Si

Look up Si, si, SI, or Appendix:Variations of "si" in Wiktionary, the free dictionary.

Si, SI or si may refer to:

Arts and media

• Si (film), original title of the 2010 South Korean film Poetry
• Si, a self-replicating artifact in the computer game Ancient Domains of Mystery

Music

• Si (musical note), the seventh note in the traditional fixed do solfège
• "Sì" (song), the name of the Italian entry to the Eurovision Song Contest 1974
• "Sì", a 1985 song released by Italian actress Carmen Russo
• Sí (album), an album by Mexican singer and songwriter Julieta Venegas
• Sì (operetta), an operetta by the Italian composer Pietro Mascagni

Publications

• Si (novel), a 2014 novel by Bob Ong
• Sí (Peruvian magazine), a magazine notable for its anti-corruption reporting
• The Scots Independent, a Scottish nationalist newspaper
• Sports Illustrated, an American sports magazine

Organisations

• SÍ Sørvágur, a Faroese sports association
• Samahang Ilokano, a fraternity/sorority based in the Philippines
• Scouting Ireland, the national Scouting association of Ireland
• Societas Iesu, the Jesuits, a religious order of the Roman Catholic Church
• Sports Interactive, a British computer games development company
• Skynet Airlines (IATA airline code SI)
• Spokane International Railroad (reporting mark SI), a former railway in Washington, US

Education

• St. Ignatius College Preparatory, a Jesuit high school in San Francisco, California, US
• Seletar Institute, a defunct centralised institute in Singapore
• Silay Institute, a private college in the Philippines
• Smithsonian Institution, an American educational and research institute

Government

• Smithsonian Institution, an U.S. government educational and research institute
• Survey of India, an Indian government agency responsible for managing geographical information about India
• Swedish Institute (Svenska institutet), a Swedish government agency which promotes Sweden abroad
• Si, a South Korean administrative unit

Computing

• The SI, a former name of the American defense contractor Vencore
• Swiss Informatics Society, a Swiss organization of computer science educators, researchers, and professionals
• Silicon Image, a computer chip vendor

Politics

• Catalan Solidarity for Independence, a pro-independence Catalan political party
• Situationist International, a left-wing organisation
• Socialist International, a worldwide organization of democratic socialist and labour political parties
• Solidarity and Equality, an Argentine political party
• Survival International, a non-governmental indigenous rights organization

Places

• Mount Si, a mountain in the U.S. state of Washington
• Si County, county in Anhui, China
• Si River, a river in China
• Province of Siena (two letter provincial designator), an Italian province
• Slovenia (ISO 3166-2), a country
• Solomon Islands, a Pacific island nation
• Southern Ireland (1921–22), a former name for the Republic of Ireland
• Staten Island, a borough of New York City and an island in the Hudson River

Science and technology

• International System of Units (Système international d'unités), the modern international standard version of the metric system
• Silicon (Si), a chemical element
• Signal integrity, electronic circuit tools and techniques that ensure electrical signals are of sufficient quality
• Sine integral Si(x)
• si, a chemical descriptor; See Prochirality
• Superimposition, in sound recording

Biology and medicine

• Sacroiliac, an anatomical abbreviation for the sacroiliac (joint)
• Self-injury, intentional, direct injuring
• Sexual intercourse, a medical abbreviation
• Small intestine, part of the gastrointestinal tract
• Substantia innominata, part of the basal forebrain
• Suicidal ideation, a medical term for thoughts about suicide

Computing and Internet

• .si, the Internet country code top-level domain for Slovenia
• SI register, or source index, in X86 computer architecture
• 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
• Systems integrator, a type of company that specializes in integrating complex computer or data systems from multiple vendors

Vehicles

• Spark-ignition engine, a type of internal combustion engine
• Honda Civic Si, an automobile

Titles and ranks

• Si, a variant of the Thai honorific Sri
• Si, a Maghrebi Arabic variant of Sidi, a title of respect
• Sergeant instructor, an appointment in the British Army
• Sitara-i-Imtiaz, an honorary award for civilians and the military in Pakistan
• Station inspector, a rank in the Singapore Police Force
• Sub-inspector, a rank in Indian Police forces
• Superintendent (police), senior rank of British Police

Other uses

• Sì (dessert), traditional spherical dessert made by glutinous rice
• Si (surname), a Chinese surname
• Si Robertson (born 1948), cast member of Duck Dynasty and its spinoff Going Si-ral
• Sídhe or Si, Celtic mythological beings
• Simon (given name) (abbreviation)
• Simple interest, in finance
• Sinhalese language (ISO 639 alpha-2 code: si)
• Statutory Instrument, a form of delegated or secondary legislation in Great Britain
• Structural Integration, a form of alternative medicine
• Supplemental instruction, an academic support program often used in higher education

See also

• S1 (disambiguation)