| Aktions Analytische Organisation | Academic & Science |
| Amino Acid Oxidase | Academic & Science |
| Amphenol Aerospace Operations | Business |
| American Association of Orthodontists | Business |
| Adept Solutions, LTD. (former code for Australasia Gold, LTD.) | Business |
| Alt Aproving Official | Business |
| Assistant Audit Officer | Business |
| Ashtabula Art Online | Community |
| Association of Architecture Organizations | Community |
| Archives Association of Ontario | Community |
| Add And Overflow | Computing |
| Alt Approving Official | Computing |
| All At Once | Computing |
| Assassin Alliance Organization | General |
| Administrative Appeals Office | General |
| Arkansas Athletes Outreach | General |
| Anodized Aluminum Oxide | General |
| Am Angegebenen Ort | General |
| Agenda at Once | General |
| Advanced Acoustic Optimization | General |
| Association of Aviation Ordnancemen | General |
| All At Onceness | General |
| Anodic Aluminum Oxide | General |
| Assistant Administrative Officer | General |
| Affirmative Action Officer | General |
| Arabidopsis aldehyde oxidase | General |
| Anodic Aluminium Oxide | General |
| Advanced Acoustics Optimization | General |
| Advanced Acoustic Optimisation | General |
| Adverse Assumption Obstacle | General |
| An Amber Original | General |
| Asst Administrative Officer | General |
| Add Another One | General |
| Assistant Agriculture Officer | General |
| Assistant Ambulance Officer | General |
| Anode Aluminum Oxide | General |
| Against All Odds | Governmental |
| Arab Advertising Organization | Governmental |
| Air Access Only | Governmental |
| Approved acquisition objective | Governmental |
| Assumed Adverse Obstacle | Governmental |
| Army Acquisition Objective | Governmental |
| Authorized Acquisition Objective | Governmental |
| American Academy of Osteopathy | Medical |
| American Academy of Otolaryngology. | Medical |
| American Association of Ophthalmology | Medical |
| American Academy of Optometry | Medical |
| Alert Awake Oriented | Medical |
| Colonel James Jabara Airport, Wichita, Kansas USA | Regional |
