SA
- sa — (s) Sanskrit language (ISO 639-1 code)
- SA
- (s) Sand (METAR Code)
- Saudi Arabia (ISO 3166 and FIPS 10-4 country code digram)
- (i) Sexaholics Anonymous
- (i) sine anno (Latin, “without year”)
- Situational awareness
- South Africa
- (i/s) South Australia (postal symbol)
- (i) Standards Australia
- Sturmabteilung (German, “Storm Detachment”, Nazi forerunner and rival of SS)
- 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
- SACLANT — (p) Supreme Allied Commander atLANTic
- SACLOS — (a) Semi-Automatic Command to Line of Sight
- SAD
- (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
- SAE
- (i) Society of Automotive Engineers
- Stamped addressed envelope
- SAFER — (a) Steel And Foam Energy Reduction
- SAFICT — (a) Software Agents as Facilitators of Interoperability in Collective Training
- sag — (s) Sango language (ISO 639-2 code)
- SAG — (i) Screen Actors Guild
- 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”)
- SANZAR — (a) South Africa, New Zealand, and Australia Rugby
- san
- (s) Sanskrit language (ISO 639-2 code)
- (a) Storage Area Network
- 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 Airline Systems
- 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)
- SAU — (s) Saudi Arabia (ISO 3166 trigram)
- SAVAK — (a) Sazamane Etelaat va Amniate Kechvar (Iranian “Security and Intelligence Service”)
- SAW
- (a) Squad Automatic Weapon
- Surface acoustic wave
- SAWE — (a) Society of Allied Weight Engineers
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