Public Buildings Service 
Public Broadcasting System 
Primary Base Series 
Public Broadcasting Service 
Peak Burst Size 
Portable Batch System 
Personal Base Station 
phosphate buffer saline 
Product Breakdown Structure 
Project breakdown structure 
Packed Bed Scrubber 
painful bladder syndrome 
Pharmaceutical Benefits Scheme 
phosphate buffer solution 
Phosphate Buffered Saline 
Polarization Beam Splitter 
Portfolio Budget Statements 
Positive Behavior Support 
Power Bus Simulator 
President's Budget Submission 
pressure boundary subsystem 
Production Base Support 
Program for Biosafety Systems 
Project baseline summary 
Protective Breathing System 
Public Broadcast System 
Pacific Biological Station 
Pakistan Bureau of Statistics 
Palladium-Barium Sulfate 
papillary bleeding score