Office of Pesticide Programs 
Organizational Process Performance 
Office of Polar Programs 
Object Push Profile 
opposite 
Octal Print Punch 
Office of Pesticides Programs 
Open Position Protocol 
Opportunity 
Order Processing Pipeline 
orderwire patch panel 
Organophosphate poisoning 
OSVS Patch Panel 
Other People's Problems 
Observation Products Panel 
octaprenyl pyrophosphate 
ocular perfusion pressure 
Office of Plans and Policy 
Office of Plans and Programs 
Office of Policy and Planning 
Office of Pollution Prevention 
officer professionalism program 
Offload Preparation Party 
Off-Load Preparation Party 
Off-peak power 
oligopeptide permease 
oligopeptide transport system 
oncovin, procarbazine, prednisone 
Ontario Provincial Police 
Operating Permits Program