# AST

AST, Ast, or ast may refer to:

## Science and technology

* Attention schema theory, of consciousness or subjective awareness

### Computing

* Abstract syntax tree, a finite, labeled, directed tree used in computer science
* Anamorphic stretch transform, a physics-inspired signal transform
* Andrew S. Tanenbaum (born 1944), American-Dutch computer scientist, sometimes identified as "ast"
* Asynchronous system trap, a mechanism used in several computer operating systems
* Application security testing, testing the operation and security of a software application
* Application support team, a team of application support analysts supporting IT services delivered to users within an organisation, enabling the required operational processes needed for the business to be successful.

### Medicine

* Aspartate transaminase, an enzyme associated with liver parenchymal cells
* Antibiotic sensitivity testing or antibiotic susceptibility testing, the measurement of the susceptibility of bacteria to antibiotics

### Mathematics

* Alternative set theory
* Alternating series test

## Organizations

* Allied Security Trust, a patent holding company
* AST Research, a defunct personal computer manufacturer
* Association for Software Testing, US
* AST (publisher), a Russian book publishing company
* Arsenal Supporters' Trust, English football club supporters
* Augstsprieguma tīkls, independent electricity transmission state system operator in Latvia

### Politics and government

* Abwehrstelle or Ast, the local intelligence center in each military district in Nazi Germany
* Alaska State Troopers, state police agency in Alaska, US
* Chadian Social Action (French: Action Sociale Tchadienne), a former political party in Chad
* Office of Commercial Space Transportation, of the US FAA
* Asturians, as used by ast.wikipedia.org

## Education

* ACT Scaling Test, for year 12 students, Australia
* Advanced Skills Teacher, a teaching role in England and Wales
* Air Service Training, a flight engineering training school
* American School in Taichung, an international school in Taichung, Taiwan
* American School of Tangier
* American School of Tegucigalpa
* American School of Tripoli
* Atlantic School of Theology, Halifax, Nova Scotia, Canada
* Avalanche Skills Training, Canada
* Conroe ISD Academy of Science and Technology, Texas, US

## Transport

* Aldershot GO Station, Amtrak station code AST
* Astoria Regional Airport (FAA Identifier and IATA code AST), Clatsop County, Oregon, US
* Aston railway station (National Rail code), Birmingham, England

## Time zones

* Atlantic Standard Time, UTC−4
* Alaska Standard Time, UTC−9
* Arabia Standard Time, UTC+3
* Antigua and Barbuda Time, UTC−4

## Other uses

* Aviation Survival Technician, a US Coast Guard rating
* AST Research, Inc., as known as AST Computer, a personal computer manufacturer
* Asti, Italian province and city (was traditionally Ast in the Piemontese dialect)
* Assured shorthold tenancy, UK
* Asturian language (ISO 639 alpha-3: ast), Spain
* Astana Pro Team (UCI code AST), a professional road bicycle racing team
* Georg Anton Friedrich Ast, German philosopher and philologist (1778–1841)
* Pat Ast, American actress and model (1941-2001)
* AST SpaceMobile, American satellite manufacturer