KS

KS and variants may refer to:

Businesses and organizations

Kampfschwimmer, a German postwar commando frogman force
Kommandittselskap, a Norwegian type of company
Norwegian Association of Local and Regional Authorities
Keenspot, a webcomics/webtoons portal founded in March 2000 by cartoonist Chris Crosby
KS, IATA code of AirConnect a.k.a. Aeroitalia Regional [de], a Romanian airline
KS, then-IATA code of PenAir, Peninsula Airways, a defunct airline based in Anchorage, Alaska, US

Kashmiri language, a Dardic language of Kashmir (ISO 639 alpha-2 language code "ks")
Kernowek Standard, an orthography for Revived Cornish
Kiasu, Hokkien (a Chinese spoken variant) word for 'extreme fear of losing' (怕输)
Sound of the Latin letter X in many languages

Kaposi's sarcoma, a tumor caused by Human herpesvirus 8 (HHV8)
Kartagener syndrome, a genetic disorder
Kallmann syndrome, a genetic disorder preventing the start or completion of puberty
Keratan sulfate, any of several sulfated glycosaminoglycans
Kernel streaming, a method of processing streamed data
Ketoacyl synthase, a domain of polyketide synthases with a thiol group on a cysteine side-chain
kilosample (kS), 1000 samples of a digitized signal
Kilosecond (ks), 1000 seconds (16 minutes, 40 seconds)
Klinefelter's Syndrome, caused by a chromosome aneuploidy
Kolmogorov–Smirnov test, a goodness-of-fit test for probability distributions

Katawa Shoujo, a 2012 visual novel
Kammersänger, a German honorary title for a distinguished opera singer
Kaplan–Sheinwold, a contract bridge bidding system
Key Stage, a term used in the British education system
Kill stealing, a practice in online games
King's Scholar, at a UK public school (here meaning a kind of private school)
King's Serjeant, an obsolete UK legal post
Kirk/Spock or K/S, slash fiction
Kashmiri Wikipedia, Wikipedia in Kashmiri-language
Strikeouts, in baseball
Contracts, in legal shorthand
Slovak koruna, the currency of Slovakia 1993–2008 and of the 1939–1945 Slovak State