K (disambiguation)

K, or k, is the eleventh letter of the English alphabet.

K may also refer to:

General uses

 * K (programming language), an array processing language developed by Arthur Whitney and commercialized by Kx Systems
 * K (cider), a British draft cider manufactured and distributed by the Gaymer Cider Company of Bath, England
 * K band (disambiguation)
 * K computer, a Japanese supercomputer
 * K-factor (disambiguation), several unrelated terms in physics, engineering, telecommunications and chess
 * Vitamin K, a group of vitamins that are needed to promote blood coagulation
 * Kappa (Κ) (Greek alphabet)
 * Ka (Cyrillic) (К) (Cyrillic alphabet)
 * Chrysler K platform, 1981–1995 car design used by Chrysler
 * Low-K, the dielectric constant in semiconductors, electronics, and physics
 * K–12 education, a designation for the sum of primary and secondary education, used mainly in North America
 * K, a prefix for North American call signs used by most broadcast stations in the US west of the Mississippi River
 * K College, in Tonbridge, Kent
 * Kellanova, an American food processing company (NYSE stock ticker K)

People

 * Adem K, Australian musician
 * Yasmin K., German singer
 * K (composer), Indian film composer
 * K (singer) (born 1983), Korean singer who works in Japan as a J-pop singer
 * K, deceased guitarist of Japanese visual kei band Moi dix Mois
 * Kiccha Sudeepa, Indian actor, commonly abbreviated as simply K
 * K, Japanese singer and dancer, member of &Team

Books

 * K (Minogue and Baker book), a photographic book by Kylie Minogue and William Baker
 * K, a 2011 novel by Bernardo Kucinski, Brazilian journalist and political scientist
 * K. (novel), a 1915 novel by Mary Roberts Rinehart
 * "K" Is for Killer, the eleventh novel in Sue Grafton's "Alphabet mystery" series, published in 1994

Films and TV

 * K (2002 film), directed by Shoja Azari, an Iranian American
 * K, a 1997 French film directed by Alexandre Arcady
 * K (TV series), a Japanese anime
 * K, the production code for the 1964 Doctor Who serial The Dalek Invasion of Earth

Characters

 * K, the protagonist of Franz Kafka's 1926 novel The Castle
 * K, a character in the manga and anime 'Gravitation'
 * K, the main character in the novel by the same name by Bernardo Kucinski
 * K, the main character in the TV series Robotto Keiji (Robot Detective)
 * K, Todd and Riley's adoptive superspy mother on the Disney program The Replacements
 * K, the protagonist played by John Abraham in No Smoking
 * K, a character in Natsume Soseki's novel Kokoro
 * K, a character in the visual novel Zero Escape: Virtue's Last Reward
 * K′, also known as "K Dash" or "K Prime", a King of Fighters character
 * Agent K, the character played by Tommy Lee Jones in Men in Black, Men in Black II, and Men in Black 3
 * Joseph K., the protagonist of Kafka's 1925 novel, The Trial
 * K, the main character in the 2017 film Blade Runner 2049
 * Dr. K, the character in Power Rangers RPM

Other

 * K, a constructed language invented by Robert Dessaix

In mathematics

 * $$K_n$$ and $$K_{m,n}$$, the complete and complete bipartite graph
 * K-theory, a branch of topology and algebra
 * $$\mathbb K$$, in blackboard bold, is a commonly used symbol for a field, as an abbreviation of the German Körper.
 * $K$, the complete elliptic integral of the first kind

In music

 * K., abbreviation for Ralph Kirkpatrick’s chronological catalogue of Domenico Scarlatti's keyboard sonatas
 * K., abbreviation for the Köchel catalogue, chronological catalogue of compositions by Wolfgang Amadeus Mozart
 * K Records, independent record company based in Olympia, Washington

Albums

 * K (album), 1996 album by Kula Shaker

Songs

 * "K", a song by Cul de Sac (band)
 * K, a song by the Japanese rock band Bump of Chicken
 * "K" (The Tutts song), 2006 song by The Tutts
 * "K", a song by The Hold Steady
 * "K.", a song from Cigarettes After Sex (album) by Cigarettes After Sex

In politics

 * K, the Keskustapuolue, the Centre Party (Finland)
 * K, Kommunistiska Partiet, the Communist Party (Sweden)
 * K, the politics and followers of former President of Argentina Néstor Kirchner (1950-2010)

As a symbol or abbreviation

 * k, from Latin kilo, for 1000 (number)
 * K, ketamine, a street abbreviation for a recreational drug
 * K, Kyocera's mobile phones in Japan
 * K, a strikeout in baseball scorekeeping
 * K, a contract in legal shorthand
 * k, a voiceless velar plosive in the International Phonetic Alphabet
 * K, key color (i.e., black) in the CMYK color model, especially for printing
 * k, abbreviation of okay, commonly used in instant messaging, or in S.M.S. messages
 * K, the construction point of a ski jumping hill
 * k, a shorthand for a knighthood in the British honours system
 * K, the ticker symbol on the New York Stock Exchange for the Kellogg Company
 * K, abbreviation of gridiron football position Kicker (also known as placekicker)

Unit

 * k, symbol of the kilo- prefix in the SI and other systems of unit that denotes multiples of 1000
 * K, kelvin, the SI unit of thermodynamic temperature
 * K (upper case), informal abbreviation for kibibyte or 1024 bytes (symbol: kiB or kB or KB)
 * k (lower case), informal abbreviation for kilobyte or 1000 bytes (symbol: kB)
 * k, informal abbreviation for kibibit (symbol: kb or kib or Kb or kbit or kibit or Kbit) 1024 bits
 * k, informal abbreviation for kilobit (symbol: kb or kbit) 1000 bits
 * k or K, abbreviation for kilometre (SI symbol: km) (especially in measured-distance sports, e.g. "10K run")
 * k or K, abbreviation for kilohm (symbol; kΩ), a measure of resistance in electronics

In the natural sciences

 * K, one-letter designation for the amino acid lysine
 * K, for carrying capacity of an environment
 * K carat (purity), measurement applied to gold
 * K, the Cretaceous geological period

In the physical sciences

 * Potassium, symbol K, a chemical element
 * k, angular wavenumber of a wave
 * k, wavevector of a wave
 * K, the symbol that represents a kaon in particle physics
 * k, the spring constant in Hooke's law relating deformation (strain) and force applied (stress) to a material body
 * k or k$B$, the Boltzmann constant, the physical constant relating energy and temperature at the particle level
 * $$\kappa$$ or K, relative static permittivity (dielectric constant)
 * ke, the Coulomb constant
 * K, equilibrium constant
 * k, thermal conductivity
 * k, the Gaussian gravitational constant
 * k, often used for some proportionality constant

Military and guns

 * Kilo, the military time zone code for UTC+10:00
 * Operation K, a Japanese World War II naval operation
 * The K Project, a series of five nuclear tests by the Soviet Union
 * Swedish K, a submachine gun
 * AK-47, an assault rifle

Transportation

 * K (Los Angeles Railway), defunct streetcar line in Los Angeles, California
 * K (Broadway Brooklyn Local), earlier KK, discontinued in 1976
 * K (Eighth Avenue Local), a defunct train service on the New York City Subway, which was known as the AA until 1985
 * K Ingleside (San Francisco Muni)
 * K Line (Los Angeles Metro)
 * Sakaisuji Line, a subway service operated by the Osaka Metro, labeled Osaka Metro Sakaisuji line symbol.svg
 * JRW kinki-K.svg, the official West Japan Railway Company service symbol for the Kishin Line.