Airborne Collision Avoidance System 
Aircraft Collision Avoidance System 
Airborne Collision Avoidance Systems 
Application Control Architecture Servi… 
Advisory Conciliation and Arbitration… 
Airborne Collision-Avoidance System 
Associate of the Casualty Actuarial So… 
Aged Care Assessment Services 
Airspace Coordination Areas 
Asymptomatic Carotid Atherosclerosis S… 
Access Charge Analysis System 
adenocarcinomas 
adrenocortical adenomas 
adult children of alcoholics 
Advisory Committee for Atmospheric Sci… 
African Commission on Agricultural Sta… 
Air Collision Avoidance System 
Airbone collision avoidance system 
Aircraft Collision Avoidance Systems 
Airlift Clearance Authorities 
American Capital Strategies, Ltd. 
anterior cerebral arteries 
anticardiolipin antibodies 
anticentromere antibodies 
Army Commissary Automated System 
Army Crisis Action System 
asymptomatic carotid artery stenosis 
Asymptomatic Carotid Atherosclerotic S… 
Automated Collision Avoidance System 
Automotive Collision Avoidance Systems