Portable Object Adapter 
Provisional Operating Authorization 
Pilot Operated Absolute 
Plan of Action 
Pacific Ocean Areas 
Place of acceptance 
Portable Object Adaptor 
Privately Owned Aircraft 
Program Office Approvals 
IATA code for Salgado Filho Internatio… 
pancreatic oncofetal antigen 
Partial Order Alignment 
Pay on Arrival 
Payload ORU Accommodation 
Payment On Account 
Peierls-Onsager approxn. 
Pennsylvania Optometric Association 
Petroleum Operating Agreement 
phenoxyacetic acid 
Piedmont Oncology Association 
plain old ACARS 
Plan Of Attack 
Plant operating authority 
Point of Acquisition 
Point of Action 
Point Of Arrival 
Point of Attachment 
Port Outboard Aft 
Portuguese Army 
Position Organization Address