| AOS | A O Smith 
| Others |
| AOS | Abandonment Of Services
| Others |
| AOS | Academic Operating System
| Others |
| AOS | Academic Orthopaedic Society
| Others |
| AOS | Access Optimization Service
| Others |
| AOS | Accredited Operations Specialist
| Others |
| AOS | Ace Of Spades
| Others |
| AOS | Acquisition Of Signal
| Others |
| AOS | Acquisition Of Spaceflight
| Others |
| AOS | Acropolis Operating System
| Others |
| AOS | Adaptive Optimization System
| Others |
| AOS | Add On Strobe
| Others |
| AOS | Add Or Subtract
| Others |
| AOS | Add-On Software
| Others |
| AOS | Add-On Stabilization
| Others |
| AOS | Adjustment Of Status
| Others |
| AOS | Advanced OEM Solutions
| Others |
| AOS | Advanced Operating System
| Others |
| AOS | Advanced Operations Solutions
| Others |
| AOS | Advanced Ophthalmic Systems
| Others |
| AOS | Advanced Ophthalmology Systems
| Others |
| AOS | Advanced Optical Systems
| Others |
| AOS | Advanced Optimization Systems
| Others |
| AOS | Adventures Of Scrabby
| Others |
| AOS | Aeon Of Strife
| Others |
| AOS | Aerosol Observing System
| Others |
| AOS | Aesthetic Of Sustainability
| Others |
| AOS | Age Of Sigmar
| Others |
| AOS | Agent Of Starfleet
| Others |
| AOS | Agent Oriented Software
| Others |
| AOS | Ago Open Source
| Others |
| AOS | Agriculture Ontology Services
| Others |
| AOS | Air Observer s
| Others |
| AOS | Air Observer School
| Others |
| AOS | Air Oil Separate
| Others |
| AOS | Airbag Occupant Supression
| Others |
| AOS | Aircraft Operations Specifications
| Others |
| AOS | Alabama Orthopaedic Society
| Others |
| AOS | Alcatel Operating System
| Others |
| AOS | ALE Operating System
| Others |
| AOS | Alexander Open Systems
| Others |
| AOS | Algebraic Operating System
| Others |
| AOS | All Optical Switch
| Others |
| AOS | ALL OS so
| Others |
| AOS | Alpha Olefin Sulfonate
| Others |
| AOS | Alpha Olefin Sulfonates
| Others |
| AOS | Alternate Operator Service
| Others |
| AOS | Alternate Option Selection
| Others |
| AOS | Alternative Organization Structure
| Others |
| AOS | America Out of Space
| Others |
| AOS | American Office Solutions
| Others |
| AOS | American Ophthalmological Society
| Others |
| AOS | American Orchid Society
| Others |
| AOS | American Oriental Society
| Others |
| AOS | American Ornithological Society
| Others |
| AOS | American Orthodontic Society
| Others |
| AOS | American Osler Society
| Others |
| AOS | American Ostomy Supply
| Others |
| AOS | American Otological Society
| Others |
| AOS | Amook Bay Seaplane Base, Amook, Alaska USA
| Others |
| AOS | An Operating System
| Others |
| AOS | Anadolu Otomotiv Sanayi
| Others |
| AOS | And Occasionally Soder
| Others |
| AOS | Android On Steroids
| Others |
| AOS | Animate on scroll
| Others |
| AOS | Annals of Statistics
| Others |
| AOS | Annunciation Orthodox School
| Others |
| AOS | Antonio Osborne Solera
| Others |
| AOS | Any Other Score
| Others |
| AOS | Apple Online Store
| Others |
| AOS | Application Operating System
| Others |
| AOS | Apraxia of speech
| Others |
| AOS | Apstra Operating System
| Others |
| AOS | Aratrika Online Services
| Others |
| AOS | Area Of Separation
| Others |
| AOS | Area of Specialization
| Others |
| AOS | Area Of Specialty
| Others |
| AOS | Area of Study
| Others |
| AOS | Armed Offenders Squad
| Others |
| AOS | Arms Of Spartan
| Others |
| AOS | Array Of Structures
| Others |
| AOS | Array Operations Site
| Others |
| AOS | Arrest On Sight
| Others |
| AOS | Art is Open Source
| Others |
| AOS | Art Of Speed
| Others |
| AOS | Art of Sport
| Others |
| AOS | Art of Symmetry
| Others |
| AOS | Aspherical Optics System
| Others |
| AOS | Associate in Occupational Studies
| Others |
| AOS | Associate of Occupational Studies
| Others |
| AOS | Associated Office Systems
| Others |
| AOS | Assurence Of Supplier
| Others |
| AOS | Atmospheric and Oceanic Sciences
| Others |
| AOS | Audience Operating System
| Others |
| AOS | Audio Operating System
| Others |
| AOS | Audio Overhaul for Skyrim
| Others |
| AOS | Automated Office Systems
| Others |
| AOS | Automatic Occupant Sensing
| Others |
| AOS | Automotive Occupancy Sensing
| Others |
| AOS | Automotive Open Source
| Others |
| AOS | Autorisierter Opel Service
| Others |
| AOS | Availability Of Service
| Others |
| AOS | Average Order Size
| Others |
| AOS | Installable program (Nokia Communicator add-on software)
| Others |