P

• P-AR - Peak-to-Average Ratio
• p.c. - After food, from Latin, post cibum
• PA - posterior-anterior
• PA - Pulmonary artery
• PABX - Private Automatic Branch Exchange
• PAD - Packet Assembler-Disassembler
• PAF - Platelet activating factor
• PAL - Phase Alternate Line
• PAM - Pluggable Authentication Modules
• PAM - Pulse Amplitude Modulation
• PAO - Peak Acid Output
• PAP - Papanicolaou stain
• PAP - Password Authentication Protocol
• PAR - Positive Acknowledgement + Retransmission
• PAT - Paroxysmal atrial tachycardia
• PAT - Port Address Translation
• PBB - Poly-Brominated Biphenyls
• PBDE - PolyBrominated Diphenyl Ethers
• PBX - Private Branch eXchange
• PCG - Protein Crystal Growth
• PCI - Peripheral Component Interconnect
• PCI - Peripheral Component Interconnect or Interface
• PCI - Protocol Control Information
• PCL - Printer Control Language
• PCM - Polarizable Continuum Model
• PCM - Pulse Code Modulation
• PCMCIA - Personal Computer Memory Card Internation Association
• PCN - Path Control Network
• PCOS - Polycystic ovarian syndrome
• PCP - Pneumocystis carinii pneumonia
• PCR - Peak Cell Rate
• PCR - Polymerase chain reaction
• PCS - Polymer Clad Silica
• PCVS - Point to Point Switched Virtual Connections
• PDA - Patent ductus arteriosus
• PDA - Personal Digital Assistant
• PDC - Primary Domain Controller
• PDE - Phosphodiesterase
• PDF - Portable Document Format
• PDH - Plesiochronous Digital Hierarchy - comment
• PDI - Personal Data Interchange
• PDN - Public Data Network
• PDT - Photodynamic Therapy
• PDT - Printer Definition Tables
• PDU - Packet Data Unit
• PDU - Protocol Data Unit
• PEEP - Positive end expiratory pressure
• PEF - Peak expiratory flow
• PEFR - Peak expiratory flow rate
• PEL - Picture Element
• PERL - Practical Extraction and Report Language
• PET - PolyEthylene Terephthalate
• PET - Positron-emission tomography
• PFM - Pulse Frequency Modulation
• PGI - Parameter Group Identifier
• PGP - Pretty Good Privacy
• PHP - Personal Home Page
• PHY - FDDI physical sub layer
• PIC - Picture File
• PID - Pelvic inflammatory disease
• PIM - Protocol Independent Multicast
• PIN - Personal Identification Number
• PINE - Program for Internet News and E-mail
• PINFET - PIN photodiode Field Effect Transistor
• PING - Packet Internet Gopher
• PIXEL - Picture Cell
• PKA - Protein kinase A
• PKI - Public Key Infrastructure
• PKU - Phenylketonuria
• PLCP - Physical Layer Convergence Procedure
• PLL - Phase Locked Loop
• PLT - platelets
• PLU - Primary Logical Unit
• PM - Phase Modulation
• PM - Prime Minister
• PMO - Project Management Office
• PMR - Percutaneous Myocardial Revascularisation
• PNG - Portable Network Graphics
• PNP - Plug And Play
• PNP - Private Numbering Plan
• PO - Profit Objective
• POE - Power Over Ethernet
• POJO - Plain Old Java Objects
• POP - Point of Presence
• POP - Post Office Protocol
• POP3 - Post Office Protocol Version 3
• POS - Point-Of-Sale
• POTS - Plain Old Telephone Service
• POX - Peroxidase
• PPGA - Plastic Grid Pin Array
• PPM - Page(s) Per Minute
• PPM - Pulse Position Modulation
• PPN - Public Packet Network
• PPNI - Private Network-to-Network Interface
• PPP - Pay Per View
• PPP - Point to Point Protocol
• PPRS - Pharmaceutical Price Regulatory Scheme
• PPTP - Point to Point Tunneling Protocol
• PQA - Palm Query Application
• PRA - Plasma renin activity
• PRI - Primary Rate Interface
• PRIND - Prolonged Reversible Ischemic Neurologic Deficit
• PROFS - Professional Office System
• PROM - Premature Rupture of Membranes
• PROM - Programmable Read Only Memory
• PS - Packet Switch
• PS2 - Personal System / 2
• PS3 - Play Station 3
• PSA - Prostatic specific antigen
• PSDN - Packet-Switched Data Network
• PSN - Packet Switch Node
• PSP - Phenylsulphtalein
• PSTN - Public Switched Telephone Networks
• PT - Prothrombin time
• PTA - Percutaneous Transluminal Angioplasty
• PTCA - Percutaneous transluminal coronary angioplasty
• PTH - Parathyroid hormone
• PTI - Packet Type Indication
• PTR - Pointer Reverse
• PTT - Partial thromboplastin time
• PUVA - Psoralen UV A
• PV - Photo Voltaic
• PVC - Permanent Virtual Circuit
• PVR - Pulmonary Vascular Resistance
• PWP - Pulmonary Wedge Pressure
• PXE - Pre-boot Execution Environment