From en.wikipedia.org:
[Si]
SI is the International System of Units.
SI, SI, or SI may also refer to:
[TOC right]
** Arts, entertainment, and media
*** Literature
- _Si_ (novel) , a 2014 novel by Bob Ong
- _Sí_ (Peruvian magazine) , a magazine notable for its anti-corruption reporting
- _Skeptical Inquirer_ , an American magazine covering topics on science and skepticism
- _Sports Illustrated_ , an American sports magazine
- _Soccer International_ , an Australian monthly magazine
*** Music
- _Sí_ (Julieta Venegas album) , released in 2003
- _Sì_ (Andrea Bocelli album) , released in 2018
- "Sí" (Martin Jensen song) , a 2015 song
- Si (musical note) , the seventh note in the traditional fixed do solfège
- _Sì_ (operetta) , an operetta by the Italian composer Pietro Mascagni
- "Sì" (Gigliola Cinquetti song) , the Italian entry to the Eurovision Song Contest 1974
- Si (Zaz song) , 2013
- _Sí_ , a 2013 Spanish album by Malú
- "Sì", a 1985 song released by Italian actress Carmen Russo
*** Other uses in arts, entertainment, and media
- _Si_ (film) , original title of the 2010 South Korean film _Poetry_
** Enterprises and organisations
*** Computing
- Swiss Informatics Society , a Swiss organization of computer science educators, researchers, and professionals
- The SI , a former name of the American defense contractor Vencore
*** Education
- St. Ignatius College Preparatory , a Jesuit high school in San Francisco, California, US
- Silay Institute , a private college in the Philippines
*** Government
- Si, a South Korean administrative unit
- Survey of India , an Indian government agency responsible for managing geographical information
- Swedish Institute ( _Svenska institutet_ ), a Swedish government agency which promotes Sweden abroad
*** Politics
- Sarekat Islam , a socio-political organization in Indonesia under Dutch colonial rule
- Catalan Solidarity for Independence , a Catalan political party
- Situationist International , an organization of social revolutionaries
- Socialist International , a worldwide organization of political parties
- Solidarity and Equality , an Argentine political party (Spanish: _Solidaridad e Igualdad_ )
*** Transportation
- Blue Islands (IATA airline code, SI)
- Skynet Airlines (IATA airline code SI, ceased operating 2004)
- Spokane International Railroad (reporting mark SI), a former railway in Washington, US
*** Other enterprises and organizations
- Samahang Ilokano , a fraternity/sorority based in the Philippines
- SÍ Sørvágur , a Faroese sports association
- Society of Indexers , a professional society based in the UK
- Sports Interactive , a British computer games development company
** People with the name
- Si (surname) , a Chinese surname
- Si (given name)
- Princess Si of Anding ,first daughter of Wu zetain
** Places
- Mount Si , a mountain in the U.S. state of Washington
- Si (ancient Seeia/Seia), northern Hauran (ancient Auranitis), Syria; archaeological site with Nabataean temples, necropolis
- Province of Siena (postal code and vehicle registration plate code)
- Si County , Anhui, China
- Si River , in China
- Slovenia 's ISO 3166-2 code
** Science and technology
*** Biology and healthcare
- Smithsonian Institution (SI is its international code)
- Sacroiliac , an anatomical abbreviation for the sacroiliac (joint)
- Self-injury , intentional, direct injuring
- Shock index , a measurement used to determine if a person is suffering shock
*** Chemistry
- si, a chemical descriptor; See prochirality
- Silicon , symbol Si, a chemical element
- Disulfur diiodide , empirical formula SI
*** Computing and Internet
<!--don't repeat Computing section name-->
- .si , the Internet country code top-level domain for Slovenia
- Shift In , an ASCII control character
- SI register , or source index, in X86 computer architecture
- Swarm intelligence , an artificial intelligence technique
- Synthetic intelligence , an alternate term for or a form of artificial intelligence
*** Medical
- Suicidal ideation , thoughts of suicide
- Self-injury , nonsuicidal injuring of the body
*** Motor vehicles
- Honda Civic Si , an automobile
- Spark-ignition engine , a type of internal combustion engine
*** Other uses in science and technology
- Signal integrity , electronic circuit tools and techniques that ensure electrical signals are of sufficient quality
- Sine integral , Si(x)
- Spectral interferometry , attosecond physics technique
** Titles and ranks
- Si, a Maghrebi Arabic variant of Sidi , a title of respect
- Si, a variant of the Thai honorific Sri
- Station inspector , a rank in the Singapore Police Force
- Sub-inspector , a rank in Indian Police forces
** Other uses
- Statutory instrument (UK) , abbreviated SI, the principal form in which delegated legislation is made in Great Britain
- Sì (dessert) , a Chinese dessert
- [ga] , [ga] , or [gd] , Celtic mythological beings
- si, the Sinhala language ISO 639 alpha-2 code
- Supplemental instruction , an academic support program often used in higher education
** See also
- S1 (disambiguation)
[Disambiguation]