AST

Look up AST, Ast, or ast in Wiktionary, the free dictionary.

AST is a three-letter abbreviation that stands for a number of different things.

In science and technology

• Abstract syntax tree, a finite, labeled, directed tree used in computer science
• Agitated saline test (agitated saline contrast test), a diagnostic heart procedure
• Andrew S. Tanenbaum, a computer scientist (often uses this acronym as his identifier)
• Aspartate transaminase, an enzyme associated with liver parenchymal cells
• Asynchronous System Traps, a mechanism used in several computer operating systems

In mathematics

• Alternating series test, a method used to prove that infinite series of terms converge
• Alternative set theory, an alternative mathematical approach to the concept of set

Organisations and companies

• Allied Security Trust, a patent holding company
• AST Research, Inc., a defunct personal computer manufacturer
• Association for Software Testing, a nonprofit organization dedicated to advancing software testing
• AST (publisher)
• AST Studios, an animation and visual effects company

In education

• Ameson Scholastic Test, originally designed for students who come from China, and be appling to the University of Cambridge of the UK, now used by a handful of UK and Australian universities.
• ACT Scaling Test, a series of aptitude tests taken by Year 12 students in ACT, Australia
• Alpha Sigma Tau, a national collegiate sorority of the United States
• Atlantic School of Theology, an ecumenical university in Atlantic Canada
• Conroe ISD Academy of Science and Technology, a specialized magnet school of science and technology in Conroe, Texas
• Avalanche Skills Training, a standardized form of avalanche training in Canada
• American School of Tegucigalpa
• Advanced Skills Teacher - a specific type of teaching role in England and Wales

In politics and government

• Office of Commercial Space Transportation, a branch of the US Federal Aviation Administration
• Aviation Survival Technician, the US Coast Guard's airborne "rescue swimmers"
• Alaska State Troopers, the state police force for the State of Alaska
• Action Sociale Tchadienne, a defunct Chadian political party

In transport

• Astoria Regional Airport, a public airport of Clatsop County, Oregon, USA (FAA Identifier: AST)
• Aston railway station, a railway station in Aston in Birmingham, England (National Rail code: AST)
• FAA/AST -- US Federal Aviation Administration's Office of Commercial Space Transportation

Time zones

• Atlantic Standard Time — UTC-4
• Alaska Standard Time — UTC-9
• Arabia Standard Time — UTC+3

Other uses

• Assured shorthold tenancy, a form of Assured tenancy with limited security of tenure
• Asturian language, a Romance language spoken in Asturias, Spain (ISO 639 alpha-3, ast)
• Arsenal Supporters' Trust, London, UK. Arsenal FC's critical friend of supporters and shareholders
• Athlitikos Syllogos Trikala 2000 BC, a top tier Greek basketball team
• Astana, the UCI code for the professional road bicycle racing team
• Anti Structure Tandem A tandem explosive charge where the second charge can be delayed so that it explodes deep inside the structure to blow it. (the first charge is the penetrator)

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