Certified Annuity Specialist 
Close Air Support 
Chemical Abstracts Service 
Certification Authorities 
Channel Associated Signaling 
Cost Accounting Standards 
Contract Administration Services 
Country Assistance Strategy 
Chemical Abstract Service 
Column Address Strobe 
Channel Associated Signalling 
Calibrated Air Speed 
Central Accounting System 
Commission for Atmospheric Sciences 
Casualty 
Casualty Actuarial Society 
Centralized Attendant Service 
Chinese Academy of Sciences 
Collision Avoidance System 
Computerized Autodial System 
Communicating Applications Specificati… 
Control Actuation Section 
Control Augmentation System 
Calibrated Ancillary System 
Call Accounting System 
casting numbers 
Central Alarm Station 
Content Addressable Storage 
Cost Accounting Standard 
Centralized Attendant Services