| Acronym | Definition |
|---|
| AS | American Samoa (US postal abbreviation) |
| AS | Access System |
| AS | Advanced Server (Microsoft Windows) |
| AS | All Source |
| AS | All Star (sports) |
| AS | Another Subject |
| AS | Anti-Social |
| AS | After-Sales Service |
| AS | Archive Server |
| AS | Area Security |
| AS | Area Source |
| AS | Australia (including Ashmore, Cartier & Coral Sea Islands) |
| AS | Application Server |
| AS | Application Software (NEC) |
| AS | Application System |
| AS | Air Speed |
| AS | All Stars (Disney resort) |
| AS | Activity Start (ITU-T) |
| AS | Wait (logging abbreviation) |
| AS | Academy of Science |
| AS | Agent Society (International Society on Intelligent Agent Technologies) |
| AS | Associated Students |
| AS | Australian Standard |
| AS | Associated Support |
| AS | Arm Slave (anime) |
| AS | Administrative Site |
| AS | Administrative Support |
| AS | Administrative System (Bellcore) |
| AS | Applied Science |
| AS | Assigned (Telabs) |
| AS | Anti Static |
| AS | Alpha Smart (electronic keyboard) |
| AS | After Sight |
| AS | Associate in Science |
| AS | Assistant Secretary |
| AS | Aviation Safety |
| AS | Associate of Science |
| AS | As Stated |
| AS | Adult Situations |
| AS | Additional Shift (used on overtime forms) |
| AS | Adult Swim (Cartoon Network programming block) |
| AS | American Samoa (top-level domain name) |
| AS | Adopted Son |
| AS | Acquisition Strategy |
| AS | Australian Shepherd (dog breed) |
| AS | Air Sealed |
| AS | Analog Switch |
| AS | Approaches Standards (school grading system) |
| AS | Automation Specialist |
| AS | Asian Sensation |
| AS | Athletics (Oakland baseball team) |
| AS | Audit Standards (Public Company Accounting Oversight Board) |
| AS | Assault Support |
| AS | ATM Switch |
| AS | Attachment Sheet |
| AS | Area Surveillance |
| AS | Complex Antenna |
| AS | Answer Supervision |
| AS | Alarm Surveillance |
| AS | Advanced Switching |
| AS | Authentication Service |
| AS | Authentication Server |
| AS | Angle Slam (wrestling finishing move) |
| AS | Abstract Syntax |
| AS | Advanced Subsidiary level (UK) |
| AS | Arsenal Ship |
| AS | Aviation Support Equipment Technician |
| AS | Aerospace Studies |
| AS | Anti-Spoofing |
| AS | Aerospace Corporation |
| AS | Area Supervisor (FAA ARTCC Area Supervisor 1 or more Sector Suites) |
| AS | Aggregate Supply (economics) |
| AS | Aerospace Society |
| AS | American Standard (Piscataway, NJ) |
| AS | Abandon Ship |
| AS | Alignment Signal (ITU-T) |
| AS | Submarine Tender |
| AS | Allowance Standard |
| AS | Auxiliary Steam |
| AS | Autonomous System (ATM) |
| AS | Anglo-Saxon |
| AS | Advanced Supplementary (education testing level; also seen as A/S) |
| AS | Arnold Schwarzenegger (body builder, actor, politician) |
| AS | Asbestos Survey |
| AS | Alto Saxophone |
| AS | Artificial Stupidity |
| AS | Assistant Referee (Soccer) |
| AS | Anakin Skywalker (Star Wars Character) |
| AS | Additive Solution (preservative to extend life of red blood cells) |
| AS | Apprentice Seaman |
| AS | Air Superiority |
| AS | Air Station |
| AS | Applicability Statement |
| AS | Angled Single |
| AS | Asperger Syndrome (Asperger's Disorder) |
| AS | Ascent Stage |
| AS | Adam Sandler (actor) |
| AS | Add/Subtract |
| AS | Address Strobe |
| AS | Authorization Subsystem |
| AS | Automatic Sprinkler |
| AS | Analysis Subsystem |
| AS | Ancillary Services |
| AS | Ankylosing Spondylitis (chronic inflammatory form of arthritis affecting the spine) |
| AS | Alessandro Scarlatti (classical composer) |
| AS | Antichrist Superstar (Marilyn Manson album) |
| AS | Auger Spectroscopy |
| AS | Arsenic |
| AS | Sickle-cell Trait (carrier; genetics) |
| AS | Accounting Standard |
| AS | Alka-Seltzer |
| AS | Así Somos (Spanish: So We; British television series) |
| AS | Actionscript (scripting language used in flash, similar to Java) |
| AS | Administrative Simplification |
| AS | Agency Services |
| AS | Aqueous Solution |
| AS | Acute Sinusitis |
| AS | Aggressor Squadron |
| AS | American Singles |
| AS | Audioslave (band) |
| AS | Agrarian System |
| AS | Anatolian Studies |
| AS | Access Stratum (3GPP) |
| AS | AppleScript |
| AS | Airlift Squadron |
| AS | Air Sampling (station) |
| AS | Annual Summary |
| AS | Aortic Stenosis |
| AS | Activesync (Microsoft software) |
| AS | Anal Seepage |
| AS | Academia Sinica (Taiwan) |
| AS | Angel Sanctuary (Manga) |
| AS | Apollo-Saturn (US NASA) |
| AS | AfterStep (Window Manager for X) |
| AS | Angelman Syndrome |
| AS | Aanstaande |
| AS | Advanced Schottky |
| AS | AppleShare |
| AS | Angry Son (band) |
| AS | Aeronautical Science (Flight Major) |
| AS | Associazione Sportiva (Italian: sports club) |
| AS | Aes Sedai (Wheel of Time book series) |
| AS | Assault Ship (Eve Online gaming) |
| AS | Antisubmarine |
| AS | Aerospace Standards |
| AS | Armée du Salut (Salvation Army) |
| AS | Altostratus (cloud formation) |
| AS | Anonymous Sender |
| AS | Anti Sweat |
| AS | Ammunition Specialist |
| AS | Anti Surge (type of electric fuse) |
| AS | Acrylonitrile Styrene |
| AS | Airfield Services |
| AS | Anonim Sirketi (Turkish: Joint Stock Company) |
| AS | Aviation Ship (US DoD) |
| AS | Author Space (webcomic) |
| AS | Aggregate Subbase (construction) |
| AS | Aperture Stop |
| AS | Ahead Station (transportation) |
| AS | Amino Salicylic Acid |
| AS | Assault at Selonia (Star Wars novel) |
| AS | Assassin/Assassination |
| AS | Alaska Airlines, Inc., Alaska (IATA airline code) |
| AS | Aksje Selskap (Norwegian: Limited Company) |
| AS | Alayhis Salaam (Arabic: Peace Be upon Him) |
| AS | Auxiliary Submarine |
| AS | Aft Shroud |
| AS | Analog Secure (US DoD) |
| AS | Autos Suecos (Spanish: Swedish Cars) |
| AS | Ablaufsprache (German: Sequential Function Chart) |
| AS | Anno Satanas |
| AS | Ammeter Switch |
| AS | Ampere Switch |
| AS | Articulation Score |
| AS | Anvil Stratus |
| AS | Anti-Scintillation |
| AS | Allery Scotts Ltd (UK) |
| AS | Austin Servers (online gaming community) |
| AS | Ampere Sensor |
| AS | Auris Sinister (Latin: Left Ear) |
| AS | Aryl Sulphate |
| AS | Air Seasoned Timber |
| AS | Autosavants.com (car enthusiasts) |
| AS | Acquisition/Application System |
| AS | Anaerobic Seeder |
| AS | Aspheric Subassembly |
| AS | (USN Rating) Aviation Support Equipment Technician |