| A&AS | Advisory and Assistance Service 
| Others |
| AAS | Abdominal Aortic Surgery
| Others |
| AAS | Abuse Assessment Screen
| Others |
| AAS | Academy of Arts Sciences
| Others |
| AAS | Aching Arm Syndrome
| Others |
| AAS | Acid Aspiration Syndrome
| Others |
| AAS | Acta Apostolica Sedis
| Others |
| AAS | Acta Apostolicae Sedis
| Others |
| AAS | Acute Abdominal Series
| Others |
| AAS | Adagio Audio Server
| Others |
| AAS | Adaptive Air Suspension
| Others |
| AAS | Adaptive Antenna System
| Others |
| AAS | Address Allocation Server
| Others |
| AAS | Advance And Secure
| Others |
| AAS | Advanced Analytics Specialist
| Others |
| AAS | Advanced Antenna System
| Others |
| AAS | Advanced Antenna Systems
| Others |
| AAS | Advanced Automation System
| Others |
| AAS | Advanced Automation Systems
| Others |
| AAS | Advanced Automotive Services
| Others |
| AAS | Aerospace Advocates Society
| Others |
| AAS | African Academy of Sciences
| Others |
| AAS | Agence Automobile du Sud
| Others |
| AAS | AIDS Attitude Scale amino acid sequence
| Others |
| AAS | Air Adjusting Screw
| Others |
| AAS | Airport Advisory Service
| Others |
| AAS | Albany Auto Show
| Others |
| AAS | Alcohol Abstinence Syndrome
| Others |
| AAS | Alcohol Action Service
| Others |
| AAS | Alert Area Supervisor
| Others |
| AAS | Alfa Active Suspension
| Others |
| AAS | Alive And Smiling
| Others |
| AAS | All About Symbian
| Others |
| AAS | All America Selection
| Others |
| AAS | All America Selections
| Others |
| AAS | All American Selection
| Others |
| AAS | All Around Style
| Others |
| AAS | All to All Scatter
| Others |
| AAS | allergic Aspergillus sinusitis
| Others |
| AAS | Almelo Ayurveda Silva
| Others |
| AAS | Almost A Star
| Others |
| AAS | Amazing Animal Service
| Others |
| AAS | American Academy of Sciences
| Others |
| AAS | American Antiquarian Society
| Others |
| AAS | American Archaeological Society
| Others |
| AAS | American Association of Suicidology
| Others |
| AAS | American Astronautical Society
| Others |
| AAS | American Astronomical Society
| Others |
| AAS | American Astrophysical Society
| Others |
| AAS | American Auditory Society
| Others |
| AAS | American Automotive Summit
| Others |
| AAS | Amputee Activity Score
| Others |
| AAS | Anabolic And Androgenic Steroids
| Others |
| AAS | Anabolic Androgen Steroid
| Others |
| AAS | Anabolic Androgenic Steriod
| Others |
| AAS | Anabolic Androgenic Steroid
| Others |
| AAS | Anabolic Androgenic Steroids
| Others |
| AAS | Analysis of Alternatives Study
| Others |
| AAS | Androgenic Anabolic Steroid
| Others |
| AAS | Androgenic Anabolic Steroids
| Others |
| AAS | Aneurysm of Atrial Septum
| Others |
| AAS | Angle Angle Side
| Others |
| AAS | Ann Arbor Staging
| Others |
| AAS | Anno Aetatis Suae (Died in the year of (his/her) age)
| Others |
| AAS | Anti Amber Squad
| Others |
| AAS | Anytime Anywhere School
| Others |
| AAS | Anywhere Anytime Service
| Others |
| AAS | Aortic Arch Syndrome
| Others |
| AAS | Apple App Store
| Others |
| AAS | Application Analysis Solution
| Others |
| AAS | Applied Acoustics Systems
| Others |
| AAS | Aquatic Agricultural Systems
| Others |
| AAS | Archaeology, Astronautics, and Seti
| Others |
| AAS | Argentine Association of Sedimentology
| Others |
| AAS | Arms Abs and Shoulders
| Others |
| AAS | Army Apprentices School
| Others |
| AAS | Arnold Air Society
| Others |
| AAS | Arrogance, Apostasy, and Stupidity
| Others |
| AAS | As A Service
| Others |
| AAS | ASCII Adjust after Subtraction
| Others |
| AAS | Assessment Administration Specialist
| Others |
| AAS | Associate Applied Science
| Others |
| AAS | Associate in Applied Science
| Others |
| AAS | Associate in Applied Sciences
| Others |
| AAS | Associate of Applied Science
| Others |
| AAS | Associate of Applied Science in Nursing
| Others |
| AAS | Associate of Applied Sciences
| Others |
| AAS | Associate of Arts and Sciences
| Others |
| AAS | Associates in Applied Science
| Others |
| AAS | Association for Academic Surgery
| Others |
| AAS | Association for Asian Studies
| Others |
| AAS | Association of Amherst Students
| Others |
| AAS | Assyrian Academic Society
| Others |
| AAS | Asymptotically Almost Surely
| Others |
| AAS | Atelier Architecture and Scenography
| Others |
| AAS | Atelier Architecture Scenography
| Others |
| AAS | atlantoaxial subluxation
| Others |
| AAS | Atomic Absorption Spectophotometry
| Others |
| AAS | Atomic Absorption Spectrometry
| Others |
| AAS | Atomic Absorption Spectrophometer
| Others |
| AAS | Atomic Absorption Spectrophotometry
| Others |
| AAS | Atomic Absorption Spectroscopy
| Others |
| AAS | Austin American Statesman
| Others |
| AAS | Australian Academy of Science
| Others |
| AAS | Australian Accounting Standard
| Others |
| AAS | Australian Association of Surgeons
| Others |
| AAS | Austrian Academy of Sciences
| Others |
| AAS | Authorware Shocked Packet
| Others |
| AAS | Auto Adjustment System
| Others |
| AAS | Auto Available Split
| Others |
| AAS | Autoliv Asia
| Others |
| AAS | Automated Accounting System
| Others |
| AAS | Automatic Addressing System
| Others |
| AAS | Automatic Adjusting Suspension
| Others |
| AAS | Automobile Association of Singapore
| Others |
| AAS | Automotive Aerodynamics and Safety
| Others |
| AAS | Auxiliary Alarm Sensor
| Others |
| AAS | Average Access Speed
| Others |
| AAS | Average Active Sessions
| Others |
| AAS | Average Annual Salary
| Others |
| AAS | Azure Analysis Service
| Others |