| Acronym | Definition |
|---|
| AST | Abstract Syntax Tree |
| AST | Alaska Standard Time |
| AST | Astronomy |
| AST | Assessment |
| AST | Assistant |
| AST | Atlantic Standard Time |
| AST | Association of Surgical Technologists |
| AST | Aspartate Aminotransferase |
| AST | Alaska State Troopers |
| AST | ATEC (Army Test & Evaluation Command) System Team |
| AST | Ancient Sanctuary (Yu-Gi-Oh cards) |
| AST | American Staffordshire Terrier |
| AST | Antimicrobial Susceptibility Testing |
| AST | Alpha Sigma Tau (sorority) |
| AST | Assured Shorthold Tenancy (UK) |
| AST | American Stock Transfer & Trust Company |
| AST | Above-ground Storage Tank |
| AST | Association for Software Testing |
| AST | Associate Administrator for Commercial Space Transportation (FAA) |
| AST | Andrew S. Tanenbaum (computer science writer) |
| AST | Aerospace Technology |
| AST | Automation of Software Test (International Workshop) |
| AST | Asynchronous System Trap |
| AST | Atlantic School of Theology |
| AST | Administrative Support Technology |
| ast | Astralis (Finnish Counter-Strike clan) |
| AST | Appraisal Summary Table (Highways Agency in the UK) |
| AST | Asyut (Egyptian automobile license plate) |
| AST | Aviation Survival Technician |
| AST | Adaptive Structuration Theory |
| AST | Advanced Sensor Technology |
| AST | Average Seek Time (hard disk drive) |
| AST | Accelerated Stress Test |
| AST | Applied Security Technologies (CESG) |
| AST | Automatic Spanning Tree |
| AST | Advanced Skills Training |
| AST | Airborne Surveillance Testbed |
| AST | Apparent Solar Time |
| AST | Association of Science Teachers (Canada) |
| AST | Aerospace Technologist |
| AST | Astrometry Science Team |
| AST | Advanced Surface Technology |
| AST | Argo Science Team |
| AST | Army Science and Technology |
| AST | Advanced Supersonic Transport |
| AST | Automatic Summary Tables |
| AST | Aeronautics and Space Technology |
| AST | Advanced Secondary Treatment (wastewater) |
| AST | Alternating Series Test (calculus) |
| AST | Ambulance Strike Team |
| AST | Autonomous Star Tracker |
| AST | American School of Technology (Columbus, OH) |
| AST | Alternative Source Term (nuclear power, licensing) |
| AST | Active Segment Table |
| AST | Automated Screen Trading |
| AST | Air Superiority Target |
| AST | Astro Star Tracker (NASA) |
| AST | Automatic Scheduled Testing |
| AST | Advisor Support Team |
| AST | Address Search Tree |
| AST | Acute Systemic Toxicity |
| AST | Annecy Santé au Travail (French occupational health association) |
| AST | Assuming Seasonal Temperature (dead) |
| AST | Advanced Subsonics Technology |
| AST | Air Surveillance Technician |
| AST | Administrative-Supply Technician |
| AST | Agency Support Team |
| AST | Acquisition Support Team (US military) |
| AST | American Spray Technologies (Auburn, WA) |
| AST | Antimicrobial Sensitivity Test |
| AST | Asbestos Safety Technician (New Jersey certification) |
| AST | Advanced Structural Technologies |
| AST | Aerial Survey Team |
| AST | Army Staff Target |
| AST | Alternate Source Test |
| AST | American Segment Trainer |
| AST | assign secondary traffic channels (US DoD) |
| AST | Aircraft System Trainer |
| AST | Accelerated Service Test |
| AST | Army Satellite Tracking Center |
| AST | Avionics System Trainer |
| AST | Albert Safi Tom (AST Computers - Albert Wong, Safi Qureshey and Tom Yuen) |
| AST | Automobiles Sportives de Touraine (French motorsports club) |
| AST | Area Studies Team |
| AST | Advanced Surveillance Technology |
| AST | Advanced Surveillance Testbed |
| AST | Active Stealth Technology (aeronautics) |
| AST | Atlantic Software Technologies, Inc. |
| AST | Add Selected Text (AOL message boards) |
| AST | Airborne Surveillance Technician |
| AST | Administrative Site Procedures |
| AST | Analysis, Slicing, and Transformation Workshop |
| AST | Architectural Selection Tool |
| AST | Atmospheric Surveillance Technology |
| AST | AIR Support Team |
| AST | Air Supported Threat |
| AST | Andy Steven Trey Rocketry |
| AST | Americanstar Tours |
| AST | AVCO Systems Textron |
| AST | Asturian or Bable (ISO 639 language) |
| AST | Autoscan Tracking |
| AST | Analytical Simulation Team |
| AST | Advanced Submunitions Technology |
| AST | Aegis Stationary Target |
| AST | Air Speed Transducer |
| AST | Autocad Support Technician |
| AST | Agent's Service Text |
| AST | Autosomatic Training (self help technique) |
| AST | ARFORGEN (Army Force Generation) Synchronization Tool (US DoD) |
| AST | Applied Science & Technology (various schools) |
| AST | Action Sports Tour |
| AST | Application Server Toolkit (software) |
| AST | American Society of Transplantation (est. 1981) |
| AST | Australian Social Trends (publication; Australian Bureau of Statistics) |
| AST | Advanced Semiconductor Technology |
| AST | Alternativa Sindical de Trabajadores (Spanish: Alternative Trade Union of Workers) |
| AST | Asymptotic Stable Throughput (computer networking) |