SI

'Si', 'si', or 'SI' may refer to (all SI unless otherwise stated):
In 'language':

★ One of two Italian words:

★
★ ''sì'' (accented) for "yes"

★
★ ''si'' (unaccented), a pronoun

★ One of two Spanish words:

★
★ ''sí'' (accented) for "yes" or the reflexive pronoun.

★
★ ''si'' (unaccented) for "if".

★ ''şi'', a Romanian word for "and"

★ ''si'', a French word meaning "yes, on the contrary", "as," "however," "so" and "if"

★ ''Si'', the person focus-marker in the Chamorro language

★ Si, a shortening of the first name Simon

★ ISO 639 alpha-2 code for the Sinhalese language
In 'computer science':

★ .si, the Internet country code top-level domain for Slovenia

★ Service Information, a type of metadata packet in a MPEG-2/DVB stream

★ Shift In, a control code in the C0 control code set

★ Swarm Intelligence, an artificial intelligence technique

★ Synthetic Intelligence, a form of artificial intelligence
In 'education':

★ Samahang Ilokano, a fraternity/sorority based in the Philippines

★ Seletar Institute, a defunct centralised institute in Singapore

★ Smithsonian Institution, an American educational and research institute
In 'gaming':

★ Si, a self-replicating artifact in the roguelike game ''Ancient Domains of Mystery''

★ '', an expansion pack for ''The Elder Scrolls IV: Oblivion''

★ Sports Interactive, a British computer games development company
In 'mathematics and science':

★ Signal integrity, electronic circuit tools and techniques that ensure electrical signals are of sufficient quality for proper operation

★ Si, the chemical symbol for silicon

★ Si(x), the sinc function in mathematics

★ Si, the sine integral in mathematics

★ Survey of India, an Indian government agency responsible for managing geographical information about India

★ ''Système International d'Unités'' (International System of Units), the modern international standard version of the metric system
In 'medicine':

★ Self-injury

★ Sensory integration, the neurological process that organizes sensation from one's own body and the environment

★ Sexual intercourse, a medical abbreviation

★ Suicidal ideation, a medical term for thoughts about suicide
In 'music':

★ Si, the original name of the seventh note of solfege, later changed to "Ti"

★ Sì (song), the name of the Italian entry to the Eurovision Song Contest 1974

★ ''Sí'' (Julieta Venegas), an album by Mexican singer and songwriter Julieta Venegas
In 'mythology':

★ Si, the lunar deity in Mahican mythology

★ Si, another name for the Sídhe, Celtic mythological beings
In 'government and politics':

★ Situationist International, a left-wing organisation

★ Socialist International, a worldwide organisation of social democratic, labour, and democratic socialist political parties

★ Station Inspector, the highest non-commissioned rank in the Singapore Police Force

★ Statutory Instrument, a form of delegated or secondary legislation in Great Britain

★ Swedish Institute (''Svenska institutet''), a Swedish government agency which promotes Sweden abroad
In 'sports':

★ SÍ Sørvágur, a Faroese sports association

★ ''Sports Illustrated'', an American sports magazine
In 'transportation':

★ IATA code for Skynet Airlines

★ Reporting mark of Spokane International Railroad, a former railway in Washington, USA

★ Si, a designation used by motor manufacturers to denote high-performance variants of car models
'Other':

★ Sergeant Instructor, an appointment in the British Army

★ Scouting Ireland, the national Scouting association of Ireland

★ Staten Island, a borough of New York City and an island in the Hudson River

★ System integrator, a person or company that specialises in integrating systems

★ Solomon Islands, a Pacific island nation

Contents

See also

See also

★ S1