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SA

SA or sa may stand for:

• arsine, a toxic gas
• the ancient Egyptian hieroglyph meaning "protection" (see sa (hieroglyph))
• Salvation Army
• samarium, until the 1920s, when the symbol Sm became universal
• San Antonio
• Saudi Arabia (ISO 3166-1 alpha-2 country code)
• Seaman Apprentice
• Second Age of J. R. R. Tolkien's Middle-earth (usually written S.A.)
• selective availability, the mechanism for deliberately degrading the precision of the civilian GPS network
• Sexaholics Anonymous, a 12-step program
• sine anno, used in bibliographies to indicate that a publication date is unknown
• social anxiety (also known as "social phobia" or "social anxiety disorder")
• Socialist Alliance
• Sociedad Anónima (Spanish), see S.A. (corporation)
• Société Anonyme (French), see S.A. (corporation)
• Something Awful, comedy/satire website
• South Africa
• South America
• South Australia
• structured analysis (software engineering)
• Sturmabteilung (SA, Storm Troopers as in Nazi Germany)
• surface-to-air missile
• system administrator (computer industry)
• Software Assurance