P	provider
P-TMSI	Packet -Temporary Mobile Subscriber Identity
P2	Proxy 2
PA	PCP-Authentication
PA	Posture Attribute
PA	Presence Agent
PA	Progress Answer
PA	Provider Address
PA	Provider-Aggregatable
PAA	PANA Authentication Agent
PAA	policy approving authority
PAC	PPTP Access Concentrator
PAC	Protected Access Credential
PAC	Proxy Auto Configuration
PAD	Peer Authorization Database
PADG	PPPoE Active Discovery Grant
PADI	PPPoE Active Discovery Initiation
PADQ	PPPoE Active Discovery Quality
PADR	PPPoE Active Discovery Request
PAE	Port Access Entity
PAF	PME Aggregation Function
PAK	Password-Authenticated Key
PAKE	password-authenticated key exchange
PAM	Pluggable Authentication Modules
PAN	primary account number
PAP	Password Authentication Protocol
PAP	Printer Access Protocol
PAR	PANA-Auth-Request
PAR	previous access router
PARC	Palo Alto Research Center
PAS	Path Affinity Set
PASS	personal authentication system string
PASS	personnel authentication system string
PAT	Port Address Translation
PAT	Program Association Table
PAWS	Protection Against Wrapped Sequences
PAWS	Public Access WiFi Service
PB	Posture Broker
PBA	Proxy Binding Acknowledgement
PBB	Provider Backbone Bridge
PBB-TE	Provider Backbone Bridging -Traffic Engineering
PBBN	Provider Backbone Bridged Network
PBE	Password-Based Encryption
PBK	Purpose-Built Keys
PBKDF2	Password-Based Key Derivation Function 2
PBM	Policy-based Management
PBN	Peripheral Border Node
PBR	Policy-based routing
PBS	Peak Burst Size
PBU	Proxy Binding Update
PC	Parse Code
PC	Political Correctness
PC	Posture Collector
PC	Preemption-Capability
PC	Program Counter
PC	Protocol Controller
PC	permission certificates
PC	private certificate
PCA	Policy Certification Authority
PCB	Payload Confidentiality Block
PCB	protocol control block
PCC	Path Computation Client
PCC	Profile Content Component
PCE	Path Computation Element
PCE	Physical Control Element
PCECP	Path Computation Element Communication Protocol
PCEP	Path Computation Element Protocol
PCH	Path Control Header
PCI	PANA-Client-Initiation
PCI	protocol control information
PCIM	Policy Core Information Model
PCM	Pulse Code Modulation
PCMP	Pip Control Message Protocol
PCN	Pre-Congestion Notification
PCN	Publishing Content Network
PCP	Port Control Protocol
PCP	Priority Code Point
PCPIM	Path Computation Policy Information Model
PCR	Peak Cell Rate
PCR	Program Clock Reference
PCS	Path Control Size
PCS	Personal Communications Services
PCV	Path Coding Violation
PD	Packet Delay
PD	Path Degraded
PD	Prefix Delegation
PD	Propagation Delay
PD	Protection Domain
PDA	personal digital assistant
PDB	Per-Domain Behavior
PDCP	Packet Data Convergence Protocol
PDF	Policy Decision Function
PDF	Portable Document Format
PDF	Probability Density Function
PDF	pad-derivation function
PDH	Plesiochronous Data Hierarchy
PDH	Plesiochronous Digital Hierarchy
PDL	Page Description Language
PDN	Packet Data Network
PDN	Public Data Network
PDP	Packet Data Protocol
PDP	policy decision point
PDR	Peak Data Rate
PDR	Policy Disable Rule
PDS	PKI Disclosure Statement
PDS	Parameter Data Structure
PDS	Profile Delivery Server
PDS	protective distribution system
PDSN	Packet Data Serving Node
PDU	Protocol Data Unit
PDV	packet delay variation
PE	Password Element
PE	Pool element
PE	Portable Executable
PE	Provider Edge
PE	provider-edge
PE-CE	Provider Edge -Customer Edge
PEAP	Protected Extensible Authentication Protocol
PEF	Packet Elimination Function
PEM	Privacy Enhanced Mail
PEM	Privacy-Enhanced Mail
PEN	Private Enterprise Number
PEP	Policy Enforcement Point
PEP	performance enhancing proxy
PER	Packed Encoding Rules
PER	Policy Enable Rule
PER	packet error ratio
PERC	Privacy-Enhanced RTP Conferencing
PESC	Postsecondary Electronic Standards Council
PETDM	Protocol Element Type Declaration Mnemonic
PF	Path Failure
PF	Potentially Failed
PFC	Protocol Field Compression
PFC	Protocol-Field-Compression
PFE	Physical Forwarding Element
PFF	Protocol Field Flag
PFM	PIM Flooding Mechanism
PFR	Portable Font Resource
PFS	Perfect Forward Secrecy
PFS	Perfect-forward secrecy
PG	Path Group
PG	Portal Group
PGM	Pragmatic General Multicast
PGM	Pragmatic Generic Multicast
PGP	Pretty Good Privacy
PGT	Portal Group Tag
PH	pool handle
PHB	Per Hop Behaviour
PHB	Per-Hop-Behavior
PHB	per-hop behavior
PHES	Payload Header Extension Structure
PHP	Penultimate Hop-Popping
PHP	Pip Header Protocol
PHP	penultimate hop popping
PHS	Payload Header Suppression
PHT	Proactive Handover Tunnel
PI	Piggyback Input
PI	Policy Identifier
PI	Processing Instruction
PI	Proportional Integral
PI	Provider Independent
PI	Provider-Independent
PI	protocol interpreter
PIA	Policy-Install-Answer
PIB	Packet Integrity Byte
PIB	Payload Integrity Block
PIB	Policy Information Base
PIC	Practical Internet Coordinates
PIC	point-in-call
PICS	Protocol Implementation Conformance Statement
PIDF	Presence Information Data Format
PIDF	Presence Information Document Format
PIDF-LO	Presence Information Data Format -Location Object
PII	Personally Identifiable Information
PII	personally identifying information
PIM	Personal Information Management
PIM	Practically Irrelevant Multicast
PIM	Protocol Independent Multicast
PIM-DM	Protocol Independent Multicast -Dense Mode
PIM-SM	Protocol Independent Multicast -Sparse Mode
PIN	Personal Identification Number
PIN	Policy Ignorant Node
PIN	pager identity number
PIO	Prefix Information Option
PIR	Policy-Install-Request
PIS	Proximity Identifier Selection
PISN	Private Integrated Services Network
PITR	Proxy Ingress Tunnel Router
PIU	Path Information Unit
PJL	PRINTER JOB LANGUAGE
PK	Public Key
PKC	Public Key Cryptography
PKC	public-key-cryptosystem
PKCS	Public Key Cryptography Standard
PKCS	Public-Key Cryptography Standards
PKE	Public-Key encryption
PKI	Public Key Infrastructure
PKI	public-key infrastructure
PKIX	Public Key Infrastructure X.509
PKIX	Public-Key Infrastructure X.509
PKO	Public Key Organization
PKOI	Public Key Organization Index
PKP	Public Key Pinning
PKS	Path Key Subobject
PL	Packetization Layer
PL	Priority-Level
PLBM	Packet-Loss-Based Method
PLC	Packet-loss concealment
PLC	Policy Lifetime Change
PLC	Power Line Communication
PLC	packet loss concealment
PLD	Physical-Layer-Down
PLD	programmable logic device
PLE	Packet Level Entity
PLI	Picture Loss Indication
PLI	Private Line Interface
PLL	Phase Locked Loops
PLL	phase-lock loop
PLMN	Public Land Mobile Network
PLR	packet loss ratio
PLS	Pronunciation Lexicon Specification
PLT	Prune Limit Timer
PLU	Priority Least Used
PM	Pervasive Monitoring
PM	partition manager
PM	performance monitoring
PMA	Proxy Mobility Agent
PMA	policy management authority
PMAG	Previous Mobile Access Gateway
PMBR	PIM Multicast Border Router
PMC	President's Management Council
PMD	Physical Media Dependent
PMD	Physical Medium Dependent
PMD	Polarization Mode Dispersion
PME	Packet Matching Engine
PME	Pattern Matching Engine
PME	Physical Medium Entity
PMK	Pairwise Master Key
PML	path merge LSR
PMP	Port Mapping Protocol
PMSI	P-Multicast Service Interface
PMSI	Provider Multicast Service Interface
PMT	Program Map Table
PMTU	PATH MAXIMUM TRANSMISSION UNIT
PMTUD	Path Maximum Transmission Unit Discovery
PN	Proxy Node
PN	provider network
PNA	PANA-Notification-Answer
PNC	Profile Notification Component
PNC	Provisioning Network Controller
PNF	Physical Network Function
PNG	Portable Network Graphics
PNL	Pacific Northwest Laboratory
PNNI	Private Network-Network Interface
PNNI	Private Network-Node Interface
PNR	PANA-Notification-Request
PNS	PPTP Network Server
PNS	Proximity Neighbor Selection
PO	Passive-Open
PO	Piggyback Output
POC	Partial Order Connection
POC	Point of Contact
POF	Packet Ordering Function
POI	Purge Originator Identification
PON	Passive Optical Networks
POOF	Passive Observation Of Failures
POP	Point Of Presence
POP	Post Office Protocol
POP	Proof of Possession
POP	Proof-of-possession
POR	Point of Repair
PORT	PIM Over Reliable Transport
POS	Packet over SONET
POSH	PKIX over Secure HTTP
POST	Power-On Self Test
POTS	Plain Old Telephone Service
PP	Partial PDUs
PP	Payload Pointer
PP	Prune-Pending
PP	presence protocol
PPA	Push-Profile-Answer
PPD	Packet Processing Delay
PPG	Protected Path Group
PPM	Parts Per Million
PPN	Permanent Port Name
PPPL	Princeton Plasma Physics Laboratory
PPR	Push-Profile-Request
PPS	Pulse-per-second
PPT	Prune Pending Timer
PPT	Prune-Pending Timer
PPVPN	Provider Provisioned Virtual Private Network
PQ	Progress Query
PQO	Provisioning Quotation Order
PR	Progress Report
PR	Puerto Rico
PRA	Purported Responsible Address
PRC	Primary Reference Clock
PRD	Permanent Reference Document
PRD	Policy Rule Deleted
PRE	PANA Relay Element
PRF	Packet Replication Function
PRF	Pseudo Random Function
PRF	pseudo-random function
PRFD	PATH Received, Forward Data
PRI	Primary Rate Interface
PRL	Parameter Request List
PRL	Policy Rule List
PRL	Potential Router List
PRM	Port Range Mask
PRM	Privileged Resource Manager
PRNG	pseudo-random number generator
PROM	programmable read-only memory
PRR	Port-Range Router
PRR	policy reserve rules
PRS	Policy Rule Status
PRS	Proximity Route Selection
PRT	Policy Refresh TIME_VALUES
PRV	Port Range Value
PS	Packet-switching
PS	Portal Service
PS	Proposed Standard
PS	packet switched
PS	problem statement
PSA	Paired SNPA Address
PSAP	Public Safety Access Point
PSAP	Public Safety Answering Point
PSBT	Phase Shaped Binary Transmission
PSC	PHB Scheduling Class
PSC	Packet Switch Capable
PSC	Packet Switching Capable
PSC	Pittsburgh Supercomputing Center
PSC	picture start code
PSC	protection state coordination
PSD	Power Spectral Density
PSD	Power Spectrum Density
PSD	Public Suffix Domain
PSDM	Packet-Specific Dual Marking
PSE	Personal Security Environment
PSFD	PATH Sent, Forward Data
PSI	Precision Systems, Inc.
PSI	Program Specific Information
PSI	Protocol-Specific Indication
PSIRP	Publish-Subscribe Internet Routing Paradigm
PSK	pre-shared key
PSKC	Portable Symmetric Key Container
PSKI	Pre-Shared Key Import
PSL	Path Switch LSR
PSN	Packet Sequence Number
PSN	Packet Switch Node
PSN	Packet Switched Network
PSN	Packet Switching Network
PSN	Packet-Switched Networks
PSN	Public Service Network
PSN	packet-switching networks
PSNLR	Packet Sequence Number Last Received
PSNTP	Packet Sequence Number This Packet
PSO	Protocol Support Organization
PSO	Public Suffix Operator
PSP	Penultimate Segment Pop
PSRD	PATH Sent, Reverse Data
PST	Path Segment Tunnel
PSTN	Public Switched Telephone Network
PSTN	public switched telephony network
PT	Packet types
PT	Payload type
PT	Policy Token
PT	Posture Transport
PT	Protection Type
PT	Protocol Translation
PT	Prune Timer
PTA	PANA-Termination-Answer
PTA	PMSI Tunnel attribute
PTA	PPP Terminated Aggregation
PTB	Packet Too Big
PTI	Payload Type Indicator
PTK	Pairwise Transient Key
PTM	point-to-multipoint
PTN	Packet Transport Network
PTP	Performance Transparency Protocol
PTP	Precision Time Protocol
PTP	Protected Traffic Portion
PTP	point-to-point
PTR	PANA-Termination-Request
PTR	Peak Target Rate
PTS	Platform Trust Service
PTS	Presentation Time Stamp
PU	Physical Units
PU	Pool User
PUA	Presence User Agent
PUSI	Payload Unit Start Indicator
PV	Preemption-Vulnerability
PVC	Permanent Virtual Connections
PVCC	Permanent Virtual Channel Connection
PVPC	Permanent Virtual Path Connection:
PW	Pseudo Wire
PW	pseudo-wire
PWD	PRINT WORKING DIRECTORY
PWG	Printer Working Group