SD

SD is an abbreviation for:

South Dakota , US state (postal abbreviation)
Sudan , country code according to ISO 3166-1
Super Deformed , a special form of Japanese caricature

History and Politics:

Rifle Division , a military formation
Swiss Democrats , a Swiss party
His Highness (SD), a title of nobility
Security service of the Reichsführer SS
Socialni Demokratiei , a Slovenian party
Sverigedemokraterna , a Swedish party

Science and technology:

Sales & Distribution , business term for sales
Cutting diamond , see cutting material

Fast printer , see line printer

Sound insulation , a measure of the sound insulation of doors and windows, for example

Thyroid , an organ in the human body

SD (Car Brand) , former British car brand

Secure Digital Memory Card , a storage medium, see SD card

Service desk , an organizational form of IT support

Shine-Dalgarno sequence , a sequence of mRNA in prokaryotes

Signal degraded , see bit error frequency of a transmission path or storage medium

Single density , see storage density of a floppy disk

Spiral dynamics , a three-dimensional movement concept in medicine

Standard Definition , standard definition digital television signal Standard Definition Television (SDTV) - as opposed to High Definition Television (HDTV)

Standard deviation , a measure of dispersion in statistics, see standard deviation

Structured design , a method in software development

People and groups:

Satan's Disciples , an American street gang
Sebald Dirleder, mintmaster's mark of the Dresden Mint (1635–1640)
Pseudonym of Stefan Duschl , German rapper, known today as SDiddy

Distinguishing signs on license plates:

Great Britain: Glasgow
Moldova: Șoldăneşti Rajon
Norway: Haugesund in the province of Rogaland
Austria:
- Schärding district
- Diplomatic corps in Salzburg
Poland: independent city of Dąbrowa Górnicza
Serbia: Smederevo

sd or .sd stands for:

.sd , top-level domain of Sudan
senile dementia = old age dementia
Sindhi , Asian language according to the language code of ISO 639-1

See also:

Wiktionary: SD - explanations of meanings, word origins, synonyms, translations