Key

Key or The Key may refer to:

Common meanings

Key (cryptography), a piece of information that controls the operation of a cryptography algorithm
Key (lock), device used to control access to places or facilities restricted by a lock
Key (map), a guide to a map's symbology
Key, on a typewriter or computer keyboard
Answer key, a list of answers to a test

Cay, also spelled key, a small, low-elevation, sandy island formed on the surface of a coral reef

Key, Alabama
Key, Ohio
Key, West Virginia
Keys, Oklahoma
Florida Keys, an archipelago of about 1,700 islands in the southeast United States

The Key (1934 film), a 1934 film directed by Michael Curtiz
The Key (1958 film), a war film directed by Carol Reed, starring William Holden and Sophia Loren
The Key, also known as Odd Obsession, a 1959 Japanese film directed by Kon Ichikawa
The Key (1961 film), a Soviet animated feature
The Key (1965 film), a Yugoslav omnibus film
The Key (1971 film), a Czechoslovakian drama
The Key (1983 film), an Italian erotic film directed by Tinto Brass, starring Stefania Sandrelli
Kelid (The Key), a 1987 Iranian film written by Abbas Kiarostami
The Key (2007 film), a French thriller film directed by Guillaume Nicloux
Key (film), a 2011 film
The Key (2014 film), an American film directed by Jefery Levy

The Key (comics), a supervillain in the DC Comics universe
The Key (Curley novel), by Marianne Curley
The Key (Elfgren and Strandberg novel), by Mats Strandberg and Sara Bergmark Elfgren
The Key (Tanizaki novel), by Jun'ichirō Tanizaki
"The Key" (short story), a 1966 short story by Isaac Asimov
The Key, a 1969 book of etymology by John Philip Cohane

Unique Key, a field in a computer file or database used to identify, sort or retrieve records
Key (engineering), a type of coupling used to transmit rotation between a shaft and an attached item
KeY, a software verification tool
The Key (smartcard), a contactless smartcard for public transport ticketing in Britain
.key, file extension used by Keynote
Identification key, used to identify biological entities
Telegraph key, the button used by a telegraph operator

Key (company), a Japanese visual novel studio
The Key School, an independent coeducational school in Annapolis, Maryland
Keys, a truce term used in western Scotland
Amazon Key, a service by Amazon allowing customers to get deliveries inside of their home or car
House of Keys, the directly elected lower branch of Tynwald, the parliament of the Isle of Man
Samara (fruit) or key, a type of fruit