si

Look up si, Si, SI, or sì in Wiktionary, the free dictionary.

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

Measurement, mathematics and science

• International System of Units (Système international d'unités), the modern international standard version of the metric system
• 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 sine integral in mathematics
• Survey of India, an Indian government agency responsible for managing geographical information about India
• Simple Interest (Mathematics)

Medicine

• Sacroiliac, an anatomical abbreviation for the sacroiliac (joint)
• Self-injury
• Sensory integration, the neurological process that organizes sensation from one's own body and the environment
  • Upper often referring to Primary somatosensory cortex
• Sexual intercourse, a medical abbreviation
• Suicidal ideation, a medical term for thoughts about suicide
• Structural Integration, a form of bodywork, coined by Dr Ida Rolf

Places

• Mount Si, a mountain in state of Washington
• Si County, county in Anhui, China
• Si River, a river in China
• Slovenia, a European nation (esp. internet domain suffix and two-letter abbreviation)
• Solomon Islands, a Pacific island nation
• South India, a region in India
• Southern Ireland, a former constituent country of the UK now officially known as the Republic of Ireland
• Staten Island, a borough of New York City and an island in the Hudson River
• Province of Siena, an Italian province (two letter provincial designator)

Language

• ISO 639 alpha-2 code for the Sinhalese language
• Si Thai: ศรี Sri

Computer science

• .si, the Internet country code top-level domain for Slovenia
• Systems integrator, an IT company that specializes in integrating complex computer or data systems from multiple vendors
• Shift In, a control code in the C0 control code set
• Swarm Intelligence, an artificial intelligence technique
• Synthetic intelligence, an alternate term for or form of artificial intelligence
• Silicon Image Inc., a chip vendor
• SI register, or source index, in X86 computer architecture

Education

• Saint Ignatius College Preparatory, a Jesuit college in the United States
• Samahang Ilokano, a fraternity/sorority based in the Philippines
• Seletar Institute, a defunct centralised institute in Singapore
• Silay Institute, Inc., a private college in the Philippines
• Smithsonian Institution, an American educational and research institute
• Supplemental Instruction, an academic support program often used in higher education

Gaming

• Si, a self-replicating artifact in the computer game Ancient Domains of Mystery
• The Elder Scrolls IV: Shivering Isles, an expansion pack for The Elder Scrolls IV: Oblivion
• Sports Interactive, a British computer games development company

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
• Sì (Carmen Russo song), the name of the 1985 song released by Italian actress Carmen Russo
• Sí (album), an album by Mexican singer and songwriter Julieta Venegas
• Si, another name for the Sídhe, Celtic mythological beings

Government and politics

• Catalan Solidarity for Independence, an independist Catalan political party
• Situationist International, a left-wing organisation
• Socialist International, a worldwide organization of democratic socialist and labour political parties
• Sub-Inspector, a rank in Indian Police forces
• Survival International, a non-governmental indigenous rights organization
• 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
• Sí or Solidarity and Equality, an Argentine political party
• Sitara-i-Imtiaz, an honorary award for civilians and the military in Pakistan
• Societas Iesu, the Jesuits, a religious order of the Roman Catholic Church

Sports

• SÍ Sørvágur, a Faroese sports association
• Sports Illustrated, an American sports magazine

Transportation

• IATA code for Skynet Airlines
• Reporting mark of Spokane International Railroad, a former railway in Washington, USA
• Spark-ignition engine
• Honda Civic Si

Miscellanea

• Sí (Peruvian magazine), a magazine notable for its anti-corruption reporting
• Si (surname) (姒), a Chinese surname used by kings in the Xia Dynasty
• Sergeant Instructor, an appointment in the British Army
• Scouting Ireland, the national Scouting association of Ireland
• System integrator, a person or company that specializes in integrating systems
• Superintendent (police), senior rank of British Police
• Poetry (film), a 2010 South Korean film with the original title Si (시)
• Short for the name Simon

See also

• S1 (disambiguation)

This disambiguation page lists articles associated with the same title. If an internal link led you here, you may wish to change the link to point directly to the intended article.