Club") Public Affairs Officer PAOK – (i) Panthessalonikeios Athlitikós Ómilos Konstantinoupoliton (Greek Πανθεσσαλονίκειος Αθλητικός Όμιλος Κωνσταντινοπολιτών, "Pan-Thessalonian Athletic Club of Constantinopolites") PAP – (i) People's Action Party (Singapore) PAPI – (a) Precision Approach Path Indicator (aviation) PAR – (s) Paraguay (IOC and FIFA trigram, but not ISO 3166) PARC – (a) Palo Alto Research Center PAROS – (a) Prevention of an Arms Race in Outer Space (treaty) PARP – (i) (NATO Partnership for Peace) Planning And Review Process PARWIG – (a) Power Augmented Ram Wing In Ground (aeroplane wing shape) PAS – See entry PASA – (i) PolyAmide, Semi-Aromatic (Nylon) PASGT – (i) Personnel Armor System, Ground Troops PASR – (i) Personnel Accounting and Strength Reporting PatD - (s) Panic! at the Disco PATH – (a) Port Authority Trans-Hudson PAWS (a) Phased Array Warning System Progressive Animal Welfare Society PAYD – (a) Pay As You Drive PAYE – (a) Pay As You Earn PB Pb – (s) Lead (Latin Plumbum) PB – (p) PolyButylene PBA (i) Philippine Basketball Association Professional Bowlers Association PBB – (p) PolyBrominated Biphenyl PBCK – (i) Problem Between Chair and Keyboard (computer help desk in-joke) PBD – (p) PolyButaDiene PBDE – (i) PolyBrominated Diphenyl Ether PBI – (p) PolyBenzImidazole PBIS - Positive Behavior Interventions and Supports PBN – (p) PolyButylene Naphthalate PBOH – (i) Please Become Old History PBR (i) Pabst Blue Ribbon (beer brand) Professional Bull Riders PBS (i) Pharmaceutical Benefits Scheme (Australia) Public Broadcasting Service (U.S.) Public Broadcasting Services (Malta) PBRT - may stand for: Physically Based Raytracing, an open source software rendering system for physically correct image synthesis. PBT – (p) PolyButylene Terephthalate PBX – (p) Private Branch eXchange (company phone system) PC pC – (s) picocoulomb PC (s) petacoulomb U.S. Pacific Islands Trust Territory (ISO 3166 digram; obsolete 1986) (i) Personal computer Player Character (roleplaying) Politically Correct / Political Correctness post cibum (Latin, "after meals") PCAS – (i) Planet-Crossing Asteroid Survey PCB – see entry PCC (i) NATO Partnership Coordination Cell Posterior Cingulate Cortex Pre-Command Course Presidents Conference Committee PCCB – (i) Porsche Ceramic Composite Brake PCCIP – (i) President's Commission on Critical Infrastructure Protection PCE – (p) PerChlorEthylene PCI (s) U.S. Pacific Islands Trust Territory (ISO 3166 trigram; obsolete 1986) (i) Peripheral Component Interconnect (computer bus) PCIe – (i) Peripheral Component Interconnect Express (computer bus) PCL – (i) Passive Coherent Location PCMCIA – (i) Personal Computer Memory Card International Association (People