P...

• P3P Platform for Privacy Preferences Project
• PAB Personal Address Book
• PABX Private Automatic Branch Exchange
• PACE Priority Access Control Enabled [3Com]
• PACS Picture Archiving and Communication System
• PACS-L Public Access Computer Systems List [Internet]
• PAD Packet Assembler/Disassembler
• PADS Pen Application Development System [Slate Corporation]
• PAIH Public-Access Internet Host [Internet]
• PAIS Public-Access Internet Site [Internet]
• .PAK Packed (compressed file name extension) [NoGate
• Consulting]
• PAL Paradox Applications Language [Borland] + Phase Alternating Line + Programmed Array Logic + Programming Assembly Language
• .PAL Palette (file name extension)
• PALC Plasma-Addressed Liquid Crystal (display)
• PALS Principles of the Alphabet Literacy System
• PAM Pluggable Authentication Module (library) + Pulse Amplitude Modulation
• PAN Personal Area Network [GTE]
• PAP Packet-level Procedure + Password Authentication Protocol + Printer Access Protocol
• PAR Personal Animation Recorder + Parallel
• PARA Paragraph
• PARC Palo Alto Research Center [XEROX]
• PA-RISC Precision Architecture-RISC [HP]
• .PAS PASCAL source code (file name extension)
• PASCAL (Programming Language named for Blaise Pascal)
• PAT Port Address Translation
• .PAT Patch + Pattern (file name extensions)
• PATN Promotional Port Access Telephone Number
• PAX Portable Archive Exchange [Unix]
• PB Petabyte (1,024 terabytes)
• (One Million Billion characters of information)
• PBA Printed Board Assembly
• PBC Plain-Text Block Chaining
• PBE Prompt By Example
• PBGA Plastic Ball Grid Array
• PBR Policy-Based Routing [Cisco]
• PBX Private Branch Exchange
• PC Personal Computer + Printed Circuit + Program Counter
• PCACIAS Personal Computer Automated Calibration Interval
• Analysis System
• PCB Printed Circuit Board + Program Control Block
• PCBC Plain/Propagating Cipher Block Chaining
• PCC Proof Carrying Code
• PCD Photo Compact Disk
• PC-DOS Personal Computer - Disk Operating System [IBM]
• PCEB PCI to EISA Bridge [Intel]
• PCI Peripheral Component Interconnect/Interface
• PCIC PC-Card Interrupt Controller
• PC-I/O Program Controlled I/O
• PCL Printer Command Language [HP] + Process Control Language
• PCM Personal Computer Manufacturer + Printer Cartridge Metric [HP] + Pulse Code Modulation
• PCMA Paired Carrier Multiple Access
• PCMC PCI, Cache, Memory Controller [Intel]
• PCMCIA Personal Computer Memory Card International Association
• PCMIM Personal Computer Media Interface Module
• PCN Personal Computer Network
• PCNFS Personal Computer Network File System
• PCO Point of Control and Observation
• PCS Patchable Control Store + Personal Communication Services/System + Personal Conferencing Specification + Planning Control Sheet + Print Contrast Signal + Process Control Systems + Program Counter Store + Project Control System
• PCT Private Communications Technology
• .PCT Picture (file name extension)
• .PCX Picture Image (file name extension)
• PD Phase-Change Dual + Public Domain
• PDA Personal Digital Assistant
• .PDB Palm Database (file name extension) + Program Database (file name extension)
• PDC Primary Domain Controller
• PDD Physical Device Driver + Portable Digital Document
• PDF Package Definition File + Portable Document Format + Portable Document File + Processor Defined Function + Program Development Facility
• .PDF Printer Description (file name extension)[Borland,Lotus]
• PDH Plesiosynchronous Digital Hierarchy
• PDIAL Public Dialup Internet Access List [Internet]
• PDL Page Description Language + Program Description Language
• + Program Design Language
• PDM Product Data Management
• PDN Public Data Network
• PDO Portable Distributed Objects [Next]
• PDP Parallel Data Processing + Plasma Display Panel + Programmable Data Processor + (DEC Computer System Designation, i.e. PDP-8, PDP-11)
• PDS Packet Driver Specification + Partitioned Data Set + Planetary Data System + Portable Document Software + Processor Direct Slot [Macintosh]
• PDSS Post Development and Software Support
• PDT Performance Diagnostic Tool [IBM] + Programmable Drive Table
• PDU Plug Distribution Unit + Protocol Data Unit
• .PDX Paradox files (file name extension) [Borland] + Printer Description Extension (file name extension)
• PE Parity Even + Processing Element + Protect Enable
• PEA Pocket Ethernet Adapter
• PEL Picture Element [IBM]
• PEM Privacy-Enhanced Mail [Internet]
• PEN SDK Pen Computing Software Development Kit
• PEP Packet Exchange Protocol + Packetized Ensemble Protocol [Telebit]
• PERC Power Edge RAID Controller
• PERL Practical Extraction and Report Language [Unix]
• PERT Program Evaluation and Review Technique
• PES Positioning Error Signal + Processor Enhancement Socket
• Processor Upgrade Socket
• PET Print Enhancement Technology [Compaq]
• .PFB Printer Font Binary (file name extension)
• PFE Programmer's File Editor
• .PFM Printer Font Metrics (file name extension) [Windows]
• PFN Page Frame Number
• PFR Portable Font Resource + Power-Fail Restart
• PGA Pin Grid Array + Professional Graphics Adapter [IBM]
• PGC Program Group Control [Microsoft]
• PGDN Page Down
• .PGL Graphics (file name extension) [Hewlett-Packard]
• PGM Program
• PGML Precision Graphics Markup Language
• PGP Pretty Good Privacy (name of encryption program)
• .PGP ProGram Parameter (file name extension) [AutoCAD]
• PGUP Page Up
• PHF Perfect Hash Function
• PHIGS Programmers' Hierarchical Interactive Graphics
• Standards
• .PHO Phone List (file name extension)
• PHP Personal Home Pages (original name of this programming
• language, now known as PHP Hypertext Preprocessor)
• PHS Personal Handyphone System
• PI Program Interruption
• PIA Peripheral Interface Adapter
• PIC Personal Information Carrier + Personal Intelligent Communicator + Platform for Internet Content + Priority Interrupt Controller + Program Interrupt Controller
• PICS Platform for Internet Content Selection [W3C]
• PICT Picture
• PID Process Identification Number + Product ID + Proportional, Integral, Derivative
• PIER Procedures for Internet/Enterprise Renumbering
• PIF Picture Interchange Format File + Program Information File
• PII Program Integrated Information
• PILOT Programmed Inquiry Learning Or Teaching
• PilotACE* Pilot Automatic Computing Engine
• PIM Personal Information Manager + Primary Interface Module + Protocol-Independent Multicast
• PIN Personal Identification Number + Process Identification Number [Unix]
• PINE Pine Is Not Elm (original usage) + Program for Internet News & Email (present usage)
• PING Packet Internet Groper
• PIO Parallel Input/Output + Processor Input/Output + Programmed Input/Output
• PIP Pattern and Information Processing + Picture In Picture + Problem Isolation Procedure + Programmable Interconnect Point
• PIPO Parallel In, Parallel Out
• PIR Protocol Independent Routing
• PIT Programmable Interval Timer
• PIXEL Picture Element
• PJPEG Progressive JPEG
• PK Primary Key
• PKC Public Key Cryptography
• PKI Public Key Infrastructure
• PL Plus
• .PL Perl Language (file name extension)
• PLA Programmable Logic-Array
• PLATO Programmed Logic for Automatic Teaching Operations
• PLC Programmable Logic Controller
• PLCC Plastic Leadless Chip Carrier
• PLD Programmable Logic Device
• PLDS Pilot Land Data System [NASA]
• PLL Phase Locked Loop
• .PLL Prelinked Library (file name extension) [Clipper]
• PL/M Programming Language for Micros
• PLS Primary Link Station
• PLV Production Level Video
• PL/1 * Programming Language One
• PM Presentation Manager [IBM] + Preventative Maintenance + Process Manager
• .PM6 PagerMaker6 (file name extension) [Corel]
• P-MAIL Paper Mail
• PMD Packet Mode Data
• PMMU Paged Memory Management Unit
• PMOS Positive Channel Metal Oxide Semiconductor
• PMR Problem Management Report [IBM]
• PMS Policy Management System
• PN Processing Node
• P/N: Part Number
• PNA Programmable Network Access
• PNG Portable Network Graphics
• PNNI Private Network-to-Network Interface
• PNP Plug And Play
• PO Parity Odd
• POA Portable Object Adapter
• POC Point Of Contact
• POC-IT Point Of Care-Information Technology [Johns Hopkins]
• POD Piece Of Data + Plain Old Documentation [Perl] + Plain Old Dos + Publishing On Demand
• POE Power Open Environment
• POH Power-On Hours
• POL Problem Oriented Language
• POP Point Of Presence + Pop from Stack + Post Office Protocol
• POP3 Post Office Protocol, Version 3
• POPA Pop All Registers
• POPF Pop Flags
• POR Power-On-Reset
• POS Packet Over Sonet + Point of Sale + Positive + Programmable Object Select
• POSE Palm Operating System Emulator
• POSIX Portable Operating System Interface for Unix
• POST Power-On Self Test
• POSTNET Postal Numeric Encoding Technique (bar code)
• POTS Plain Old Telephone Service + Plain Old Time-Sharing
• POWER Performance Optimization with Enhanced RISC [IBM]
• PowerPC Performance Optimization with Enhanced RISC-Performance
• Computing
• PP Parallel Port
• P2P Peer To Peer + People To People
• P3P Platform for Privacy Preferences
• PPA Pixel Processing Accelerator
• .PPD PostScript Printer Description (file name extension)
• PPDS Personal Printer Data Stream [IBM]
• PPGA Plastic Pin Grid Array
• PPI Precise Pixel Interpolation
• PPM Pages Per Minute
• PPP Point-to-Point Protocol [Internet]
• PPPOE Point-to-Point Protocol Over Ethernet
• PPS Packets Per Second + Power Personal Systems [IBM]
• PPTP Point-to-Point Tunneling Protocol [Microsoft]
• PQA Palm Query Application
• PQFP Plastic Quad Flat Pack
• PQO Parallel Query Option
• PRACSA Public Remote Access Computer Standards Association
• PRAM Parallel Random-Access Machine + Parameter Random Access Memory
• .PRC Pilot Resource (file name extension) [Palm Pilot]
• .PRD Printer Driver (file name extension) [Microsoft]
• PRE Preformatted [HTML]
• PREP Power PC Reference Platform [IBM/Motorola]
• PRF Pulse Repetition Frequency
• .PRF Preferences (file name extension) [Grammatik IV]
• .PRG Program (file name extension)
• PRI Primary-Rate Interface
• PRINTF Print with Formatting [C Programming Language]
• PRISM Photo-Refractive Information Storage Material
• .PRJ Project (file name extension) [Borland]
• PRMD Private Management Domain [X.400]
• PRML Partial-Response Maximum-Likelihood
• .PRO Professionals (Domain Name) [Internet] + Profile (file name extension)
• PROC Procedure
• PROFS Professional Office System [IBM]
• PROG Program + Programmer
• PROLOG Programming In Logic (Programming Language)(See HLL)
• PROM Programmable Read Only Memory
• PRN Printer
• PRNG Pseudo-Random Number Generation (algorithm)
• .PRS Printer (file name extension) [WordPerfect]
• PRTSC Print Screen
• PS Proportional Spacing
• .PS PostScript (file name extension)
• PS/2 Programming System 2 [IBM]
• PSAPI Presentation Space Application Programming Interface
• PSC Personal Super Computer + Print Server Command + Product Service Center
• PSDN Packet-Switched Data Network
• PSDS Packet-Switched Data Service
• PSERVER Print Server [NetWare]
• PSF Permanent Swap File
• PSID PostScript Image Data
• PSINET (formerly Performance Systems International)
• PSM Printing Systems Manager
• PSN Packet Switching Network + Processor Serial Number
• PSP Personal Software Products (group) [IBM] + Program Segment Prefix
• PSPDN Packet-Switched Public Data Network
• PSRAM Pseudo-Static Random Access Memory
• PSRT PostScript Round Table [GEnie]
• PSS Process Status Structure
• PSTN Public Switched Telephone Network
• PSU Power Supply Unit
• PSW Program Status Word
• .ps.Z Compressed PostScript (file name extension) [Unix]
• PT Page Table
• P/T Part Time
• PTD Parallel Transfer Disk Drive
• PTE Page Table Entry
• PTF Problem Temporary/Trouble Fix [IBM]
• PTH Plated Through Hole
• PTI Packet Type Identifier
• PTT Postal Telephone & Telegraph
• PUB Public (directory) [Internet] + Publish
• .PUB Publication (file name extension) [Ventura]
• PUN Physical Unit Number
• PUP PARC Universal Packet (protocol)
• PURL Persistent URL
• PUS Processor Upgrade Socket
• PUSHA Push All Registers
• PUSHF Push Flags
• PVC Permanent Virtual Circuit + Polyvinyl Chloride
• PVM Parallel Virtual Machine + Pass-through Virtual Machine (protocol) [IBM]
• PVP Parallel Vector Processing
• PVR Personal Video Recorder
• PVS Parallel Visualization Server
• PW Password
• PWB Printed Wire Board + Programmer's Workbench [Microsoft]
• PWD Print Working Directory [Unix]
• PWR Power
• PWSCS Programmable Workstation Communication Services [IBM]
• .PX Primary Index (file name extension) [Paradox]