SD

SD may refer to:

• Salvia Divinorum
• Southern Cross Decoration (SD), a South African military award
• Sisters of the Destitute, a Syro-Malabar Catholic women's order
• Spasmodic dysphonia
• Sindhi language's ISO 639-1 code
• Sudan Airways' IATA airline designator
• Sekolah Dasar, an Indonesian junior school
• Sleeping Dogs, a 2012 video game

Organizations

• [Sicherheitsdienst] Error: {{Lang}}: text has italic markup (help), the intelligence service of the Nazi SS
• [Sinistra Democratica] Error: {{Lang}}: text has italic markup (help) or Democratic Left, an Italian political party
• Social Democrats (Slovenia), a left-wing Slovenian political party
• [Stronnictwo Demokratyczne] Error: {{Lang}}: text has italic markup (help), Democratic Party, a defunct Polish party
• Swiss Democrats or [Schweizer Demokraten] Error: {{Lang}}: text has italic markup (help), a right-wing political party in Switzerland
• Sweden Democrats, a nationalist party in Sweden

Places

• South Dakota United States postal abbreviation
• Sudan's ISO country code

Science and technology

• SD video or standard-definition television
• Secure Digital (SD), a flash memory card format
• Sega Dreamcast, a video game console by Sega
• Single domain (magnetic), a uniformly magnetized state
• Software Distributor, an HP-UX software package management system
• Splash Damage, a British game developing firm
• Standard deviation, a mathematical statistical measure
• Subdwarf star, a star with luminosity 1.5 to 2 magnitudes lower than that of a main-sequence star of the same spectral type

See also

• SD1 (disambiguation)
• MP5SD