Chief Petty Officer 
Commodity Pool Operator 
Civilian Personnel Office 
Climate Program Office 
Chief Post Office 
Compulsory Purchase Order 
Corrections Program Office 
Central Procurement Office 
Certified Project Officer 
Certified Prosthetist-Orthotist 
Chemical Protection Overgarment 
Chief Privacy Officer 
Civilian Personnel Officer 
CODE PRACTICE OSCILLATOR 
Command Pulse Output 
complete provisions only 
Consolidated Payroll Office 
Contract Purchase Order 
Core Project Office 
Canada Post Office 
Canadian Passport Office 
cardiac power output 
cardiogenic pulmonary oedema 
Care Plan Oversight 
Catalytic Partial Oxidation 
cefpirome 
Central Pay Office 
Central Policy Office 
central post office 
Centre de Programmation de L'OTAN