) SIMNET-Developmental
SIMP – (a) Strongly Interacting Massive Particle
SIMPLE
(a) Satellite Interactive Multimedia Platform for Low-cost Earth stations
(p) Savings Incentive Match Plan for Employees (as used in SIMPLE IRA)
(a) Standard Interface for Multiple Platform Link Evaluation (NATO STANAG 5602)
sin – (s) Sinhala language (ISO 639-2 code)
SIN – (a) Social insurance number (Canada)
SINCGARS – (p) SINgle Channel Ground and Airborne Radio System
SIP
(i) Session Initiation Protocol
State Implementation Plan
System Improvement Program
Systematic investment plan
SIPP – (a) Self-Invested Personal Pension
Siri – (a) Speech Interpretation and Recognition Interface (Apple iOS software)
SIRI – (a) Service Interface for Real Time Information
SIRS — (a) Systemic inflammatory response syndrome
SiS – (i) Silicon Integrated Systems
SIS – (i) UK Secret Intelligence Service (also known as MI6)
SISO
(a) Simulation Interoperability Standards Organization
Society of Independent Show Organizers
SIW – (i) Simulation Interoperability Workshop
SIYSS – (i) Stockholm International Youth Science Seminar




SJ


SJ
(s) Svalbard and Jan Mayen (ISO 3166 digram)
(i) Societas Iesu (Latin: The Society of Jesus, the Jesuit order)
(i) Statens Järnvägar (Swedish State Railways)
SJA – (i) Staff Judge Advocate (military law)
SJC – (i) Supreme Judicial Court of Massachusetts (note: the highest court in the state of Maine is also called the Supreme Judicial Court)
SJM – (s) Svalbard and Jan Mayen (ISO 3166 trigram)
SJW – (i) Social Justice Warrior




SK


sk – (s) Slovak language (ISO 639-1 code)
SK
(s) Saskatchewan (postal symbol)
Slovakia (ISO 3166 digram)
SKC – (s) Clear Sky (METAR Code)
SKK – (s) Slovak koruna (ISO 4217 currency code)
SKM – (s) Sikkim (ISO 3166 trigram; obsolete 1975)
SKU - (i) Stock Keeping Unit




SL


sl – (s) Slovene language (ISO 639-1 code)
SL
(s) Sierra Leone (ISO 3166 and FIPS 10-4 country code digram)
(i) Start Line
SLA
(i) Service Level Agreement
Symbionese Liberation Army
SLAA – (i) Sex and Love Addicts Anonymous
SLAC – (a) Stanford Linear Accelerator Center
SLAN – (i) sine loco, anno, nomine (Latin, "without place, year, or name")
SLAP – (a) Saboted light armor penetrator (type of firearms ammunition)
SLAPP – (a) Strategic lawsuit against public participation
SLB – (s) Solomon Islands (ISO 3166 trigram)
SLBM – (i) Sea/Submarine-Launched Ballistic Missile
SLC – (i) Scan Line Corrector
SLE – (s) Sierra Leone (ISO 3166 trigram)
SLI/SLi
(i/s) Scan-Line Interleave
Scalable Link Interface
SLIT – (p) SubLingual ImmunoTherapy
slk – (s) Slovak language (ISO 639-2 code)
SLL – (s) Sierra Leone leone (ISO 4217 currency code)
SLO – (s) Slovenia (IOC trigram, but not FIFA or ISO 3166)
SLOC
(a) Sea Lines Of Communication
Source Lines Of Code
SLORC – (a) State Law and Order Restoration Council (of Burma)
SLP
(i) Sea Level Pressure
(i) Super Long Play
slph – (s) Standard litre per hour (air flow)
slpm – (s) Standard litre per minute (air flow)
slps – (s) Standard litre per second (air flow)
SLR – (i) Single-Lens Reflex (camera)
SLT
(i) Single Lens Translucent
(i) Speech and language therapist
(i) Solid Logic Technology (electronics)
Swing Landing Trainer (paratroops)
(i) Secondary lymphoid tissue
slv – (s) Slovenian language (ISO 639-2 code)
SLV – (s) El Salvador (ISO 3166 trigram)




SM


sm – (s) Samoan language (ISO 639-1 code)
Sm – (s) Samarium
SM
(i) Sado-Masochism
(s) San Marino (ISO 3166 and FIPS 10-4 country code digram)
(i) Soldier's Manual
(s) Submarine Minelayer (US Navy hull classification)
SMA – (i) Scan Mirror Assembly
SMART - many different meanings
SMASS – (a) Small Main-Belt Asteroid Spectroscopic Survey
SMCT – (i) Soldier's Manual of Common Tasks
SMD – (i) Surface Mount Device
SMDR – (i) Station Message Detail Recording
sme – (s) Northern Sami language (ISO 639-2 code)
SME
(i) Scan Mirror Electronics
Subject Matter Expert
SMG
(i) Sequential Motorsport Gearbox
SubMachine Gun
SMH – (a) Shaking My Head
SMil – (a) Sadomasochisterne i landet (Danish SM organisation)
SMIL – (a) Synchronized Multimedia Integration Language
smo – (s) Samoan language (ISO 639-2 code)
SMP – (i) Standard Military Pattern
SM&R – (i) Source, Maintenance, and Recoverability
SMR – (s) San Marino (ISO 3166 trigram)
SMS – many, including: Short message service; see entry
SMTP – (i) Simple Mail Transfer Protocol
SMU – (i) Southern Methodist University
SMX
many, including: (i) Server Macro Expansion
(p) Solaris MINIX
(p) Spatial multiplexing
(p) Sulfamethoxazole; see entry
SMZ
many, including: (i) Silver Mt. Zion
(p) Sulfamethazine
(p) Sulfamethoxazole; see entry




SN


sn – (s) Shona language (ISO 639-1 code)
Sn – (s) Tin (Latin Stannum)
SN
(s) Senegal (ISO 3166 digram)
Singapore (FIPS 10-4 country code)
Snow (METAR Code)
SuperNova
Screen Name
sna – (s) Shona language (ISO 639-2 code)
SNAFU – (a) "Situation Normal — All Fouled/Fucked Up"
SNAP – (p) Supernova/Acceleration Probe
SNCB – (i) Société nationale des chemins de fer de Belgique (French for "Belgian Railways National Society", NMBS in Dutch)
SNCF – (i) Société nationale des chemins de fer français (French for "French Railways National Society")
snd – (s) Sindhi language (ISO 639-2 code)
SND – (i) Standard Nomenclature Database
SNE – (i) Synthetic Natural Environment
SNES – Super Nintendo Entertainment System
SNÉTA – (a) Syndicat national pour l'étude des transports aériens (French for "Aerial transport Study National Syndicate", 1919–1923)
SNG – (i) Satellite News Gathering (television)
SNL
(i) Saturday Night Live (television)
(i) Società Navigazione del Lago di Lugano
SNM – (i) Special Nuclear Material
SNMP – (i) Simple Network Management Protocol
SNOBOL – (p) StriNg Oriented symBOlic Language
SNP – (i) Single-nucleotide polymorphism
SNR
(i) SuperNova Remnant
Signal-to-Noise Ratio
SNRI – (i) Serotonin-Norepinephrine Reuptake Inhibitor
SNS – (i) Spallation Neutron Source
SNU – (i) Solar Neutrino Unit




SO


so – (s) Somali language (ISO 639-1 code)
SO
(i) Shared Object (Unix)
Sheriff's Office
Significant other
(s) Somalia (ISO 3166 and FIPS 10-4 country code digram)
SOA
(a) service-oriented architecture
(a) Society of Actuaries
(i) State of the art
SOAP
(a) Simple Object Access Protocol
Supplemental Offer and Acceptance Program (U.S. medical residency matching)
SOB
(i) Son Of a Bitch
Same Old Bullshit
SOC – (a) Sector Operations Centre
Soccsksargen – (p) South Cotabato, Cotabato, Sultan Kudarat, Sarangani, General Santos (a region in the Philippines; pronounced "sock-sar-gen")
SOCOM – (p) (U.S.) Special Operations Command
SoCon – (p) Southern Conference (U.S. college sports)
SOD
(i/a) School Of Dentistry
Statement Of Difference(s)
Statement Of Direction
Statement Of Documentation
Statement Of Duty/Duties
SOE
(i) Secret Of Evermore
Special Operations Executive (WWII British organization)
State Of Emissions (EW)
SOF
(a/i) Special Operations Force(s)
Status of Forces
SOFIA – (a) Stratospheric Observatory For Infrared Astronomy
SOGAT
(a) Society of Graphical and Allied Trades
Former British printing union
SOHC – (i) Single-OverHead-Cam engine
SOHO – (p) Solar and Heliospheric Observatory
SOI
(i) Signal Operating Instruction
(i) Southern Oscillation Index
SOL – (i) Shit Out of Luck
SOLIS – (i) Synoptic Optical Long-term Investigations of the Sun
som – (s) Somali language (ISO 639-2 code)
SOM
(a) Simulation Object Model
(s) Somalia (ISO 3166 trigram)
Sonar – (p) SOund Navigation And Ranging
SOP
(i) Standing/Standard Operating Procedure
State of Play
SOR
(i) State Of Readiness
Statement Of Requirements
SOS
(s) Somali shilling (ISO 4217 currency code)
Save Our Souls
SOSTAR – (a) Stand-Off Surveillance and Target Acquisition Radar
sot – (s) Sotho language (ISO 639-2 code)
SOUTHAG – (p) Southern Army Group
SOUTHCOM – (p) (U.S.) Southern Command
SOV – (i) Single Occupant Vehicle
SOW – (i) Statement Of Work
SOWHAT – (p) RESNA Subcommittee on Wheelchairs and Transportation
SOX – (p) Sarbanes–Oxley Act




SP


Sp
(p) Special
Spring tide (nautical charts)
(i) sine prole (Latin, "without offspring")
SP
(i) Security Police
Self-Propelled
Shore Patrol
(s) Spain (FIPS 10-4 country code)
(i) Start Point
Strong Point
spa – (s) Spanish language (ISO 639-2 code)
SPA - Single Page Application
SPAAG – (a) Self-Propelled Anti-Aircraft Gun
SPAC - Saratoga Performing Arts Center
SPACECOM – (p) (U.S.) Space Command
SPAL – (a) Società Polisportiva Ars et Labor ("Art & Labor Sports Club", with the "SP" from Italian and "AL" from Latin), Italian football club
Spaser – (a) Surface plasmon amplification by stimulated emission of radiation
SPC – (i) Secretariat of the Pacific Community
SPCA - Society for the Prevention of Cruelty to Animals
SPCO – (i) Single-Pole Change Over
SPD
(i) Shimano Pedaling Dynamics
Sozialdemokratische Partei Deutschlands (Social Democratic Party of Germany)
SPDT – (i) Single-Pole Double-Throw
SPEAC – (a) Stop Primate Experiments at Cambridge (later became SPEAK)
SPECTRE – SPecial Executive for Counter-intelligence, Terrorism, Revenge and Extortion
S.P.E.A.R. - Spontaneous Protection Enabling Accelerated Response
SPEED – (a) Subsistence Preparation by Electronic Energy Diffusion (early military microwave oven)
SPIE – (i) originally the Society for Photo-Optical Instrumentation Engineers ("SPIE – The International Society for Optical Engineering" 1981–2007, "SPIE" since 2007)
SPL
(i) Scottish Premier League
Superior Parietal Lobule
Sound pressure level
SPM – (s) Saint Pierre and Miquelon (ISO 3166 trigram)
SPOD – (a/i) Sea Port of Debarkation
SPOE – (a/i) Sea Port of Embarkation
SPOT – (a) Satellite pour l'observation de la Terre (French, "Satellite for Earth Observation")
SPQR – (i) Senatus Populusque Romanus (Latin "The Senate and the People of Rome")
sps – (i) sine prole superstite (Latin, "without surviving issue")
SPS – (i) Standard Positioning Service (GPS)
SPST – (i) Single-Pole Single-Throw




SQ


sq – (s) Albanian language (ISO 639-1 code)
SQ – (i) Sound Quality
SQ – (i) Standard Quality
sqi – (s) Albanian language (ISO 639-2 code)
SQL – (i/a) Structured Query Language ("seek-well")
SQS - Amazon Simple Queue Service
SQUID – (p) Superconducting QUantum Interference Device
SQOR – (p) Succinate:Quinone OxidoReductase, enzyme superfamily including quinone-linked succinate dehydrogenase and fumarate reductase




SR


sr – (s) Serbian language (ISO 639-1 code)
Sr – (s) Strontium
SR
(i) Sound Reinforcement
Supply Route
(s) Suriname (ISO 3166 digram)
(i) Sveriges Radio (Swedish Radio Ltd)
SR – (i) Sustained release of a drug
SRAM
(p) Scott (King), Ray (Day), SAM (Patterson) — founders of bicycle component manufacturer SRAM Corporation
(p) Static Random Access Memory ("ess-ram")
SR-ATGW – (i) Short-Range Anti-Tank Guided Weapon
SRB – (i) Solid Rocket Booster
SRBM – (i) Short-Range Ballistic Missile (cf. IRBM, ICBM)
SRC – (i) Scheduled Removal Component
srd – (s) Sardinian language (ISO 639-2 code)
SRD
(i) Science Requirements Document
(s) Surinam dollar (ISO 4217 currency code)
SRE - (i) Site Reliability Engineer(ing)
SREL – (i) Savannah River Ecology Laboratory
SRG
(i) SACEUR Rover Group
Special Republican Guard
SRGW – (i) Short-Range Guided Weapon
SRL
(i) Savannah River Laboratory
Single Rocket Launcher
Survival Research Labs
SRM – (i) Specified Risk Material(s)
srp – (s) Serbian language (ISO 639-2 code)
SRS – (i) Savannah River Site
SRTP – (i) [Secure Real-time Transport Protocol]




SS


ss – (s) Swati language (ISO 639-1 code)
SS
(s) Sand Storm (METAR Code)
(p) Schutzstaffel (German, roughly "Protection Squadron"; Nazi elite Praetorian guard)
(i) U.S. Secret Service
Spanish Ship
Stainless steel
Stockholm Skins
(s) Submarine (US Navy hull classification)
(i) Super Sport
Surface-to-Surface (missile)
SSA
(s) Cargo Submarine (US Navy hull classification)
(i) Social Security Administration (U.S.)
Statistics South Africa
SSB – (a) Single-sideband modulation
SSB – (i) Sacramento Sustainable Business
SSBN – (s) Nuclear-Powered Ballistic Missile Submarine (US Navy hull classification)
SSC
(i) Safe, Sane, Consensual (SM phrase)
Secondary Somatosensory Cortex
Smaller-Scale Contingency
U.S. Army Soldiers System Center (Natick, Massachusetts)
Superconducting Super Collider
SSCCATAGAPP – Singles, Seniors, Childless Couples, And Teens And Gays Against Parasitic Parents (fictional organization from The Simpsons)
SSD
(i) Solid-state drive
(s) South Sudan (ISO 3166 trigram)
SSDC – (i) U.S. Space and Strategic Defense Command
SSDD
(i) Same Shit, Different Day
Single-Sided Double-Density (floppy disk)
SSE
(s) South South-East
(i) Streaming SIMD Extensions
SSG – (s) Guided Missile Submarine (retired US Navy hull classification)
SSGN – (s) Nuclear-Powered Guided Missile Submarine (US Navy hull classification)
SSH – (i) Saffir-Simpson Hurricane scale
SSK – (s) Hunter-Killer Submarine (retired US Navy hull classification)
SSKP – (i) Single-Shot Kill Probability
SSL – (i) Secure Sockets Layer
SSM – (i) Surface-to-Surface (Guided) Missile
SSN
(s) Nuclear-Powered Attack Submarine (US Navy hull classification)
(i) SIM Serial Number
Social Security Number (U.S.)
Socialist Solidarity Network
Subsystem number (SCCP, SS7)
SSNW – (i) Same Shit, New Wrapping
SSO – (s) Submarine Oiler (retired US Navy hull classification)
SSP – (s) Submarine Transport (retired US Navy hull classification)
SSR
(s) Radar Picket Submarine (retired US Navy hull classification)
(i) Solid State Recorder
SSRI
(i) Selective Serotonin Reuptake Inhibitor
Social Systems Research Institute
SSRN
(i) Social Science Research Network
(s) Nuclear-Powered Radar Picket Submarine (retired US Navy hull classification)
SSS
(i) Siding Spring Survey
Side Side Side (an acronym for remembering congruent triangles)
(i) Sigue Sigue Sputnik (band)
S/SSM – (i) Surface-to-Subsurface Missile
SST
(i) SuperSonic Transport
(s) Training Submarine (US Navy hull classification)
Saturated Suction Temperature (refrigeration cycles)
SSTO – (i) Single-Stage To Orbit
SSV – (i) Soft-Skinned Vehicle (i.e., unarmoured)
ssw – (s) Swati language (ISO 639-2 code)
SSW – (s) South South-West




ST


st – (s) Sotho language (ISO 639-1 code)
ST
(s) Saint Lucia (FIPS 10-4 country code)
São Tomé and Príncipe (ISO 3166 digram)
STA
(i) Scheduled Time of Arrival
Surveillance and Target Acquisition
STAG – (a) (U.S.) Strategy and Tactics Group
STAGE – (a) Scenario Toolkit And Generation Environment
STANAG – (p) (NATO) Standardisation Agreement
STAR
(a) Scientific and Technical Aerospace Reports (NASA)
Simulation of Tactical Alternative Responses
Special Threat Analysis and Recognition
STAT
(a) Signal Transducers and Activators of Transcription (cell biology)
Special Tertiary Admissions Test (Australia)
STB - Surface Transportation Board
STC – (i) Superior Temporal Cortex
S&TCD – (i) CERDEC Space and Terrestrial Communications Directorate
STD
(s) São Tomé and Príncipe dobra (ISO 4217 currency code)
(i) Sexually Transmitted Disease
STDM – (i) Statistical Time Division Multiplexing
STEM
(a) Scanning transmission electron microscopy
Science, technology, engineering, and mathematics
(p) Spatiaotemporal Epidemiological Modeler (IBM-developed software)
STENTOR – (p) Satellite de télécommunications pour expérimenter de nouvelles technologies en orbite (French, "Orbital New Technology Experimental Telecommunications Satellite")
STFU
(i) Southern Tenant Farmers Union
Stuff You
"Shut the fuck up!"
STH – Sonic the Hedgehog
STI
(i) Sexually Transmitted Infection
Subaru Tecnica International
STK – (i) Satellite Tool Kit
STM – (i) Short Term Memory
STOL – (i) Short Take-Off and Landing
STOVL – (i) Short Take-Off and Vertical Landing
STP
(s) São Tomé and Príncipe (ISO 3166 trigram)
(i) Standard Temperature and Pressure
STR – (i) Short Tandem Repeat (DNA analysis)
STRATCOM – (p) United States Strategic Command
STRICOM
(p) U.S. Army Simulation, Training & Instrumentation Command (1992–)
Strike Command (1962–1971)
STRIVE – (a) Synthetic Tactical Real-time Interactive Virtual Environment
STSM – (i) Senior Technical Staff Member
Stuka – (p) Sturzkampfflugzeug (German WWII dive bomber)




SU


su – (s) Sundanese language (ISO 639-1 code)
SU
(s) Soviet Union (ISO 3166 digram; obsolete 1992)
Sudan (FIPS 10-4 country code)
SUB – (i) Student Union Building
SuD – (a) Subject under Discussion
SUDC – Swedish United Dawah Center, a salafist Islamic organisation in Sweden
SUI
(a) Sonic user interface
(s) Switzerland (IOC and FIFA trigram, but not ISO 3166)
SUK – Start Up Kit
sun – (s) Sundanese language (ISO 639-2 code)
SUN – (s)
Soviet Union (ISO 3166 trigram; obsolete 1992)
Stanford University Network that led to Sun Microsystems
SUNY – (a) State University of New York (usually pronounced "sue-knee")
SUR – (s) Suriname (ISO 3166 trigram)
SURTASS – (p) Surveillance Towed Array Sensor System
SUSAT – (a) Sight Unit Small Arms, Trilux
SUV – (i) Sport Utility Vehicle




SV


sv – (s) Swedish language (ISO 639-1 code)
SV
(s) El Salvador (ISO 3166 digram)
(p) Sportverein (German for "Sport Association", as in Hamburger SV and SV Werder Bremen)
SVC – (i) Secondary Visual Cortex
SvD – (p) Svenska Dagbladet (Swedish newspaper)
SVD
(i) Singular Value Decomposition
Snaiperskaya Vintovka Dragunova (Снайперская винтовка Драгунова, Russian for "Dragunov Sniper Rifle")
SVG – (i) Scalable Vector Graphics
SVK – (s) Slovakia (ISO 3166 trigram)
SVM
(p) Stroboscopic effect Visibility Measure; a measure for assessing a type of temporal light artefacts
(i) Support Vector Machine (artificial intelligence)
SVN – (s) Slovenia (ISO 3166 and FIFA trigram)
SVO – (i) subject–verb–object
SVR – (i) Sluzhba Vneshney Razvedki (Служба Внешней Разведки, Russian for "Foreign Intelligence Service")




SW


sw – (s) Swahili language (ISO 639-1 code)
SW
(s) South-West ordinal direction
Sweden (FIPS 10-4 country code)
(a) Shortwave
Star Wars
swa – (s) Swahili language (ISO 639-2 code)
SWA
(i/a) Secure Web Access
South-West Asia
SWAC – (p) Southwestern Athletic Conference
SWAG
Scientific wild-ass guess, slang for a rough estimate based on expert experience
Sourceware Archive Group, a free collection of classified source code and sample programs written in Pascal
Sport Writers Association of Ghana, Sports Writers Association based in Ghana
Special Warfare Group, a former name used by the Naval Special Operations Command
"Supporters Without A Game", sport slang spun off from WAGs ("wives and girlfriends")
SWALK – (a) Sealed With A Loving Kiss
SWAN – (a) System for Wearable Audio Navigation
SWAP – (a) Surface Waters Acidification Programme
SWAPO – (a) South-West Africa People's Organisation
SWAT – (a) Special Weapons And Tactics
swe – (s) Swedish language (ISO 639-2 code)
SWE – (s) Sweden (ISO 3166 trigram)
SWF
(p) Shockwave Flash file ("swiff")
Single White Female
SWG
(i) Surface Warfare Group
Symbology Working Group
SWHR – (i) Society for Women's Health Research
SWIG – (a) Simplified Wrapper and Interface Generator
SWIR – (a/i) Short Wave InfraRed ("ss-why-are" or "swhirr")
SWLABR – (i) "She Was Like A Bearded Rainbow", a song by the band Cream
SWORD – (p) Subjective WORkload Dominance
SWORDS – (a) Special Weapons Observation Reconnaissance Detection System
SWOT – (a) Strengths, Weaknesses, Opportunities, Threats (mnemonic)
SWP
(i) Special Working Party ("swipp")
Systematic Westing Plan (a plan of periodic westing of shares or mutual funds worth a fixed amount of money)
Skill with prize (UK pub quiz machines — quality titles include: Pub Quiz, Quiz City, Frog in a Liquidizer, Who Wants To Win a Tenner?)
SWT – (i) Sea Water Tank
SWV – (i) Sisters With Voices (American female R&B vocal group)
SWZ – (s) Swaziland (ISO 3166 trigram)




SX


SX – (i) Sonic X
SXM
(s) Sint Maarten (ISO 3166 trigram)
(i) Stream X-Machine




SY


SY – (s) Syria (ISO 3166 and FIPS 10-4 country code digram)
SYC – (s) Seychelles (ISO 3166 trigram)
SYLK – Microsoft 'Symbolic Link' data file format
SYP – (s) Syrian pound (ISO 4217 currency code)
SYR – (s) Syria (ISO 3166 trigram)
Syriza – (p) Synaspismós Rizospastikís Aristerás (Greek Συνασπισμός Ριζοσπαστικής Αριστεράς, "Coalition of the Radical Left")
SysML – (p) System Modeling Language
Sysop – (p) System Operator




SZ


SZ
(s) Swaziland (ISO 3166 digram)
Switzerland (FIPS 10-4 country code)
SZL – (s) Swaziland lilangeni (ISO 4217 currency code)




References

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• Badan Intelijen Pusat
• Makedonia Utara
• Daftar istilah transportasi rel
• ADM-20 Quail
• Angkatan Laut Kerajaan Belanda
• Honeywell
• List of acronyms: S
• Lists of acronyms
• List of acronyms: A
• List of acronyms: 0–9
• List of U.S. Navy acronyms
• List of acronyms: B
• Glossary of military abbreviations
• List of acronyms: Y
• List of computing and IT abbreviations
• List of acronyms: C