Post Office Protocol 
Proof of Principle 
Point of Purchase 
Parallel Ocean Program 
Program Operating Plan 
Point of Presence 
Perpendicular-to-Orbit Plane 
persistent organic pollutant 
Polar Orbiting Platform 
popliteal 
Period of Performance 
Power On/Off Protection 
Preburner Oxidizer Pump 
Preflight Operations Procedures 
Problem Oriented Policing 
Performance Oriented Packaging 
Perpendicular to Orbital Plane 
Personal Outcomes Project 
Picture Outside Picture 
Place of Performance 
plaster of paris 
polyoxypropylene 
Pop from Stack 
Population 
Production Order Processing 
Public Offering Price 
IATA code for Puerto Plata Airport, Sa… 
P5 and Oracle Package 
Package for Online Programming 
Pantex Ordnance Plant