SD
Appearance
Look up sd in Wiktionary, the free dictionary.
SD may refer to:
Places
- South Dakota, United States postal abbreviation
- Sudan, ISO country code
- Sudan Airways, IATA airline designator
- San Diego, California
- San Diego County, California
In technology
- SanDisk, US-based multinational corporation which designs and markets flash memory card products
- SafeDisc, a CD/DVD copy protection solution by Macrovision Corporation
- Secure Digital card, flash memory card format used in portable device, including digital cameras and handheld computers
- Self Destruct, in some video games.
- Software Distributor, an HP-UX software package management system
- Standard-definition television
- SharpDevelop, a free and open source IDE for the C# Visual Basic .NET programming languages
In politics
- Sicherheitsdienst, Security Police, the intelligence service of the Nazi SS
- Sinistra Democratica, Italian political party.
- Social Democrats (Slovenia), a left-wing Slovenian political party
- Stronnictwo Demokratyczne, a defunct Polish party
- Swiss Democrats (Schweizer Demokraten) A right-wing - political party in Switzerland
Silenced, put after a gun name to indicate the presence of a *Silencer*
Government
In mathematics
- Standard deviation, statistics
- Significant digits, a method of expressing error in measurement
- Systems dynamics modeling
In Medicine
In Music
- Godin SD, a guitar manufactured by Godin Guitars, a Canadian guitar
Other
- Sales and Distribution, business
- Silver & Deming, a type of reduced-shank drill bit
- Sindhi language
- Suppressed, a suffix placed at the end of a firearm's model name to note it is fitted with a suppressor.
- Sustainable Development, Environmental, economic and social development that meets the needs of the present without compromising the needs of future generations
- Super deformed, an art style in which characters are drawn with short, stubby, highly exaggerated builds
- SmackDown!, an abbreviation for SmackDown! a WWE Friday night show
- Scooby Doo
- SD1 (further disambiguation)