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OASOrganization of American States
OASOffice of Applied Studies (SAMHSA)
OASOracle Application Server
OASOption Adjusted Spread
OASOffice of the Assistant Secretary
OASOral Allergy Syndrome
OASOrganisation Armée Secrète
OAS2'-5' oligoadenylate synthetase
OASOld Age Security Act (Canada)
OASOffice Automation System
OASOffice of Administrative Services
OASOffice of Aircraft Services
OASOrganization of Agreement States
OASOffensive Air Support
OASOffensive Avionics System
OASOman Aviation Services
OASOpen Airways for Schools
OASOnline Auction Site
OASOn Another Subject
OASOrganizational Assessment Survey
OASOphthalmic Anesthesia Society
OASOrganization of African States
OASOffice of Aerospace Studies
OASObstacle Avoidance Sonar
OASOnline Account Services
OASObstacle Avoidance System
OASOptical Access Switch (Quantum)
OASOceanic Automation System
OASOptical Answer Sheet
OASOptical Automation Systems (Continuum Photonics)
OASOnizuka Air Station (USAF)
OASOptical Amplifier Section
OASOperations Automation System
OASOwner Activity Statement
OASOutsourcing Advisory Service
OASOriginating AT&T Switch
OASOrbiter Attachment System
OASOperator Administration System (Bellcore)
OASOperation After Suspension
OASOptically Activated Semiconductor
OASOmnidirectional Airspeed Sensor
OASOracle Advanced Scheduler
OASOnline Application System (various organizations)
OASOpen-Architecture-System (computing)
OASOn-Access Scan (McAfee, Inc.)
OASOnline Assessment System (software)
OASOffice Automation Software
OASOffice of Academic Services (various schools)
OASOracle Advanced Security (software)