SD

SD may refer to:

• Salvia Divinorum
• Southern Cross Decoration (SD), a South African military award
• Stage directions
• Sisters of the Destitute, a Syro-Malabar Catholic women's order
• Spasmodic dysphonia
• Super deformed, a specific style of Japanese caricature
• Sindhi language's ISO 639-1 code
• Subdivision in North American rail terminology
• Sudan's ISO country code
• Sudan Airways' IATA airline designator
• Sekolah Dasar, an Indonesian junior school
• Sustainable development

Organizations

• Sicherheitsdienst, the intelligence service of the Nazi SS
• Sinistra Democratica or Democratic Left, an Italian political party
• Social Democrats (Slovenia), a left-wing Slovenian political party
• Stronnictwo Demokratyczne, a defunct Polish party
• Swiss Democrats or Schweizer Demokraten, a right-wing political party in Switzerland
• Swedish Democrats, a nationalist party in Sweden
• Stardoll, a girl dressing up website

Places

• San Diego, the second largest city in California
• South Dakota United States postal abbreviation

Science and technology

• SD video or standard-definition television
• Secure Digital (SD), a flash memory card format
• 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
• Sympathetic detonation
• System dynamics, a type of system modelling involving feedback loops and stocks and flows

See also

• SD1 (disambiguation)
• MP5SD