Procuring Contracting Officer 
Procurement Contracting Officer 
Program Controlled Output 
Point of Control and Observation 
Population Census Organization 
Primary Care Organisation 
Primary Control Officer 
Principal Contracting Officer 
Program Control Office 
Prospective Commanding Officer 
Pennsylvania College of Optometry 
Pest Control Operator 
Please Carry On 
Polar Cap Observatory 
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Primary Care Office 
Printing Control Officer 
Private Cable Operator 
Privy Council Office 
Procedure Change Order 
Procurement and Contracting Officer 
Procurement Contracting Office 
Procurement Contracting Officier 
Procuring Contracting Office 
Program Contracting Officer 
Property Control Officer 
Public Call Office 
Publications Control Officer 
Pacific Coastal Airline 
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