P

Provider router (org/ietf/ppvpn)

P-GW

Packet Gateway (org/3gpp/4g)

P-MAC

Packet Media Access Control (org/ansi/fddi)

P2C/C2P

PCI to CPU / CPU to PCI (ict/comp/bios)

P2CC2P

PCI to CPU / CPU to PCI (ict/comp/bios)

P2P

Peer-to-Peer (ict/net)

PA

Preamble (org/ieee/ethernet/frame)

PaaS

Platform as a Service (ict/cloud)

PABX

Private Automatic Branch Exchange (ict/net)

PACE

Priority Access Control Enabled (org/ieee/ethernet)

PAD

Padding (org/ieee/ethernet/frame)

PAD

Packet Assembler / Disassembler (org/itu)

PAP

Password Authentication Protocol (org/ietf)

PAR

Project Authorisation Request (org/ieee)

PAS

Publicly Available Specifications (org/iso)

PBB

Provider Backbone Bridge (org/ieee/802)

PBX

Private Branch Exchange (ict/net)

PC

Personal Computer (ict/comp)

PC

Packet Core (org/3gpp/3g)

PC-DOS

Personal Computer DOS (com/us/ibm)

PCA

Policy Certification Authority (ict/security)

PCI

Peripheral Component Interconnect (ict/comp)

PCI

Protocol Control Information (org/itu/x200)

PCIM

Policy Core Information Model (org/ietf/policy)

PCM

Physical Connection Management (org/ansi/fddi)

PCMCIA

People Can’t Memorize Computer Industries Acronyms (jargon)

PCR

Processor Configuration Register (ict/comp/cpu)

PCR

Peak Cell Rate (org/itu/atm)

PCRW

Phase Change ReWritable (ict/comp/dvd)

PCS

Physical Coding Sub-Layer (org/ieee/ethernet)

PDA

Personal Digital Assistant (ict/device)

PDC

Primary Domain Controller (com/us/microsoft/ad)

PDCP

Packet Data Convergence Protocol (org/3gpp)

PDCP

Packet Data Convergence Protocol (org/3gpp/4g)

PDF

Portable Document Format (org/iso)

PDH

Plesiochronous Digital Hierarchy (org/itu/atm)

PDM

Product Data Management (biz)

PDM

Policy Domain Model (com/se/ericsson/nm-lab/upt)

PDM-DSL

Policy Domain Model DSL (com/se/ericsson/nm-lab/upt)

PDM-Tpl

Policy Domain Model Template (com/se/ericsson/nm-lab/upt)

PDM-UML

Policy Domain Model UML (com/se/ericsson/nm-lab/upt)

PDP

Policy Decision Point (org/ietf/policy)

PDU

Protocol Data Unit (org/itu/x200)

PE

Provider Edge (org/ietf/ppvpn)

PE

Protocol Entity (org/ietf/snmp)

PEA

Pocket Ethernet Adapter (org/ieee/ethernet)

PEBCAK

Problem Exists Between Chair And Keyboard (jargon)

PEBKAC

Problem Exists Between Keyboard And Chair (jargon)

PEP

Performance Enhancing Proxy (org/ietf)

PEP

Policy Enforcement Point (org/ietf/policy)

PEP2

Performance Enhancing Proxy 2 (org/ietf)

PER

Packed Encoding Rules (org/itu/x600)

PES

Proposed Encryption Standard (ict/security)

PFA

Predictive Failure Analysis (ict/comp/hdd)

PFE

Proudly Found Elsewhere (jargon)

PFSM

Probabilistic Finite State Machine (ict/concept)

PGA

Pin Grid Array (ict/comp/cpu)

PGA

Patches Gratefully Accepted (jargon)

PGC

ProGram Chain (ict/comp/dvd)

PHP

PHP Hypertext Preprocessor (ict/lang)

PHY

Physical Layer (ict/net)

PHY

Physical Layer (org/ieee/802)

PHY

Ethernet Physical Layer (org/ieee/ethernet)

PIB

Policy Information Base (org/ietf/policy)

PIC

Point in Call (org/itu/q1200)

PID

Process IDentification number (ict/os/unix)

PIF

Parity Inner Failure (ict/comp/dvd)

PINT

PSTN INTernet Interworking (org/ietf)

PISW

Process Interrupt Status Word (ict/lang/assembler)

PITA

Pain In The Anatomy / Ass (jargon)

PK

Public Key (ict/security)

PKI

Public Key Infrastructure (org/itu/x500)

PKIX

Public Key Infrastructure X.509 (org/itu/x500)

PL

Physical Layer (org/itu/x200)

PL-OU

Physical Layer Overhead Unit (org/itu/atm)

PL-Tr

Policy Language Transformation Rule (com/se/ericsson/nm-lab/upt)

PLCP

Physical Layer Convergence Protocol (org/itu/atm)

PLCP

Physical Layer Convergence Procedure (org/itu/atm)

PLMN

Public Land Mobile Network (ict/net/mobile)

PLONK

Please Leave Our Newsgroup, Kid (jargon)

PLS

Physical Signalling Sub-layer (org/ieee/ethernet)

PM

Policy Model (com/se/ericsson/nm-lab/upt)

PM

Protected Mode (ict/comp/cpu)

PM

Port Multiplier (ict/comp/hdd/sata)

PM

Performance Management (ict/net/mgmt)

PM-DSL

Policy Model DSL (com/se/ericsson/nm-lab/upt)

PM-DSL-Tr

Policy Model DSL Transformation Rule (com/se/ericsson/nm-lab/upt)

PM-Tpl

Policy Model Template (com/se/ericsson/nm-lab/upt)

PM-UML

Policy Model UML (com/se/ericsson/nm-lab/upt)

PMA

Physical Medium Attachment (org/ieee/ethernet)

PMD

Physical (layer) Medium Dependent (org/ansi/fddi)

PMD

Physical layer, Medium Dependant (org/itu/atm)

PME

Power Management Event (ict/comp/bios)

PMJI

Pardon Me for Jumping In (jargon)

PMK

Pairwise Master Key (ict/security)

PMP

Point to MultiPoint (org/itu/atm)

PNA

Patterns in Network Architecture (people/day-john)

PNF

Physical Network Function (org/etsi/nfv)

PNG

Portable Network Graphics (org/ietf)

PNNI

Private Network Node Interface (org/itu/atm)

PNPBIOS

Plug and Play BIOS (ict/comp/bios)

POA

Point Of Attachment (org/psoc/rina)

POC

Proof of Concept (biz)

POEP

Primary Operand Execution Pipeline (ict/comp/cpu)

POF

Parity Outer Failure (ict/comp/dvd)

POI

Point Of Interaction (org/itu/q1200)

POJI

Plain Old Java Interfaces (ict/lang/java)

POJO

Plain Old Java Object (ict/lang/java)

PolaaS

Policy as a Service (ict/net/mgmt)

PON

Passive Optical Network (ict/net/optical)

POP

Point Of Presence (ict/net)

POP3

Post Office Protocol 3 (org/ietf)

POR

Power-On Reset (ict/comp/bios)

POR

Point Of Return (org/itu/q1200)

POS

Piece Of Shit (jargon)

POSIX

Portable Operating System Interface (ict/os)

POSIX

Portable Operating System for unIX (ict/os/unix)

POSTECH

Pohang University of Science and Technology (edu/kr)

POTS

Plain Old Telephone System (jargon)

PP

Physical Plane (org/itu/q1200)

PPB

Push Pull Before (ict/comp/dvd)

PPB-DV

Push Pull Before (ict/comp/dvd)

PPDU

Presentation Protocol Data Unit (org/itu/x200)

PPGA

Plastic Pin Grid Array (ict/comp/cpu)

PPID

Parent Process IDentification number (ict/os/unix)

PPP

Point to Point Protocol (org/ietf)

PPPOE

Point-to-Point Protocol Over Ethernet (org/ietf/ppp)

PPPoED

Point-to-Point Protocol Over Ethernet DAEMON (org/ieee/ethernet)

PPT

Power Point (com/us/microsoft)

PPTX

PowerPoint Microsoft Open XML (com/us/microsoft)

PPVPN

Provider Provisioned VPN (org/ietf)

PQFP

Plastic Quad Flat Package (ict/comp/cpu)

PRI

Primary Rate Interface (org/itu/isdn)

PRISTINE

PRogrammability In RINA for European Supremacy of virTualIsed NEtworks (org/eu/fp7/projects)

PRML

Partial Response - Maximum Likelihood (ict/comp/hdd)

PRw

Policy ReWriter (com/se/ericsson/nm-lab/upt)

PS

Port Selector (ict/comp/hdd/sata)

PS

Process Status (ict/os/unix/commands)

PSAP

Presentation Service Access Point (org/itu/x200)

PSE

Port Switched Ethernet (org/ieee/ethernet)

PSK

Pre-Shared Key (ict/security)

PSM

Personal Security Manager (ict/security)

PSN

Packet Switched Network (org/ietf/ppvpn)

PSOC

Pouzin Society (org)

PSPDN

Packet Switched Public Data Network (org/itu/q1200)

PSS

Pre-Shared Secret (ict/security)

PSTN

Public Switched Telephone Network (org/itu/q1200)

PT

Payload Type (org/itu/atm)

PTC

Patches Thoughtfully Considered (jargon)

PTI

Payload Type Identifier (org/itu/atm)

PTK

Pairwise Transient Key (ict/security)

PTM

Packet Transfer Mode (org/itu/atm)

PTP

Point-To-Point (ict/net)

PTr

Policy Transformer (com/se/ericsson/nm-lab/upt)

PV

Physical Volume (ict/comp/hdd)

PVC

Permanent Virtual Circuit (org/itu/atm)

PVCC

Permanent Virtual Channel Connection (org/itu/atm)

PVN

Property Version Number (com/us/microsoft/ad)

PVPC

Permanent Virtual Path Connection (org/itu/atm)

PW

Pseudo Wire (org/ietf/ppvpn)

PWD

Print Working Directory (ict/os/unix/commands)

PWM

Pulse Width Modulation (ict/comp/dvd)

PWP

Phase Wobble Pre-pit (ict/comp/dvd)