P

PABX

Private Automatic Branch eXchange

PACS

Personal Access Communications Services/System

PAD

Packet Assembler Disassembler (X.3,X.25)

PAL

Phase Alternating Line (TV)

PAL

Programmable Array Logic

PAM

Pulse Amplitude Modulation

PAMR

Public Access Mobile Radio (SMR)

PAP

Password Authentication Protocol

PAX

Private Automatic eXchange

PBA

Printed Board Assembly

PBX

Private Branch eXchange

PC

Personal Computer

PC

Program Counter

PCB

Printed Circuit Board

PCCA

Portable Computer and Communications Association

PCI

Protocol Control Information

PCI

Peripheral Components Interconnect (bus)

PCM

Pulse Code Modulation

PCMCIA

Personal Computer Memory Card International Association

PCN

Personal Communications Network (Europe)

PCS

Personal Communications Services (USA)

PCSN

Private Circuit Switching Network

PDA

Personal Digital Assistant

PDC

Personal Digital Cellular (Japan)

PDF

Portable Document Format

PDFA

Praseodymium Doped Fiber Amplifier

PDH

Plesiochronic Digital Hierarchy

PDMA

Polarization Division Multiple Access

PDN

Public Data Network

PDS

Processor Direct Slot

PE

PolyEthylene

PECC

Partially Error Controlled Connections

PERL

Practical Extraction and Report Language

PERM

Pre-Embossed Rigid Magnetic

PERT

Program Evaluation and Review Technique

PET

Positron Emission Tomography

PHIGS

Programmer's Hierarchical Interactive Graphics System

PHS

Personal Handy phone System (Japan)

PIA

Programmable Interface Adapter

PICS

Platform for Internet Content Selection

PID

Proportional Integral Differential

PIKS

Programmer's Imaging Kernel System

PIN

Personal Identification Number

PIN

Positive Intrinsic Negative (Diode)

PING

Packet INternet Grouper (RFC-792)

PIV

Peak Inverse Voltage

PKC

Public Key Criptosystem

PL/1

Programming Language (version) 1

PLA

Programmable Logic Array

PLC

Power Line Carrier

PLC

Programmable Logic Controller

PLCC

Plastic Leadless Chip Carrier

PLD

Programmable Logic Device

PMPO

Peak Music Power Output

PMOS

Positive Metal Oxide Silicon

PMR

Public/Private (?) Mobile Radio

PMU

Phasor Measurement Unit

PNNI

Private Network to Network Interface

PNP

Positive-Negative-Positive

PON

Passive Optical Network

POP

Point Of Presence

POP

Post Office Protocol (RFC 1125)

POS

Point of Sale

POSIX

Portable Operating System Interface (IEEE)

POTS

Plain Old Telephone Service

PPD

Postscript Printer Description

ppm

Parts Per Million

PPP

Point to Point Protocol

PPS

Packets Per Second

PQFP

Plastic Quad Flat Pack

PRA

Primary Rate Access (2Mb/s - ISDN)

PRI

Primary Rate Interface (ISDN)

PROM

Programmable Read-Only Memory

PS

Post Script

PSDN

Packet Switched Data Network

PSI

Packet Switched Interface (DEC)

PSI

Peripheral System Interconnect

psi

Pounds per Square Inch

PSK

Phase Shift Keying

psRAM

Pseudo Static Random Access Memory

PSTN

Public Switched Telephone Network

PSW

Processor Status Word

PTB

Phisikalisch-Technische Bundesanstalt (Braunschweig)

PTC

Positive Temperature Coefficient

PTM

Packet Transfer Mode

PTM

Pulse Time Modulation

PTP

Peak To Peak (voltage)

PTT

Post, Telegraph and Telephone

PU

Per Unit

PV

Photo Voltaic

PVC

Permanent Virtual Circuit/Connection

PVC

Poly Vinyl Chloride

PVQ

Pyramid Vector Quantization (codification)

PWM

Pulsed Wave Modulation

PWM

Pulse-Width Modulation