# X (disambiguation)

X is the 24th letter of the English alphabet.
X may also refer to:

## Art, entertainment, and media
### Fictional entities

* X (Dark Horse Comics), a character and its namesake series
* X (Mega Man), protagonist of the Mega Man X video game series
* X (The X-Files), a television series character
* Radio X, the fictional radio station broadcasting the Grand Theft Auto: San Andreas soundtrack
* X, a symbol used on treasure maps in fiction to show the location of the hidden treasure
* X Parasite, an element of the 2002 game Metroid Fusion

### Film

* X (1963 film), subtitled The Man with the X-Ray Eyes, an American science fiction film
* X (1986 film), a Norwegian drama directed by Oddvar Einarson
* X (1996 film), an anime film directed by Rintaro, based on the X manga by CLAMP
* X (2022 film), an American horror film directed by Ti West
* X the Unknown, a 1956 British science fiction horror film
* X, alternate title for Malcolm X (1992 film), by Spike Lee
* X: Night of Vengeance, a 2011 thriller by Australian director Jon Hewitt
* X: Past Is Present, a 2015 Indian anthology film
* X rating, a designation for adult-only films

### Television

* Kamen Rider X, a Japanese series in the Kamen Rider franchise
* Ultraman X, a 2015 Japanese tokusatsu series
* The X (TV series), a Canadian children's program
* WXSP-CD, a Grand Rapids, Michigan TV station branded as "The X"
* X (TV series), a Japanese anime series based on the X manga by CLAMP
* X, the production code for the 1966 Doctor Who serial The Ark

### Video games

* X (1992 video game) a 3D game for the Nintendo Game Boy console
* X (game series), a science fiction space simulator series by Egosoft
* X (Xbox show), an annual trade show hosted by Microsoft

### Literature

* X (Cage book), by avant garde composer John Cage
* X (magazine), a quarterly review of literature and the arts
* X (manga), a 1992 Japanese manga by CLAMP
* X (Grafton novel), 2015, by Sue Grafton
* X (young adult novel), 2015, by Ilyasah Shabazz and Kekla Magoon
* X: A Fabulous Child's Story, a 1972 short story and 1978 picture book by Lois Gould
* X: Or, Betty Shabazz v. The Nation, a 2017 play by Marcus Gardley
* The 'X' Documents, a 1974 collection of British reports on German opposition to Hitler based on meetings with Carl Friedrich Goerdeler
* 'X' Stands for Unknown, a 1984 collection of science essays by Isaac Asimov

### Music
#### Bands

* X (American band), a punk band
* X (Australian band), a punk band
* X Japan, Japanese metal band, originally named X from 1982–1992
* X:IN, multinational girl group based in South Korea

#### Albums

* X (Agnez Mo album), 2017
* X (Klaus Schulze album), 1978
* X (Gnags album), 1983
* X (INXS album), 1990
* X (K-Ci & JoJo album), 2000
* X (Def Leppard album), 2002
* X (Anna Vissi album), 2002
* X (Kristeen Young album), 2004
* X the album, a Christian compilation album series starting in 2004
* X (Liberty X album), 2005
* X (Intocable album), 2005
* X (Fourplay album), 2006
* X (Kylie Minogue album), 2007
* X (Trace Adkins album), 2008
* X (Spock's Beard album), 2010
* X (Royal Hunt album), 2010
* X (Roll Deep album), 2012
* X (The 69 Eyes album), 2012
* X (Chris Brown album), 2014
* X (Ed Sheeran album) (read as "Multiply"), 2014
* X (The Driver Era album), 2019
* X (Ken Carson album), 2022
* X (Lucki mixtape), 2015
* X (mixtape), by pH-1, 2020
* X, a Philippine hip-hop album by Ex Battalion
* X (Nonpoint album), 2018
* X: The Godless Void and Other Stories, 2020, by ...And You Will Know Us by the Trail of Dead
* Ten (Sault album), (also styled X) 2022

#### Operas

* X, The Life and Times of Malcolm X, 1986

#### Songs

* "X" (21 Savage and Metro Boomin song)
* "X" (Chris Brown song)
* "X" (Jonas Brothers and Karol G song)
* "X" (Liberty X song)
* "X" (Nicky Jam and J Balvin song)
* "X" (Poppy song)
* "X" (Xzibit song)
* "X" (Arca song)
* "X", a song from the album The Circle by B'z
* "X", a song from the album Neysluvara by Hatari
* "X", a song from the album Undeniable by Hellyeah
* "X", a song from the album Pain Is Love by Ja Rule featuring Missy Elliott and Tweet
* "X", a song from the album Future History by Jason Derulo
* "X", a song from the album Luv Is Rage 2 by Lil Uzi Vert
* "X", a song from the album The Magic Position by Patrick Wolf
* "X", a song from the album Angels & Demons by Peter Andre
* "X", a song from the album Black Panther by ScHoolboy Q, 2 Chainz, Saudi, and Kendrick Lamar
* "X", a song from the album Toxicity by System of a Down
* "X", a song from the album Blue Blood by X Japan
* "X", a song from the album In the Court of the Dragon by Trivium
* "X", a song from the album X by Ken Carson

#### Stations

* KHTI, formerly KCXX, known as "The 'X' at 103.9 FM", a Southern California rock n' roll radio station
* KXZZ (FM), formerly known as "The 'X' at 100.1 FM", a rock n' roll radio station in Reno, Nevada
* WNFZ, formerly known as "94.3 the X", a modern rock radio station in Knoxville, Tennessee
* WQXA-FM, also known as 105.7 "The 'X'", a modern rock radio station in Harrisburg, Pennsylvania
* WXDX-FM, also known as "The 'X' at 105.9", a modern rock radio station in Pittsburgh, Pennsylvania
* WXLV (FM), former call sign branded as "90.3 "The X"", a college radio station in Allentown, Pennsylvania
* WXNY-FM, known as "La X 96.3", a Spanish radio station in New York City
* WZDA, formerly known as "103.9 The 'X'", a modern rock radio station in Dayton, Ohio
* XETRA-FM/91.1 MHz, licensed to Tijuana, using the moniker "91X".
* Radio X, a British radio station which grew out of the former XFM

### Roller coasters

* X2 (roller coaster), at Six Flags Magic Mountain, formerly known as X
* The Walking Dead: The Ride in Thorpe Park, England, formerly known as X

## Companies

* X Development, Google's in-house incubator established in 2010
* X Corp., the parent company of the social network X
* X.com (bank), the predecessor to PayPal
* X, the stock symbol for United States Steel Corporation

## Other organizations

* X (demo party), a Dutch demoscene party which started in 1995
* Organization X, a resistance organization active during the Axis occupation of Greece and the Greek Civil War
* The X, nickname for École Polytechnique, a French engineering school
* X University, informal interim name of Toronto Metropolitan University, formerly Ryerson University
* x:talk, London-based cooperative network project to support migrant sex workers

## Language script and phonetic

* X, a typographical approximation the Greek letter chi (Χ)
* Kha (Cyrillic), a letter of the Cyrillic script
* x, used in the International Phonetic Alphabet for the voiceless velar fricative
* ꭓ, used in the International Phonetic Alphabet for the voiceless uvular fricative

## People
### In arts and entertainment

* Director X (born 1975), Canadian music video director, also known as X and Little X
* Princess X (musician), former stage name of musician Liza Fox (active since 2010)
* XXXTentacion (1998–2018), American rapper commonly referred to as "X"
* DMX (rapper) (1970–2021), American rapper commonly referred to as "X"
* Shaun Ryder (born 1962), English musician also known as X
* Terminator X (born 1966), stage name for American DJ Norman Roberts, who worked with Public Enemy
* X, ring name of wrestler Carl Ouellet (born 1967)

### Other people

* X González (born 1999), American gun control activist
* Clyde X (1931–2009), Nation of Islam official
* Khoisan X (1955–2010), political activist
* Laura X (born 1940), feminist historian
* Malcolm X (1925–1965), civil rights activist
* Michael X (1933–1975), activist and criminal
* Xiuhtezcatl Martinez (born 2000), climate activist, often known as "X"
* X, the girl in the X Case, a landmark court case about abortion in Ireland
* X, pseudonymous author of the 1947 Foreign Affairs "X Article", formally titled "The Sources of Soviet Conduct"
* X, surname often assumed by members of the Nation of Islam

## Science, technology, and mathematics
### Astronomy

* X, signifying a comet of unknown orbit
* Galaxy X (galaxy), a postulated dark galaxy
* Planet X, a hypothesised planet in the outer solar system

### Computing

* OS X (pronounced 'OS ten'), former name of the Apple macOS operating system
* X Window System, referred to as X or X11, a client-server display protocol often used in UNIX environments
* X file format, used by DirectX
* X, the mnemonic for the execute instruction on the TI-990 and the TMS9900
* X#, a High-level assembler for the x86 processor architecture as part of the Cosmos operating system

### Mathematics

* X, Roman numeral for 10 (number)
* x, an axis in the Cartesian coordinate system
* x, a common variable for unknown or changing concepts in mathematics
* A typographical approximation for:
** Cross product (×)
** Multiplication sign (× or ✕)

### Physics

* X (charge), a conserved quantum number in particle physics
* X band, part of the microwave band of the electromagnetic spectrum
* X unit, unit of length in physics

### Other uses in science, technology, and mathematics

* × (or x), used in some types of hybrid names in botany
* X chromosome, a sex determinant in many animal species, including mammals
* X, the pseudoelement symbol for a halogen or halide in organic chemistry

## Automobiles

* Tesla Model X, an electric crossover by Tesla
* HiPhi X, an electric crossover automobile produced from 2020
* Zeekr X, a battery electric compact crossover SUV
* BMW X models, a series of SUV models

## Other uses

* Generation X, the Western sociological generation born after Boomers or Jonesers and before Millennials
* iPhone X, a smartphone by Apple Inc.
* X (fragrance), a fragrance set by Irish pop vocal band Westlife
* X (gender identity), used on passports and identification documents to denote intersex or indeterminate gender
* X (formerly Twitter), stylised as "$\mathbb {X}$", an American social networking service
* X mark, a common written symbol of negation or affirmation
* X, the symbol for a strike in bowling
* X, a handwritten symbol for a kiss
* X, a street name for the drug MDMA
* X, often used by straight edgers to show their commitment to their lifestyle
* ╳, a box-drawing character
* Ⓧ, a Japanese typographic symbol used in resale price maintenance
* X, the legal signature of an illiterate person
* The Xcel Energy Center ("The X"), an arena in Saint Paul, Minnesota, United States
* Nilgiri Mountain Railway X class
* , the official West Japan Railway Company service symbol for the San'yō Main Line