Clean Air Act Commonwealth Association of Architects Civil Aviation Authority Concepts Analysis Agency Center for Army Analysis Civil Aeronautics Authority Civil Aeronautics Administration Computer Aided Analysis CLAAS Combined Arms Army Contaminant Analysis Automation Controlled Access Area California Autobody Association Canadian Acoustical Association Central Arid Asia Certified Annuity Advisor civil air augmentation Civil Aviation Authorities Cluster Active Archive Collinear Antenna Array Command Arrangement Agreement Command Arrangement Agreements Community Action Agency Compliance Assurance Agreement Computer-Assisted Assessment Conditional Access Authority Conference of American Armies Council on Aviation Accreditation Criticality alarm annunciator Atlantic Southeast Airlines