SIL, Sil and sil may refer to: Organizations Servis Industries Limited, Pakistan Smithsonian Institution Libraries SIL International, formerly Summer Institute of Linguistics Apex Silver Mines (former American Stock Exchange ticker symbol) Societas Internationalis Limnologiae, now International Society of Limnology Society for Individual Liberty Scooters India Limited Science and technology Solid immersion lens for microscope Standard Interchange Language, for information exchange between software Software-in-the-Loop, in software testing; see Association for Standardisation of Automation and Measuring Systems STIL or SIL, a human gene Surge impedance loading of electrical transmission lines Squamous intraepithelial lesion Safety Integrity Level of a safety function Speech Interference Level, an acoustical parameter SIL Open Font License Fiction Sil (Doctor Who), a villain in the TV series Sil, a character in the film Species Silvio Dante, a character in The Sopranos People Narasingha Sil (born 1937), historian Sil Campusano (born 1965), a former baseball player Sil Austin (1929–2001), American jazz saxophonist Sil, member of the Dutch rap-metal band Urban Dance Squad Silvy De Bie or Sil (born 1981), Belgian singer Sil, project name of Dutch house musician Olav Basoski (born 1968) Places Sil (river), Galicia, Spain Sile (river), Italy, also called Sil Sil (village), a small village on the northwestern part of Soledar, Ukraine. Transport South Island line, Hong Kong Other uses Tumulung Sisaala (ISO 639-3 language code), a language Silence-Lotto (UCI code), a bicycle racing team SIL code, a 3-letter language code used by SIL International sister-in-law See also Sill (disambiguation) Sils (disambiguation) CIL (disambiguation)