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

Medicine

• Aspartate transaminase, an enzyme associated with liver parenchymal cells
• Agitated saline test, a diagnostic heart procedure
• Antibiotic susceptibility testing, of bacteria
• Alternate site testing in blood glucose monitoring

Mathematics

• Alternating series test, tests whether infinite series converge
• Alternative set theory, an alternative mathematical approach to the concept of set

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

Politics and government

• Office of Commercial Space Transportation, a branch of the US FAA
• Alaska State Troopers, US state police force
• Chadian Social Action (Action Sociale Tchadienne), a defunct Chadian political party

Education

• ACT Scaling Test, for year 12 students, Australia
• Avanti Schools Trust, UK sponsor of state-funded Hindu schools
• Alpha Sigma Tau, a national collegiate sorority of the US
• Atlantic School of Theology, an ecumenical university in Atlantic Canada
• Conroe ISD Academy of Science and Technology, Texas, US
• Avalanche Skills Training, Canada
• American School of Tangier
• American School of Tegucigalpa
• American School of Tripoli
• Advanced Skills Teacher, a teaching role in England and Wales
• Air Service Training, a flight engineering training school

Transport

• Aldershot GO Station, Amtrak station code AST
• Astoria Regional Airport (FAA Identifier), airport of Clatsop County, Oregon, US
• Aston railway station (National Rail code), a station in Birmingham, England

Time zones

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

Other uses

• Aviation Survival Technician, a US Coast Guard rating
• 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 Team (UCI code), a professional road bicycle racing team