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