# Q (disambiguation)

Q, or q, is the seventeenth letter of the English alphabet.
Q may also refer to:

## People

* Q, pseudonym of Sir Arthur Quiller-Couch, the Cornish writer
* Q, pseudonym used by the originator of QAnon, an American far-right conspiracy theory
* Q, pseudonym of Quentin Elias in his appearances in gay porn site Randy Blue
* Q, stage name for Qurram Hussain of JoSH
* Q, stage name for Q Marsden
* Q, stage name for Robert Severson (born 1996)
* Q, nickname for NBA assistant coach Bruce Fraser
* Q, or Q Martel, nicknames of Giffard Le Quesne Martel
* Q, nickname for Joel Quenneville
* Q, nickname of Qaushiq Mukherjee, an Indian film director
* Q, nickname of Quincy Jones
* Q, nickname of American basketball player Quintin Dailey (1961–2010)
* Q, nickname of former American football player Anquan Boldin
* Q, main dancer and vocalist of South Korean boy band The Boyz
* Maggie Q (born 1979), American actress
* Schoolboy Q, rapper
* Stacey Q, disco singer
* Brian "Q" Quinn, member of the American comedy troupe The Tenderloins

## Arts, entertainment, and media
### Fictional entities

* Q (James Bond), a character in the James Bond novels and films
* Q (Star Trek), a character and the name of the character's species
* Q (Street Fighter), a character from the video game series Street Fighter
* Q, an amnesiac child from the video-game Zero Time Dilemma
* Quinton "Q" Brooks, a character from the TV series Moesha
* Ah Q, the main character in the novella The True Story of Ah Q
* The Q, a character from the TV series The Lost Islands

### Literature

* Q (magazine), British music magazine
** Q Awards, yearly music awards given by Q magazine
* Q (novel), historical novel by Luther Blissett first published in Italian in 1999
* Q source, also known as Q document, a hypothetical early Gospel writing (Bible)
* "Q" Is for Quarry, the seventeenth novel in Sue Grafton's Alphabet Mystery series, published in 2002

### Music

* Q (1970s band), an American disco group
* SSQ (band), formerly Q, an American synth-pop band
* Q (album), Japanese language album by Mr. Children, 2000
* Q, jazz album by Tom Hasslan's Krokofant
* "Q" (song), by Mental Cube (The Future Sound of London), 1990
* "Q", a song by AAA, 2006

### Networks, stations, and channels

* Q (TV network), Philippine network previously known as Quality TeleVision (QTV)
* ARY Qtv, a Pakistani television channel
* Q Radio, a UK radio station run by Q magazine
* Q Radio, a former Philippine radio network (2019–2023) of Mareco Broadcasting Network and Horizon of the Sun Communications
** DWBM-FM, its former flagship station
* Q Television Network, an American cable television network
* Q TV, a UK music channel based on Q magazine
* Q Channel, former names of BTV, an Indonesian television network
* Q 104.3, a radio station in New York City

### Other titled works

* Q (1982 film), horror film written and directed by Larry Cohen (Also known as Q – The Winged Serpent)
* Q (2011 film), French film
* q (radio show), CBC Radio One show, formerly called Q
* Q (TV series), Spike Milligan's BBC2 comedy series that ran between 1969 and 1983
* Q, the production code for the 1965 Doctor Who serial The Space Museum

## Business and government

* Q (dairy), Norwegian dairy brand
* Q clearance, United States Department of Energy security clearance
* Q Score, in marketing, way to measure the familiarity of an item
* Q Theatre, a theatre in London, England
* Q-telecom, Greek operator
* Motorola Q, smartphone released in 2006
* Pentax Q, mirrorless interchangeable lens camera released in 2011
* Tobin's q, a financial ratio developed by James Tobin

## Computing and computer games

* Amazon Q, AI–powered assistant released in 2023
* Q (cipher), encryption algorithm
* Q (emulator), open-source x86 emulator for Mac OS X
* Q (equational programming language), functional programming language based on term rewriting
* Q (game engine), 3D middleware from Qube Software
* Q-learning, AI algorithm
* Q (number format), fixed-point number format built into certain computer processors
* Q (programming language from Kx Systems), array processing language
* Q (software), a computer software package for molecular dynamics simulation
* Q Sharp (Q#), domain-specific programming language
* Q, a channel service in QuakeNet's IRC services
* Panasonic Q, a hybrid video game console between a GameCube and a DVD player, manufactured by Nintendo and Panasonic
* Q*, a rumored OpenAI project
* Q Entertainment, developer of Rez HD and the Lumines and Meteos games
* Q-Games, developer of the Pixel Junk series of PlayStation 3 games

## Engineering

* Q, the standard abbreviation for an electronic transistor, used e.g. in circuit diagrams
* Q the first moment of area, used in calculating shear stress distributions
* Q, the reactive power component of apparent power
* Q Factor (bicycles), the width between where the pedals attach to the cranks
* Q factor or Q in resonant systems, a measurement of the effect of resistance to oscillation

## Linguistics

* Voiceless uvular stop in the International Phonetic Alphabet
* Abbreviation for Question

## Mathematics

* $\mathbb {Q}$ or Q, set of all rational numbers
* Q, the Quaternion group
* Q, Robinson arithmetic, a finitely axiomatized fragment of Peano Arithmetic
* Q value in statistics, the minimum false discovery rate at which the test may be called significant

## Science
### Biology and chemistry

* Q, the symbol for discharge (hydrology)
* q, an abbreviation for "every" in medicine
* Q, abbreviation for the amino acid, glutamine
* Q, abbreviation for quinone
* q, designation for the long arm of a chromosome
* Q, reaction quotient
* Cardiac output (Q), the volume of blood pumped by each ventricle per minute
* Coenzyme Q, a carrier in electron transport
* Haplogroup Q (mtDNA), a human mitochondrial DNA (mtDNA) haplogroup
* Haplogroup Q-M242 (Y-DNA), a Y-chromosomal DNA (Y-DNA) haplogroup
* Q value (nuclear science), the differences of energies of the parent nuclides to the daughter nuclides

### Physics and astronomy

* Q or q, dynamic pressure
** Max q
* Q, electric charge
* q, elementary charge
* Q, Fusion energy gain factor
* Q, heat
* q, momentum transfer
* Q, quasar
* q, quecto-, a metric prefix of 10$^{−30}$
* Q, quetta-, a metric prefix of 10$^{30}$
* Q, Toomre's Stability Criterion
* Q, volumetric flow rate
* q, quark

## Sports

* Great Southern Bank Arena, formerly JQH Arena, a nickname for the arena on the campus of Missouri State University
* Q (San Jose Earthquakes mascot), furry blue mascot of the Major League Soccer team San Jose Earthquakes
* San Diego Stadium, later Qualcomm Stadium, a nickname for a stadium in San Diego, California
* Quebec Major Junior Hockey League, often referred to as "The Q"
* Q, a nickname for Rocket Arena, Cleveland, Ohio; from the arena's previous name, Quicken Loans Arena

## Transportation

* Q (New York City Subway service)
* Q-ship, converted merchant vessels with concealed armament intended to lure and destroy submarines
* , the official West Japan Railway Company service symbol for the Kansai Line and Yamatoji Line.

## Other uses

* Q Society of Australia, right-wing, anti-Islamic political society
* Q, a nickname for Chuluaqui-Quodoushka, a series of New Age sexual meditation exercises developed by Harley Reagan
* Quintals, an archaic method of measuring crop yield, was often abbreviated as q
* Quarter, as in "Q1", "Q2", "Q3" and "Q4", a three-month period in a calendar year
* Q. texture, a Taiwanese term describing the ideal texture of many foods
* Initiative Q, a new payment network and digital currency devised by Saar Wilf
* Quebec, the military time zone code for UTC−04:00
* Sky Q, a subscription-based television and entertainment service
* The Q (nightclub), an LGBT nightclub in New York City