| Rank | Abbreviation | Meaning |
|---|
| ***** | AOSC | Acute Obstructive Suppurative Cholangitis
| |
| *** | AOSC | AIRCRAFT OPERATOR SECURITY COORDINATOR
| |
| *** | AOSC | Association of Oilwell Servicing Contractors
| |
| *** | AOSC | Association of Student Councils
| |
| ** | AOSC | Atmospheric and Oceanic Science
| |
| ** | AOSC | Airsoft Organization of South Carolina
| |
| ** | AOSC | Airport Obstruction Standards Committee
| |
| ** | AOSC | Aids Orphans and Street Children
| |
| ** | AOSC | Australasian Occupational Science Centre
| |
| * | AOSC | Administrative and Operational Services Costs
| |
| * | AOSC | Aspect Oriented Software Composition
| |
| * | AOSC | Africa Organic Service Centre
| |
| * | AOSC | Austrian Open Source Certificate
| |
| * | AOSC | Applied Operating System Concepts
| |
| * | AOSC | Andrews Officers' Spouses' Club
| |
| * | AOSC | Ambulatory Outpatient Surgery Center
| |
| * | AOSC | All Ohio Scanner Club
| |
| * | AOSC | Atlanta Outdoor Social Club
| |
| * | AOSC | Athabasca Oil Sands Corporation
| |
| * | AOSC | Air Operations Simulation Centre
| |
| * | AOSC | Africa Organic Service Center
| |
| * | AOSC | Art of Surviving Cancer
| |
| * | AOSC | Arundel Olympic Swim Center
| |
| * | AOSC | Alabama Office of the State Climatologist
| |
| * | AOSC | Athens Olympic Sports Complex
| |