ID
ID or its variants may refer to:

Identity document, a document used to verify a person's identity
Identifier, a symbol which uniquely identifies an object or record

People
I. D. Ffraid (1814–1875), Welsh poet and Calvinistic Methodist minister
I. D. McMaster (1923–2004), American assistant district attorney
I. D. Serebryakov (1917–1998), Russian lexicographer and translator

Places
İd or Narman, a town in Turkey
Idaho, US (postal abbreviation ID)
Indonesia, ISO 3166-1 alpha-2 country code "ID"
Indonesian language, ISO 639-1 language code "ID"

Arts, entertainment, and media
Music
The Id (band), an English new wave/synthpop band

Albums
I.D. (album), a 1989 album by The Wailers Band
ID (Michael Patrick Kelly album), a 2017 studio album by Michael Patrick Kelly
Id (Siddharta album), 1999
[id] (Veil of Maya album), 2010
ID, an album by Anna Maria Jopek
The Id (album), a 2001 studio album by Macy Gray

Songs
ID (song), a 2015 single by Kygo
I.D., a 2004 song by Kasabian from their self-titled album

Periodicals
I.D. (magazine), an American magazine focusing on Architecture, Graphic and Industrial Design
i-D, a British fashion magazine
Ideas and Discoveries (i.D.), a magazine covering science, with heavy interest in social science

Television
"I.D." (Law & Order), an episode of Law & Order
Investigation Discovery, an American cable television channel

Film
I.D. (1995 film), a British film about football hooliganism
I.D. (2012 film), an Indian Hindi drama
The Id (film), a 2016 American thriller/horror film

Other uses in arts, entertainment, and media
I.D. (play), 2003 British play by Anthony Sher
Id (comics), a manhwa by Kim Daewoo, art by A. T. Kenny'
Id, a fictional kingdom in The Wizard of Id, an American comic strip
iD (video game), a 1986 computer game
Investigation Discovery, stylized as "ID", an American pay television network

Brands and enterprises
ID (public relations), a public relations firm
ID Labs, an American music production and engineering team
iD Mobile, a telephone network owned by Carphone Warehouse
Interlink Airlines (IATA airline code ID), an airline based in Johannesburg, South Africa
Batik Air (IATA airline code ID), an airline based in Jakarta, Indonesia
Citroën ID, a variant of the Citroën DS car
Volkswagen ID. series, a series of concept cars that have been promoted into production
id Software, an American video game developer

Finance
International dollar, common name for the Geary–Khamis dollar, a hypothetical unit of currency
Invoice discounting, a form of Factoring (finance) in the UK

Politics
Inclusive Democracy, a project that aims for direct, economic, social, and ecological democracy
Independent Democrats, a political party in South Africa
Identity and Democracy, a political group in the European Parliament

Science, technology, and mathematics
Biology and medicine
Ide (fish), also spelled Id
Infectious disease
Infectious dose
Intellectual disability, a generalized neurodevelopmental disorder

Computing
Id (programming language), a parallel functional programming language
iD (software), an editor for OpenStreetMap geodata
id (Unix), a command to retrieve group and user identification
.id, the Internet Top Level Domain code for Indonesia
id, the generic object datatype in the Objective-C programming language
Instruction decoder, a decoder in CPUs
Internet Draft, a working document of the IETF

Design and engineering
Industrial design, a process of designing products for mass production
Information design, the practice of presenting information in a way that fosters understanding
Inside diameter, also 'inner diameter' or 'I.D.'; a dimension commonly used to specify the size of tubing or pipe
Interaction design, the practice of designing interactive digital products, environments, systems, and services
Interior design, the art and science of enhancing the interior of a building
Instructional design, the study of creating better instructional experiences

Mathematics
Identity function, a function that always returns the same value that was used as its argument
Influence diagram, a graphical and mathematical representation of a decision situation
Icosidodecahedron, a uniform polyhedron

Psychology
Id, one of the Id, ego and super-ego psychic apparatus defined in Sigmund Freud's structural model of the psyche

Other uses
ID (classification), a Paralympic rowing classification
Id., Latin, short for idem (translation: "the same"), used in legal citations to refer to the previous citation
Indonesian language (ISO 639-1 code "id"), a standardized register of Malay
Id (cuneiform), a common-use sign in cuneiform texts
Intelligent design, a pseudoscientific argument for the existence of God

See also
1D (disambiguation)
LD (disambiguation)
Identification (disambiguation)