P

PABX        Private Automatic Branch Exchange

PAD         Packet Assembly Disassembly

PAL         Phase Alternating Line

PAL         Programmable Array Logic

PAM         Partitioned Access Method

PAP         Password Authentication Protocol

PB          PetaByte (1,125,899,906,842,624 bytes)

PBX         Private Branch Exchange

PC          Personal Computer

PC          Personal Computing

PC          Program Control

PCB         Printed Circuit Board

PCB         Program Control Block

PCI         Peripheral Component Interface

PCI         Program Controlled Interuption

PCIL        Private Core Image Library

PCL         Printer Control Language

PCM         Plug Compatible Manufacturers

PCMCIA      Personal Computer Memory Card International Association

PCN         Personal Communication Network

PCP         Program Control Program

PCS         Personal Communication Services

PCT         Private Communication Technology

PCT         Program Control Table

PD          Public Domain

PDA         Personal Digital Assistant

PDAD        Proposed Draft Addendum

PDAU        Physical Data Access Unit

PDF         Program Development Facility

PDL         Page Description Language

PDO         Portable Distributed Objects

PDS         Partitioned Data Set

PDS         Premise Distribution System

PDS         Processor Direct Slot

PDU         Protocol Data Unit

PDX         Printer Description Extension

PE          Printer's error

PE          Protection Enabled

PEARL       Processor and Experiment Automation Realtime Language

PEM         Privacy Enhanced Mail

PEP         Partitioned Emulation Program

PER         Program Event Recording

PERL        Practical Extraction and Report language

PF          Parity Flag

PFK         Program Function Key(board)

PFM         Printer Font Metric

PGA         Professional graphics adapter

PGP         Pretty Good Privacy

PIB         Program Information Block

PID         Process ID

PIFS        Point InterFrame Space

PIM         Personal Information Management

PIN         Personal Identification Number

PIOCS       Physical Input/Output Control System

PL          Procedure Library

PL/1        Programming Language 1

PLI         Programming Language 1

PLPA        Pageable Link Pack Area

PLT         Program List Table

PLU         Primary Logical Unit

PMMU        Paged memory management unit

PMS         Pantone Matching System

PMS         Project Management System

PMT         Photomechanical Transfer (photostat)

PMT         Photomultiplier Tube

PNNI        Private Network-to-Network Interface

POC         Program-Operator Communication

POP         Point Of Presence

POP         Post Office Protocol

POSIX       Portable Operating System Interface for UNIX

POTS        Plain Old Telephone System

POWER       Priority Output Writer, Execution processors and input Readers

PP          Presentation Position

PPD         PostScript Printer Description

PPGA        Plastic Pin Grid Array

PPM         Pages Per Minute

PPP         Point-to-Point Protocol

PPT         Processing Program Table

PPTP        Point-to-Point Tunneling Protocol

PPV         Pay Per View

PRDMD       Private Directory Management Domain

PRL         Private Relocatable Library

PRMD        Private Management Domain

PROM        Programable Read Only Memory

PSB         Program Specification Block

PSDN        Packet Swiched Data Network

PSRAM       Pseudo SRAM

PSSL        Private Source Statement Library

PSTN        Public Swiched Telephone Network

PSW         Program Status Word

PTF         Program Temporary Fix

PTR         PoinTeR

PU          Physical Unit

PUB         Physical Unit Block

PVC         Permanent Virtual Circuit

PVP         Packet Video Processor

PWB         Printed Wire Board

PWS         Programmable WorkStation