Airspace Control Authority 
American Correctional Association 
American Counseling Association 
Agile Combat Aircraft 
Airlift Clearance Authority 
American Crystallographic Association 
Australian Communications Authority 
Army Contracting Agency 
Associate Contractor Agreement 
ACCRAFILTER 
Advanced Cargo Aircraft 
ADJACENT-CHANNEL ATTENUATION 
after contract award 
airspace coordination area 
Altitude Controller Assembly 
American Communication Association 
Amputee Coalition of America 
anti cardiolipin antibody 
Arms Control Association 
Associate Contractor's Agreement 
Asynchronous Communications Adapter 
Attitude Control Assembly 
Automatic Circuit Assurance 
Avaya Certified Associate 
Absolute Calibration Audit 
Adaptive Channel Allocation 
Advanced Computer Application 
Advanced Computer Applications 
Air Cargo Automation 
Air Clearance Authority