Commission on Opticianry Accreditation 
Course of Action 
compair 
Certificate Of Authenticity 
Chart of Accounts 
coenzyme A 
Center for Operational Analysis 
Center Operations Area 
Central Operating Authority 
Certificate of Achievement 
Change of Address 
Change Over Acknowledge 
Change Over Acknowledgement 
Commission On Audit 
Commissioned Officers Association 
Comptroller of the Army 
Console Operations Area 
Construction Quality Assurance 
Contract of Affreightment 
Cost of Attendance 
Cryogenic Optical Assembly 
Current Operating Allowances 
California Optometric Association 
California Orthopaedic Association 
Canadian Orthopaedic Association 
Canadian Osteopathic Association 
Care Of Address 
Certificate of Approval 
Certificate Of Authorisation 
certificate of authorization