# Tag

Tag, TAG, or tagging may refer to:

## Identification and tracking

* Tag (graffiti), a form of graffiti signature
* Dog tag (military), an ID tag worn by military personnel
* Ear tag, an ID tag worn by farm animals
* Electronic tagging, a form of surveillance using a device attached to a person or vehicle
* Kimball tag, predecessor to the barcode, used to identify products to a stock control system
* Pet tag, an ID tag worn by pets
* Price tag, a label declaring the price of an item for sale
* QR code or mobile tag, a type of matrix barcode
* RFID tag, passive electronic inventory stock control technology
* Toe tag, an ID tag worn by dead bodies in the morgue
* Triage tag, a tool used to classify victims of mass casualty incidents
* Tagging (stamp)

## Arts, entertainment, and media
### Fictional characters

* Tag (comics), a Marvel character
* Tag, a member of The Squirrels from the animated preschool show Hey Duggee
* Tag, the main character of the game ModNation Racers
* Tag, the main character of the TV series Rimba Racer

### Films

* Tag (2015 film), Japan
* Tag (2018 film), US

### Music

* "Price Tag", a 2011 song by Jessie J
* Tag (barbershop music), a dramatic variation in the last section of a song
* TAG Recordings, a record label
* Producer tag, a brief sound clip as the signature of the producer of the music track

### Television

* Tag (TV channel), a defunct Philippine TV channel
* T@gged, a 2016–2018 American web series
* "Tagged" (The Penguins of Madagascar episode)
* "The Tag" (The Amazing World of Gumball episode)

### Theatre

* TAG Theatre Company, a touring theatre company in Scotland
* The Theatre Arts Guild or TAG, a community theatre in Halifax Nova Scotia

### Other arts, entertainment, and media

* Tag (advertisement), a sportswear commercial
* Tag: The Power of Paint, a computer game
* Tag Entertainment, a film production company
* Tagged (website), a social networking site
* Tagging (graffiti), a form/style of graffiti signature
* Post-credits scene, a clip appearing at the end of some media

## Brands and enterprises

* TAG Body Spray
* Tag Games, developer in Scotland
* TAG Group, Luxembourg
* TAG Heuer, watchmaker
* TAG Oil, New Zealand
* Tennessee, Alabama and Georgia Railway, reporting mark
* Transportes Aéreos Guatemaltecos, a Guatemalan airline

## Computing

* TAG (BBS), bulletin board software
* Tag (Facebook), a link in Facebook
* Tag (metadata) (a more flexible form of categories)
* Tag (programming), for passing parameters
* Tags (Unicode block), with formatting tag characters
* Tag, an element in several markup languages
** HTML tag
* Revision tag, for a specific revision
* Audio tag, see Metadata § Digital music
* Tag files, an index of source code identifiers
* Tag system, a deterministic computational model
* Tag URI, a unique identifier protocol
* Technical Architecture Group, a W3C group
* Tag management system, used to manage the life cycle of digital marketing tags

## Government and political organizations

* State adjutant general, US
* Tactical Assault Group, Australia
* Tamils Against Genocide
* Treatment Action Group, an HIV/AIDS activist organization
* -Tag, a German word for "Diet" or "Assembly" (see: Bundestag)

## Language and education

* Tag (Hebrew writing), a decoration
* Tag (LeapFrog), an interactive reading device
* Hashtag
* Part-of-speech tagging
* Tag question, a statement converted to a question
* Talented and Gifted program, in education
** School for the Talented and Gifted, Dallas, Texas, US
* Tree-adjoining grammar

## Natural science

* 3-methyladenine DNA glycosylase I, called TAG in E. coli
* Protein tag, a biochemistry method
* Skin tag, a small benign tumour
* Theoretical and Applied Genetics, a scientific journal
* Timneh African grey, a parrot
* Triglyceride or Triacylglycerol, often shortened to TAG
* Tumor-associated glycoprotein, a type of protein
* TAG, a stop codon

## People with surname Tag

* Katrin Lea Tag (born 1972), German scenic designer and costume designer
* Kezban Tağ (born 1993), Turkish footballer

## Sport

* Tag (game), a playground game
* Tag (horse), an 18th-century thoroughbred racehorse
* Tag out, a play in baseball
* Tag team, a type of wrestling
* Alex Tagliani, Canadian racecar driver, nicknamed "Tag"

## Other uses

* Bohol–Panglao International Airport, Philippines, IATA code
* Former Tagbilaran Airport, Bohol, Philippines, IATA code
* Topological abelian group, in mathematics
* Trans Austria Gas Pipeline
* Transcendental argument for the existence of God