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What does QAF stand for?

QAF stands for Queued Arbitrated Function

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Other Resources: Acronym Finder has 8 verified definitions for QAF

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) OMC Operation and Maintenance Center, ??? OMC Operation Maintenance Center, ???? ????, ?? ?? ??, ?? ?? ?? OMCR Operation and Maintenance Center for Radio OMCS Operation and Maintenance Center for Switching OMD Operation & Maintenance Device* OMDST Operation & Maintenance Device Supervision & Test Block* OMG Object Management Group, ???? ????? ?? OMHP Operation & Maintenance Processor Hardware block, ?? ??? ?? OMI Open Microprocessor Initiative OMIBAC Ordinal Memory Inspecting Binary Automatic Computer OMID Operation and Maintenance Interface Device, ?? ?? ?? ???? OMID Operation Management Interface Device, ???? ????? ?? OMIS Common Management Information Services OMMI OMC Man-Machine Interface Block, ?? ??? ??? OMNIPoint Open Management Interoperability Point, ?? ??? OMP Object Modelling Technique OMP Operation & Maintenance Processor, ???? ???? OMP Operation and Maintenance Processor, ???? ????* OMP Operation Maintenance Processor, ???? ???? OMPR Optical Mark Page Reader OMR Optical Mark Reader, ?? ?? ??? OMS Open Measurement Solution, ??? ?? ??? OMS Operation and Maintenance Subsystem, ???? ????? OMS Orbotal Maneuvering System OMT Object Modeling Technique, ?? ????, ???? ????, OMT? OMT Orthomode Transition OMT Overhead Message Train ONA Open Network Architecture, ??? ???? ??, ?? ???? ???? ONC Off-Net Calling ONC Open Network Computing ONCB OMC Network Connection Block, ???? ? ??? ONN Open Network Node, ?? ???? ?? ONP Open Network Provision, ??? ???? ?? ONR Office of Naval Research ONR Overload Noise Ratio, ??? ??? ONT Optical Network Termination ONU Optical Network Unit, ? ??? ??, ? ??? ? ?? ?? OO Object-Oriented, ?? ?? OOA Object-Oriented Analysis, ?? ?? ?? OODB Object-Oriented DataBase, ?? ?? ?????? OODBMS Object-Oriented DataBase Management System, ?? ?? ?????? ?? ??? OODDL Object-Oriented Data Definition Language, ?? ?? ?????? ?? ?? OOF Out-of-Frame* OOK On-Off Keying OOL Operator Oriented Language OOMW Object-Oriented Multimedia Workbench OOP Object-oriented programming, ?? ??? ????? OOPS Off-Line Operating Simulator OOUI Object-Oriented User Interface, ?? ?? ??? ????? OP-AMP Operational Amplifier, ?? ??? OPAC On-line Public Access Catalog OPC OPerator Call, ???? ??? ???? ?? OPC Operator Position Circuit/Controller OPC Organic Photoconducting Cartridge OPC Origination Point Code(Signaling System No. 7) OPC Own Point Code OPDU Operation Protocol Data Unit, ?? ???? ??? ?? OPP Octal Print Punch OPP Opposite OPP Optical Port Processor, ?? ?? ??? OPR Optical Page Reader OPS On-Line Process Synthesizer OPSIC Operators Identification Code OPT Open protocol Technology OPT Output Port Controller OPT OutPut Transformer, ?? ??? OPTUL Optical Pulse Transmitter Using Laser OQL OODB Query Language OQPSK Offset Quadrature Phase Shift Keying, ??? ?? ?? ?? ?? OQPSK Staggered Quadrature Phase Shift Keying OR Operations Research, ????? ??? ORB Object Request Broker ORBIT-I Orbital Spacing Optimizer Version I, ?? ?? ??? ???? ORD Optical Rotary Dispersion ORDVAC Ordnance Variable Automatic Computer ORI Operational Readiness Inspection ORT Operational Readiness Test ORTLR Originating Translator, ??? ?? ??? ORTS Oracle Real Time Server, ??? ??? ?? OS Operating System, ?? ??, ????? ???, ?? ??? OS VS2 Operating Syste Virtual System 2 OS-links OverSampled Links OS/2 Operating System/2, ???? OS/2 EE Operating System/2 Extended Edition OS/VS Operating System/Virtual Storage, ?? ?? ?? ?? OSAM Overflow Sequential Access Method, ?? ?? ?? ??? ?? OSC Oscillator, ?? ??? OSD Office of the Secretary of Defense OSD On Screen Display OSDP One-State DP (??) OSE Open System Environment, ??? ??? ??, ?? ??? ?? OSF Open Software Foundation, ?? ????? ?? OSF Open System Foundation OSF Order Statistics Filter, ?? ?? ?? OSI Open System Interconnection OSI Open System Interconnection, ??? ??? ? ?? ??, ?? ??? ?? ?? OSI Open Systems Interconnect, ??? ???, ???? OSI Open Systems Interconnection, ??? ???, ???? OSI RM Open System Interconnection Reference Model OSI TP Open Systems Interconnection Transaction Processing, OSI ???? ?? OSIE Open Systems Interconnection Environment, ?? ??? ?? ?? OSIP Open Systems Interconnection Profile, ?? ??? ?? ???? OSM Off-Screen Model OSPF Open Shortest Path First, ?? ?? ?? OSPG Open Client/Server System Partners Group, ?? ?????·?? ?? ??? OSPS Operator Service Position System, ???? ?? ????? ????? OSR Optical Scanning Recognition OSR Optical Solar Reflector OSS Operating System Subsystem, ???? ????? OSS Optional Service Subsystem OSW Optical Switch OSZT One Side Z Transform, ?? Z ?? OTA Operational Trans-Conductance Amplifier OTAC Ordnance Tank Automotive Command OTAR Over The Air Registration, ??? ?? ? ?? ?? ?? OTAR Over The Air Registration, ?? ?? ?? OTDR Optical Time Domain Reflectometer, ???? ??? ???? OTDR Optical Time-Domain Reflectometer (method), ???? ??? ???? OTM Online tellers Machine, ??? ??? ?? OTPROM One Time Programmable Read Only Memory, 1?? ???? ?? ?? ?? ??? OTPROM One Time Programmable ROM, 1?? ???? ?? ?? ?? ??? OTR OrthoTelephonic Response, ?? ?? ?? OTS Object Transaction Service OTS Once at a Time Search, ? ?? ?? OUP Originating User Prompter OVEAD Open View efd application daemon ovead open view efd application daemon OVPO Outside Vapor-phase Oxidation, ?????? OVR OverVoltage Relay, ??? ??? OVTE Optical Video Transmission Equipment, ??? ?? ?? OWC Order Wire Channel, ??? ??* OWS Office Workstation, ??? ??? ??? P Padding P Parity, ??? P Pico, ?? P Pointer, ??? P Poll bit, ? ?? P Positive Flag P PPPPPPPPPPPP ???????? P Predictive (picture), ???? ????? ????? P Predictive - picture, ???? ????? ????? P Priority, ???? P Protection, ?? P Sample Precision, ???? ??? ??? ??? P&P Plug & Play P-Code Protect Code, ?? ?? P-CON Presentation Connection, ?????? ?? P-COX Pencil COaXial, ?? ?? P-F Poll-Final bit, ?-?? ?? P-MAC Packet MAC P-N Positive-Negative P-N Project Number P-NNI Private Network-to-Network Interface P-pulse Position pulse P/D Protection Device, ?? ?? P/F Poll bit per Final bit P/S Parallel to Serial, ??-?? ?? P/S POTS Splitter P/Z/N Positive/Zero/Negative P1 Protocol 1, ???? 1 (MTAE) P2 Protocol 2, ???? 2 (UAE) P3 Primavera Project Planner P3 Protocol 3, ???? 3 (MTAE-SDE) PA Paging Area PA Phase Alignment, ???? PA Physical Address, ??? ?? PA Point-of-Attachment PA Power Amplifier, ?? ??? PA Pre Amplifier PA Pre Assignment, ?? ?? (??) PA Pre-Arbitrated PA PreAmble, ???? PAB Performance Analysis Block (IMT-2000) PABX Private Automatic Branch Exchange, ??? ?? ??, ??? ?? ?? ??, ?? ?? ?? ?? PAC Paging Area Controller PAC Pass-along Control (IMT-2000) PAC Pedagogic Automatic Computer PACC Product Administration and Contract Control system (UNIVAC) PACE Packaged Cram Executive (NCR) PACE Performance And Cost Evaluation PACE Precision Analogue Computing Equipment PACE Processing And Control Element, ?? ? ?? ?? PACE Programming Analysis Consulting Education PACER Program Assisted Console Evaluation and Review PACER Programmed Automatic Communications Equipment PACS Personal Access Communications System PACS Picture Archiving and Communication System, ?? ?? ?? ?? ??? PACS-UB Personal Access Communications System-Unlicensed B PACT Pay Actual Computer Time PACT Production Analysis Control Technique PACT Programmed Automatic Circuit Tester PAD Packet Assembler and Dissembler PAD Packet Assembler-Dissembler, ?? ????·??????, ?? ??·??, ?? PAD Packet Assembler/Dissembler PAD Packet Assembly and Disassembly PAD Packet Assembly Disassembly PAD Packet Assembly/Disassembly PAD Padding PAD Problem Analysis Diagram PAI Programmer Sppratisal Instrument PAL Phase Alternate Line PAL Phase Alternation by Line PAL Phase Alternation Line PALI Profile And Level Indication, ????? ??? ?? (MPEG) PALIS Property And Liability Information System PAM Personnel Accounting Management PAM Phase Amplitude Modulation, ?? ?? ?? PAM Pulse Amplitude Modulation, ?? ?? ??* PAMA Preassigned Multiple Access PAMR Public Access Mobile Radio PAMS Proceedings of the American mathematical Society PAP PCS Application Part PAP Public Access Profile PAR Parameter PAR Pel Aspect Ratio, ????? ????(??) ? (MPEG) PAR Precision Approach Radar, ?? ?? ??? PAR Program Appraisal and Review PAR Project Audit Report PARC Palo Alto Research Center PARCOR Partial Auto-Correlation, ???, ??? ?? ?? PARCOR Partial Correlation, ???, ??? ?? ?? PARD Precision Annotated Retrieval Display PAREX Programmed Accounts Receivable Extra Service PARP Proxy Address Resolution Protocol PARS Passenger Airlines Reservation System PART Parts Allocation Requirements Technique PARTNER Proof of Analog Results Through Numerically Equivalent Routine (Honeywell) PAS Program Address Storage PASC Pan American Standards Committee PASC Precision Adaptive Subband Coding, ?? ?? ???? ??? PASCAL Philips Automatic Sequence Calculator PASM PArtitionable Single Instruction stream Multiple Data stream PASS Program Aid Software Systems PASSIM President's Advisory Staff on Scientific Information Management PASTA Packet Arrivals See Time Average PAT Patent PAT Personalized Array Translator PAT Process And Tool oriented program PAT Programmer Aptitude Tester PATSY Program Automatic Testing System (ICT) PAU Performance Analysis Unit (IMT-2000) PAX Pilot Channel + Access Channel PAX Private Automatic Exchange PAX Processor Array Experiment PB Page Buffer PB Peripheral Buffer PB Personal Base station* PB Phonetically Balanced (audio term) PB Piggy Back PB Plug Board PB Publications Bulletin PB Push Button PBA Print Board Assembly PBDG Push Button Data Generator PBI Process Branch Indicator PBP PriorityBreak Point, ??????? ??? ??? ????? ?? ? ???? ?? ??? ???? ??? ?? (MPEG) PBP Push Button Panel PBS Paging Base Station PBS Personal Base Station PBS Pocket Bell Service, (??) PBS Public Broadcasting System PBUS Packet BUS, ?? ?? PBX Private Branch Exchange, ?????, ?? ?? ??, ?? ??, ?? ?? ?? ?? PBX/PABX Private Branch Exchange or Private Automated Branch Exchange PC Peak Counter PC Personal Computer, ??? ???, ??? ??? PC Presentation Connection, ?????? ?? PC Priority Control, ???? ?? PC Processor Cabinet PC Program Counter, ???? ???, ???? ??? PC Propagation Constant, ?? ?? PC Pseudo Contact, ???? ???? (?????) PC Pulsating current, ?? PC DOS Personal Computer Disk Operating System PCA Polar Cap Absorption phenomenon, ?? ?? ?? PCA Principle Component Analysis, ??? ?? (??) PCB Page Control Block, ??? ?? ?? PCB Parity Check Bit PCB Power Control Bit, ?? ?? ?? PCB Print Circuit Board, ?? ?? ?? PCB Printed Circuit Board, ?? ?? ?? PCB Program Communication Block, ???? ??? PCC Parity Check Code, ??? ?? ?? PCC Port Control Carrier PCC Program-Controlled Computer PCC Programmable Cross-Connect PCCA Processor Communication Control Board Assembly, ??????????? PCCA Processor Communication Controller board Assembly PCCB Paging Central Control Block* PCCB PCM Carrier Clock Board, PCM ?? ?? ??? PCCB-B PCM Carrier Clock Board-B, PCM ???? ?? ??? PCCH Physical Control Channel PCDP Punched Card Data Processing PCE Picture Coding Extension, ?? ??? ????? (MPEG) PCES Pages Central Earth Station PCF Point CF PCH Paging Channel PCI Paging Control Interface, ??? ?? ????? PCI Parallel Communication Interface, ?? ?? ????? PCI Pattern Correspondence Index(Intelligibility Measure) PCI Peripheral Command Indicator PCI Peripheral Component Interconnect bus, ?? ?? ?? ?? ?? PCI Peripheral Component Interconnect, ???? ?? ????(??) PCI Peripheral Component Interface PCI Port Control Interface PCI Process Check Interruption PCI Process Control Interface, ?? ?? ????? PCI Protocol Control Information, ???? ?? ??* PCIA Primary CEPT1 Interface, 1? CEPT1 ?? ??? PCIB Paging Central Interface Block* PCL Printed-Circuit Lamp PCL Printer Control Language, ??? ?? ?? PCLK Processor CLocK, ???? ?? PCLSP PC Lan Support Program PCM Package Command Manager PCM Plug Compatible Machine, ?? ??? PCM Plug Compatible Module PCM Pulse Code Modulation, ?? ?? ?? PCM Punched Card Machine, ?? ???, ?? ?? ?? ?? PCMCIA Personal Computer Memory Card International Association, ?? ??? ??? ??? ?? ?? PCME Packet Circuit Multiplex Equipment, ?? ?? ??? ?? PCMI Photo Chronic Micro Image (NCR) PCMS Punched Card Machine System PCN Personal Communication Network, ?? ??? PCN Personal Communications Network, ?? ??? PCO Procuring Contrast Offer PCON PCH Continuation PCOS Primary Communications Oriented System PCP Parallel Cascade Processor (Foxboro) PCP Primary Control Program PCP Process Control Processor PCP Processor Control Program PCP Program Change Proposal PCP Punched Card Punch PCPA Polar Cap Phase Anomaly, ?? ?? ?? PCQ Production Control Quantometer PCR Parent-Child Relationship PCR Peak Cell Rate, ?? ? ?? PCR Pen Character Recognition PCR Preventive Cyclic Retransmission, ??? ??? ??? PCR Program Clock Reference, ???? ?? ?? (MPEG) PCR Program Control Register PCR Punched Card Reader PCS Paging Central Station*, ??? PCS Personal Communication Service, ????, ??? ?? ???* PCS Personal Communication System, ??????, ?? ?? ???* PCS Personal Communications Services PCS Personal Conferencing Specification PCS Power Control Channel + Signaling Channel PCS Print Contrast Signal, ?? ??? PCS Punched Card System, ?? ?? ??? PCSW Paging Channel Software (IMT-2000) PCT Picture Coding Type, ?? ?? (MPEG) PCT Portable Camera-Transmitter PCWG Personal Conferencing Work Group, PC ?? ?? ?? ??? ?? PCX PCS Exchange, ?? ?? ?? ???* PD Peripheral Device, ?? ?? PD Phase Distortion, ???? PD Phase Shift, ?? ?? PD Photo Diode, ?? ???? PD Position Dial, ??? ??? PD Power Distribution, ?? ?? PD Processing Delay, ?? ?? PD Propagation Delay, ?? ?? PD Protection Device, ?? ?? PD Protective Device, ?? ?? ??, ?? ?? PD Protocol Discriminator (IMT-2000) PDA Patient Data Automation PDA Personal Data Assistant PDA Personal Digital Assistant, ??? ?????* PDA Personal Digital Assistants, ?? ?? ?? ???* PDA Probability Distribution Analyzer PDB Physical DataBase, ??? ?????? PDC Personal Digital Cellular* (??) PDC Power Distribution Cabinet PDCH Physical Data Channel PDCN Phone-Dependent Cepstral Normalization (??) PDE Picture Display Extension, ?? ????? ????? (MPEG) PDE Power Distribution Enclousre, ?? ??? ??? PDES Product Data Exchange using STEP PDF Package Definition File PDF Portable Document Format PDF Power Distribution Frame PDF Pre-emphasis and De-emphasis Filtering PDF Probability Density Function PDF Probability Distribution Function PDH Pleisynchronous Digital Hierarchy, ???? ??? ?? PDI Picture Description Instruction, ?? ??? ?? PDI Port Data Interface PDL Page-Description Language, ??? ?? ?? PDL Print Definition Language PDL Printed Device Logic PDL Procedure Definition Language PDM Phoneme Duration Model, ?? ?? ?? (??) PDM Product Data Management, ?? ?? ??, ?? ?? ?? PDM Pulse Density Modulation (IMT-2000) PDMA Polarization Division Multiple Access, ?? ?? ???? PDN Packet Data Network (IMT-2000) PDN Public Data Network, ?? ???? PDP Plasma Display Panel PDP Programmed Data Processor PDPS Part Data Processing System (Bell telephone) PDQ Programmed Data Quantizer PDR Precision Depth Recorder PDR Preliminary Data Report PDR Preliminary Design Review PDR Processed Data Recorder PDR Program Discrepancy Report PDR Program Document Requirement PDS Passive Double Star, ??? ?? ?? PDS Port Data Store PDS Processor Direct Slot, ???? ???? ?? PDS Program Data Source PDS Programmable Disc Subsystem (???) PDS Public Domain Software, ???????, ??? ??? ?????, ??????? PDT Page Descriptor Type PDTE Packet Data Terminal Equipment PDU Protocol Data Unit, ???? ??? ?? PDV Peak Detector Verifier PE Phase Encoded PE Phase Encoding, ?? ?? ??, ?? ??? ??, PE ?? PE Physical Entity (IMT-2000) PE Presentation Entity PE Processing Element, ?? ?? PE Professional Engineer PE Project Engineer PE Purchased Equipment PEC Phase Error Control, ?? ?? ?? PEC Photoelectric Cell PED Personnel Equipment Data PED Picture Extension Data PEE Phase Error Estimator, ?? ?? ??? PEER Project Engineer Evaluation Report PEF Pre-Emphasis Filter, ?? ?? ?? PEI Personal Endpoint Identifier PEI Picture Extra Insertion Information PEL Picture Element, pixel, ??, ?? Pel Picture Element, pixel, ??, ?? PEM Photoelectromagnetic PEM Privacy Enhanced Mail (PGP) PEP Program Evaluation Procedure PEPR Precision Encoding and Pattern Recognition PER Program Event Recording PERGO Project Evaluation and Review with Graphic Output PERL Practical Extraction and Reporting Language PERT Performance Evaluation and Review Technique, ???, ?? PERT Program Evaluation and Review Technique, ?? PERT/CPM Program Evaluation and Review Technique / Critical Path Method PES Packetized Elementary Stream, ??? ?? ???* PES Photoelectric Scanner PES Photoelectric Scanning PES Program Elementary Stream, ???? ?? ??? PESG Periodic Excitation Signal Generation, ??? ?? ?? ?? (??) PET Peripheral Equipment Tester PET Personal Electronic Transactor PET Personal Electronic Transactor computer PET Physical Equipment Table PET Position-Event-Time PEX PHIGS/PHIGS + Extention for X, ?? PF PicoFarad, ???? PF Poll/Final PF Progressive Frame, ? ??? ??????? ?? (MPEG) PF-KEY Program Function Key, ???? ?? ? PFB Polyphase Filter Bank, ????? ?? ??, ?? ?? ?? PFC Parallel Fortran Converter PFD Power Flux Density PFL Prefader listening PFM Paging Frame Modifier PFM Pulse Frequency Modulation PFR Programmed Film Reader system PFR Pulse Frequency PFR Tape Perforator PFT Paper, Flat Tape PG Pattern Generation PG Programmer Group PG Pulse Generator PGA Pin Grid Array, ? ??? ??, ? ??? ??? PGC Program Group Control, ???? ?? ?? PGCH PaGing Channel PGEC Professional Group on Electronic Computers PGEN Pattern Generator, ??? ???? PGP Pretty Good Privacy PGR Precision Graphic Recorder PGT PaGe Table PGT Page Table PH Packet Handler PH Page Heading PH Presentation Header, ?????? ?? PH-C Physical Connect, ?? ?? ?? PH-SAP Physical Access Point, ?? ??? ??? ? PH-SDU Physical Service Data Unit, ?? ??? ??? ?? PHCNT Phase Counter, ??? ??? PHD Parallel Head per track Disk PHENO Precise Hybrid Elements for Nonlinear Operations PHIGS Programmer's Hierarchical Interative Graphics Standard, ?????? ??? ?? ?? ??? ?? PHLAG Phillips Petroleum Load And Go system PHM Phase Modulation System PHP Personal Handy Phone, ??? ??? PHS Personal Handphone System, ?? ?? ?? ??? PHS Personal Handyphone Service PHSDU Physical Service Data Unit, ?? ??? ??? ?? PHY Physical (Layer), ?? ?? PHY Physical layer protocol, ??? ???? PHY Physical Protocol PI Inner code Parity, ?? ?? ??? PI Physical Interface, ??? ????? PI Priority Input, ???? ?? PI Protocol Identifier, ???? ??? PI Provider Identity PIA Peripheral Interface Adapter PIBA PSTN Interface Board Assembly (IMT-2000) PIC Parallel Interference Cancellation (IMT-2000) PIC Priority Interrupt Controller, ?? ?? ???? ??? PICA Power Industry Computer Application Conference PICA Printing Industry Computer Associates PICH Pilot Channel PiCH Pilot Channel PICS Productivity Improvement and Control System, ??? ?? ?? ??? PICU Priority Interrupt Control Unit PID Packet Identifier (MPEG) PID Personal Identification System, ?? ?? ??? PID Portable Identification Code PID Protocol Identifier PIE Parallel Instruction Execution PIE Parallel Interface Element PIE Plug-In Electronics PIE Public Information Exchange PIFS PCF Interface Spacing PILOT Printing Industry Language for Operation of Typesetting PIM Personal Information Management, ?? ?? ?? PIM Personal Information Manager, ?? ?? ?? ???? PIM Protocol Independent Multicast, ???? ?? ????? PIM-D Parallel Inference Machine based on the Dataflow model PIN Pending Interrupt Not PIN Personal Identification Number PIN-PD PIN - Photo Diode PING Packet InterNet Groper, ?? ??? ??? PINO Positive Input-Negative Output PIO Parallel Input Output PIO Parallel Input/Output, ?? ?·??, ??? ?·?? PIO Programmable input-Output chip, ???? ?? ?·?? ? PIO Programmed Input Output PIOCS Physical Input-Output Control System PIOCS Physical Input/Output Control System PIOCS Physical IOCS, ??? ICOS PIOU Parallel Input/Output Unit PIP Peripheral Interchange Program PIP Photointerpretive Program PIP Problem Input Preparation PIP Program In Progressor PIP Project on Information Processing PIR Peak Information Rate PISW Process Interrupt Status Word PIU Plug-In Unit PIU Programmable Interface Unit PJ Positive Justification PK Pragmatic Knowledge, ?? ?? (??) PKC Public Key Crytosystem, ??? ?? ??? PKD Public-Key Distribution System, ??? ???? PL Path Loss, (??) ?? ?? PL Product Liability, ??? ?? PL Production Language PL Programming Language PL/1 Programming Language/One PL/I Programming Language /I, vldpfdnjs PL/M Programming Language for Microprocessor, ????????? ????? ?? PL/S Programming Language for Systems PLA Programmable Logic Array, ???? ?? ?? ??, ?????? ?? ??? PLACE Programming Language for Automatic Checkout Equipment PLATO Programmed Logic for Automatic Teaching Operation, ????????? PLATO Programmed Logic for Automatic Teaching Operations PLATO Programmed Logic for Automatic Teaching Operations, ???, ?? ?? ??? ????? ?? PLATO-UK PLAnt TOxins-United Kingdom PLCC Plastic Leaded Chip Carrier PLCF Physical Layer Convergence Function PLCL Phase-Locked Control Loop, ??? ? ?? ??, ???? ???? PLCP Physical Layer Convergence Protocol, ?? ?? ?? ???? PLCSW Pilot Channel Software (IMT-2000) PLD Processor Load Data* PLD Programmable Logic Device, ???? ?? ?? ?? PLIANT PL/I Application Nucleus Tools PLIANT Procedural Language Implementing Analog Techniques (IBM) PLL Phase Locked Loop, ??? ? ??, ?????? PLL Phase-Locked Loop, ??? ? ??, ?????? PLL-PSK Phase Locked Loop - Phase Shift Keying PLMN Public Land Mobile Network (IMT-2000) PLMTN Public Land Mobile Telecommunication Networks PLN Probabilistic Logic Node PLO Phase-Locked Oscillator PLOAM Physical Layer OAM PLP Packet Level Procedure PLS Physical Layer Signaling, ?? ?? ?? PLT Program Library Tape PLU Phase Lock Unit PLU Phone-like Unit, ?? ?? ?? (??) PLUS PERT Life cycle Unified System (IBM) PLUS Program Library Update System PLUS Program Loading, Updating and Selection (Honeywell) PM Dialogue Model, ?? ?? (??) PM Performance Monitor, ??? ?? ?? PM Permanent Magnet PM Permanent Memory, ?? ?? PM Phase Modulation, ?? ?? PM Physical Media PM Physical Medium sublayer, ?? ?? ??? PM Physical Medium, ?? ?? PM Planned Maintenance PM Post Mortem PM Preventive Maintenance, ?? ?? ?? PM Procedures Manual PM Processor Module PM Pulse Modulation, ?? ?? PMA Physical Medium Attachment PMB Programmable Multiplexer Bank PMBS Packer-Mode Bearer Service PMC Program Marginal Checking PMC Pseudo Machine Code PMD Physical Media Dependent PMD Physical Media Dependent sublayer PMD Physical Medium Dependent (Layer) PMD Physical Medium Dependent, ??? ?? ?? PMD Post Mortem Dumps PME Picture Mux Enable, ?? ????????? ??? ?????? ?? ?(?) ???? ??? (MPEG) PMF Picture Mux Factor, ?? ????????? ?????? ??? ?? ??? ?????? ?? (MPEG) PMI Physical Medium Attachment PMI Physical Medium Interface, ??? ?? ????? PMIB Physical Medium Interface Block, ??? ?? ????? ?? PMN Performance Management (IMT-2000) PMO Picture Mux Order, ?? ????????? ?? ??? ?? ??? ???? ?? ?? (MPEG) PMOS P-Channel Metal-Oxide Semiconductor, P? ?? ??? ??? PMP Precision Mounting Platform PMR Pacific Missile Range PMRM Power Measurement Report Message PMS Processor, Memories and Switches PMS Program Management System PMS Project Management System PMTU Path Maximum Transmission Unit PMU Path Metric Unit, ?? ??? ?? PMU Power Monitor Unit, ?? ??? PMV Predicted Motion Vector PMX Packet Multiplexer PN Personal Numbering PN Pseudo Noise, ?? ?? PN Pseudo-random Noise PN code Pseudo Noise code, ?? ?? ?? PNA Parallel Network Architecture PNC Paging Network Controller* PNC PN Controller PNC Programmed Numerical Control PNEC Proceedings of the National Electronics Conference PNG Pink Noise Generator, ????? ??? PNM Pulse Number Modulation, ??? ?? PNNI Private Network-Network Interface, ????? ????-???? ????? PNNI Private Network-Node Interface, ????? ????-?? ????? PNNI Private NNI, ?? NNI PNP Private Numbering Plan* PO Outer code Parity, ?? ?? ??? PO Parallel Output PO Priority Output PO Purchase Order POC Process Operator Console POCSAG Post Office Code Standardization Advisory Group POD Point-of-Origin Device PODA Priority Oriented Demand Assignment POGO Programmer Oriented Graphics Operation POH Path Overhead, ?? ????, ?? ???? POI Point Of Initiation POI Point Of Interface POL Problem-Oriented Language, ?? ?? ?? PON Passive Optical Network, ?? ? ??? POP Point Of Presence POP Post Office Protocol, ??? ??? ???? POP Power On/off Projection POP Programmed Operator POP Programmed Operators and Primitives POPS Pantograph Optical Projection System POR Pacific Ocean Region (Intelsat) POR Point Of Return POR Problem Oriented Routine PORT Photo-Optical Recorder Tracker POS Point of Sale, ??, ?? ?? ?? ?? POS Point of Sales POS Point Of Sales system, ??? ?? ?? ?? ??? POS Probility Of Survival, ??? POS-FET POS Electronic Fund Transfer, ?? POS POSIX Portable operating system for computer Environments, ??? POSIX Portable operating system for interactive executives, ??? POST Power On Self Test POST Power-On Self-Test POTC PERT Orientation and Training Center POTS Plain Old Telephone Service, ?? ????? POTS Public Office Telephone System PP Packet Processor PP Pages PP Peak-to-Peak PP Peripheral Processor, ?? ???? PP Pilot Punch PP Play Pause, ?? ?? ?? PP Point Positioning, ?? ?? PP Portable Part PP Precise Point, ??? PP Preprocessor PP Print-Punch PP2S Pulse Per 2 Second PPA Professional Programmers Association PPC Plain Paper Copier PPC Power PC PPC Predicted Propagation Correction, ?? ?? ?? PPCI Presentation Protocol Control Information, ?????? ???? ?? ?? PPCS Pilot Channel + Power Control Channel + Signaling Channel PPDU Presentation Protocol Data Unit, ?????? ???? ???? PPE Problem Program Efficiency PPF Plain Paper Facsimile PPFB Polyphase Filter Bank, ????? ?? ?? PPH Per Position Height, ?? ??? PPI PDH Physical Interface PPI Primary Path Satellite PPI Programmable Parallel Interface, ???? ?? ?? ????? PPL Passive Photonic Loop PPM Part Per Million, 1???? 1 PPM Pulse Position Modulation, ?? ?? ??, ?? ?? ?? PPOS Peripheral Processor Operating System PPP Point to Point Protocol, ? ?? ? ????, ???-??? ???? PPP Point-to-Point Protocol, ? ?? ? ????, ???-??? ???? PPS Parallel Processing System, ?? ?? ??? PPS Precise Positioning Service, ?? ?? ??? PPS Pulse per Second, ?? ?? PPSDN Public Packet Switched Data Network PPSDN Public Packet-Switched Data Network PPSN Public Packet Switched Network PPT Part Per Trillion, 1??? 1 PPT Punched Paper Tape PPU Peripheral Processing Unit, ?? ?? ???? PPV Pay Per View, ?? ?? ?? PPW Per Picture Width, ?? ??? Pq Quantization Table Precision, ??? ???? ??? PQFP Plastic Quad Flatpack Package PR Page Response, ??? ?? PR Partial Response, ?? ?? (?????) PR Pattern Recognition PR Periodic Report PR Picture Rate, ??? ???? (MPEG) PR PRepare PR Print PR Procurement Requirement PR Proximity Recording, ?? ?? ?? (?????) PR Pseudo Range, ?? ?? PR Public Relation, ?? ?? PR Purchase Request PR-1 Print Register 1 PR-A Pre Amplifier PRA Pel Recursive Algorithm PRA Primary Rate Access, ??? (??) ?? PRA Print Alphamerically PRAM Parallel Random Access Memory PRB Primary Reference Burst PRBS Pseudo-Random Binary Sequence PRBS Pseudorandom Binary Sequence PRC Partial Response Channel, ?? ?? ?? PRCA Proportional Rate Control Algorithm, ?? ?? ?? ?? PRCB Paging Remote Control Block* PRD Program Requiremwnts Document PREP Powerpc Reference Platform PREP Programmed Educational Package (UNIVAC) PREP Project Return Evaluation Program PREPARE Plan for Retraining of Employable Persons as Related to EDP PRES Progressive Reduction Standard, ?????? ????? ?? ???? ??? ???? PRI Primary Rate access Interface PRI Primary Rate Interface (IMT-2000) PRIB Paging Remote Interface Block* PRIB Primary Rate Interface Board, 1?? ?? ??? ?? ??? PRIME Programmed Instruction for Management Education PRISM Programmed Integrated System Maintenance PRK Phase Reversal Keying = BPSK PRM Paging Response Message, ??? ?? ??? PRM Premium Rate PRM Protocol Reference Model, ???? ?? ?? PRMA Packet Reservation Multiple Access PRMD Private Management Domain, ?? ?? ??, ?? ?? ?? PRML Partial Response Maximum Likelihood, ?? ?? ?? ??? (?????) PRNC Pseudo Random Noise Code, ?? ?? ?? PRO Precision RISC Organization, ?? PROFIT Programmed Reviewing, Ordering, and Forecasting Inventory Technique (Honeywell) PROLOG PROgramming LOGic PROM Programmable Read Only Memory, ??, ???? ?? ROM PROMOCOM Project Monitor and Control Method PROMPT Program Monitoring and Planning Techniques PRONTO Program for Numerical Tool Operation PROP Performance Review for Operating Programs PROXI Projection by Reflected Optics from Xerographic Images Proxy ARP Proxy Address Resolution Protocol, ?? ARP, ?? ?? ?? ???? PRP Pseudorandom Pulse PRR Pulse Repetition Rate PRR Pulse-Repetition Rate PRS Paging Remote Station*, ??? PRS Partial Response Detection PRS Pattern Recognition Society PRS Pattern Recognition System, ?? ?? ??? PRS Peak Rate Spacer PRS Pointer Register Slave PRS Position Register Sender PRS Position Reporting System, ?? ?? ??? PRS Prediction Residual Signal, ?? ?? ?? (??) PRS Primary Reference Source PRT Primary Reference Terminal PRT Printer PRU Pacing Rate Unit PRUG Packet Radio User's Group, ???, ?? ??? ??? ?? PRV Peak Reverse Voltage PRW Percent Rated Wattage PS Packet Switching, ???? PS Parity Switch PS Personal Station, ???* PS Pico Second PS Planning and Scheduling PS Point of Shipment PS Power Splitter PS Power Supply PS Presentation Service, ?????? ??? PS Pressure-Sensitive PS Previous Station PS Processor Sharing PS Program Stream, ???? ??? PS Programmable Switch PS Progressive Sequence, ??????? ?? (MPEG) PS Protection Switching PS Pulse Shaper PS Spontaneous Polarization PS/2 Personal System 2 PSA Pilot/Synchronous/Access Channel Element* PSA Primary & Secondary Accumulator, 1? ? 2? ??? PSAA Port Switching Adapter Assembly PSAP Presentation Service Access Point, ?????? ??? ??? ??? PSAP Presentation Service Access Point, ?????? ??? ???? PSAR Programmable Synchronous/Asynchronous Receiver PSAT Programmable Synchronous/Asynchronous Transmitter PSB Program Specification Block PSC Peripheral Systems Corporation PSC Picture Start Code, ?? ?? ?? (MPEG) PSC Public Service Commission, ???????(??? ? ?) PSC Pulse per SeCond, ?? ?? PSCAN Progressive Scan, ???? PSCS PagerSat System Central Station State PSD Port Sharing Device PSD Program Stream Directory PSDN Packet Switched Data Network, ?? ??? PSDN Packet Switching Data Network, ?? ??? PSDN Packet-Switched Data Network, ?? ??? PSDN Public Switched Data Network, ?? ??? ???, ?? ?? ???? PSDN Public Switching Data Network, ?? ??? ??? PSDU Presentation Service Data Unit, ?????? ??? ??? ?? PSF Pitch Synthesis Filter, ?? ?? ?? (??) PSF Protection Switching Failure PSG Phrase Structure Grammar, ? ?? ?? (??) PSG Programmable Sound Generator, ???? ?? ?? PSI Pressure Sensitive Identification PSI Proto Syntax Indexing PSI-CELP Pitch Synchronous Innovation CELP (??) PSID Personal Station Identification PSJ Pulse Stuffing Justification, ?? ?? PSK Phase Shift Keying, ?? ?? ??, ?? ?? ?? PSM Program Stream Map PSM Protocol State Machine PSN Packet Satellite Networks = TRMA PSN Packet Switch Node, ?? ??? ?? PSNR Peak Signal-to-Noise Ratio, ?? ?? ? ??? ? PSOLA Pitch Synchronous Overlap Add (??) PSOLA Pitch Synchronous Overlap and Add (??) PSOLA Pitch Synchronous Overlap-Add (??) PSP Phrase Structure Parser, ? ?? ?? (??) PSP Power System Planning (IBM) PSP Program Segment Prefix PSPARE Picture Layer Spare Information, ?? ? ???? PSPDN Packet Switched Public Data Network* PSPDN Packet-Switched Public Data Network PSR Previous Slot Release PSR Processor State Register PSRAM Pseudo SRAM, ?? SRAM PSS Physical Signaling Sublayer, ??? ?? ????? PSS Power Spectral Subtraction, ?? ???? ??? (??) PSS Pre-stored Speaker, ?? ??? ?? (??) PSS Proprietary Software Systems PSSE Picture Spatial Scalable Extension, ?? ?? ????? ????? (MPEG) PST Processor STatus, ???? ?? PSTC Paging Switch Telephone Network PSTN Present STN, ????? PSTN Public Switched Telephone Network, ?? ?? ???, ?? ?? ???* PSTN Public Switched Toll Network PSTN Public Switching Telephone Network, ?? ?? ???* PSTR Picture Structure (MPEG) PSU Port Sharing Unit, ??? ?? ?? PSU Port Switch Unit PSU Power Supply Unit, ?? ?? ?? PSW Program Status Word, ???? ????? ??, ???? ??? PSYCO Princeton Syntax Compiler PT Packet Mode Terminal, ?? ?? ??* PT Packet Model Terminal PT Page Table PT Paper Tape PT Paper Type PT Part Time PT Partially Tested PT Path Trace, ?? ?? PT Payload Type, ?? ?? ??* PT Pencil Tube PT Performance Test PT Please Token PT Please Tokens PT Point PTC Pacific Telecommunications Council PTC Paper tape Controller PTC Proctor Test Set, ??? ??? ?? PTC Programmed Transmission Control (IBM) PTE Path Termination Equipment PTE Peculiar Test Equipment PTI Packet Type Identifier PTI Payload Type Identifier, ?? ?? ??? PTL Payload Test Laboratory, ?? ?? ?? ?? ?? PTL Phase Tracking Loop, ?? ?? ?? PTM Pulse Time Modulation PTMP Point-to-MultiPoint PTN Personal Telecommunication Number PTN Personal Telecommunications Number PTP Paper Tape Punch, ?? ??? ?? ??, ?? ??? ??? PTP Point-to-Point Network, ?? ??? PTP Point-to-Point, ?? ??(?) PTR Paper Tape Reader, ?? ??? ??? PTR Pointer, ??? PTR Provider Trouble Report PTRP Paper Tape Reader-Switch PTS Presentation Time Stamp (MPEG) PTS Proceed-To-Send signal, ?? ?? ?? PTSE Picture Temporal Scalable Extension, ?? ?? ????? ????? (MPEG) PTT Ministere des Postes et Telecommunications et de la Telediffusion, ?? ?? ??? PTT Ministry of Posts, Telegraphs and Telephones, ??·??·?? ??? ???, ??? PTT Post Telephone and Telecommunications, ??? PTT Postal Telephone and Telegraph PTT Press To Talk PTT Press-To-Talk PTT Program Test Tape PTT Push To Talk PTYPE Picture Type Information, ??? ?? ?? PU Physical Unit, ?? ?? PU PickUp PU Power Unit PU Push to Talk PU 2. 1 Physical Unit 2. 1, ?? ?? 2. 1 PU 4 Physical Unit 4, ?? ?? 4 PU 5 Physical Unit 5, ?? ?? 5 PUC Public Utilities Commission PUDL Push Down List PUFFT Purdue University Fast FORTRAN Translator PUP Palo Alto Research Center Universal Protocol PUP PARC Universal Protocol, ?? ???? ???? PUP Peripheral Unit Processor PureALOHA Pure ALOHA PUSAS Proposed USA Standard PUT Programmable Unijunction Transistor PV Phase Vocoder, ?? ??? PVC Permanent Virtual Call PVC Permanent Virtual Channel (IMT-2000) PVC Permanent Virtual Circuit, ?? ?? ??, ?? ?? ??, ?? ?? ?? PVC Permanent Virtual Connection, ?? ?? ?? PVC Polyvinyl chloride PVD Primary Volume Description PVE Polyvinyl Chloride PVM Parallel Virtual Machine PVN Private Virtual Network PVR Precision Voltage Reference PVS Power Visualization System PVSC Point-to-point Virtual Signaling Channel, ??? ?? ?? ?? PW Plane Wave, ??? PW Pulse Width, ?? ? PWB PWB/UNIX system PWC Pulse-Width Code PWD Pulse-Width Discriminator PWE Perceptually Weighted Error, ?? ?? ?? (??) PWE Pulse-Width EncoderCode PWF Perceptually Weighted Filtering, ?? ?? ??? (??) PWHK NT Power Supply H/W block PWM Pulse Width Modulation, ?? ? ?? PWORD Penta-WORD PZM Pressure Zone Mic Q QQQQQQQQQQQQ ???????? Q Quiet Q&D Quick And Dirty QA Q Adapter QA Query Analyzer QA Question and Answer, ?? ?? QA Queue Arbitrated, ?? ?? QA Queued Arbitrary, ?? ?? QA Queued-Arbitrated QADS Quality Assurance Data System QAF Queued Arbitrated Function.
) OMC Operation and Maintenance Center, ??? OMC Operation Maintenance Center, ???? ????, ?? ?? ??, ?? ?? ?? OMCR Operation and Maintenance Center for Radio OMCS Operation and Maintenance Center for Switching OMD Operation & Maintenance Device* OMDST Operation & Maintenance Device Supervision & Test Block* OMG Object Management Group, ???? ????? ?? OMHP Operation & Maintenance Processor Hardware block, ?? ??? ?? OMI Open Microprocessor Initiative OMIBAC Ordinal Memory Inspecting Binary Automatic Computer OMID Operation and Maintenance Interface Device, ?? ?? ?? ???? OMID Operation Management Interface Device, ???? ????? ?? OMIS Common Management Information Services OMMI OMC Man-Machine Interface Block, ?? ??? ??? OMNIPoint Open Management Interoperability Point, ?? ??? OMP Object Modelling Technique OMP Operation & Maintenance Processor, ???? ???? OMP Operation and Maintenance Processor, ???? ????* OMP Operation Maintenance Processor, ???? ???? OMPR Optical Mark Page Reader OMR Optical Mark Reader, ?? ?? ??? OMS Open Measurement Solution, ??? ?? ??? OMS Operation and Maintenance Subsystem, ???? ????? OMS Orbotal Maneuvering System OMT Object Modeling Technique, ?? ????, ???? ????, OMT? OMT Orthomode Transition OMT Overhead Message Train ONA Open Network Architecture, ??? ???? ??, ?? ???? ???? ONC Off-Net Calling ONC Open Network Computing ONCB OMC Network Connection Block, ???? ? ??? ONN Open Network Node, ?? ???? ?? ONP Open Network Provision, ??? ???? ?? ONR Office of Naval Research ONR Overload Noise Ratio, ??? ??? ONT Optical Network Termination ONU Optical Network Unit, ? ??? ??, ? ??? ? ?? ?? OO Object-Oriented, ?? ?? OOA Object-Oriented Analysis, ?? ?? ?? OODB Object-Oriented DataBase, ?? ?? ?????? OODBMS Object-Oriented DataBase Management System, ?? ?? ?????? ?? ??? OODDL Object-Oriented Data Definition Language, ?? ?? ?????? ?? ?? OOF Out-of-Frame* OOK On-Off Keying OOL Operator Oriented Language OOMW Object-Oriented Multimedia Workbench OOP Object-oriented programming, ?? ??? ????? OOPS Off-Line Operating Simulator OOUI Object-Oriented User Interface, ?? ?? ??? ????? OP-AMP Operational Amplifier, ?? ??? OPAC On-line Public Access Catalog OPC OPerator Call, ???? ??? ???? ?? OPC Operator Position Circuit/Controller OPC Organic Photoconducting Cartridge OPC Origination Point Code(Signaling System No. 7) OPC Own Point Code OPDU Operation Protocol Data Unit, ?? ???? ??? ?? OPP Octal Print Punch OPP Opposite OPP Optical Port Processor, ?? ?? ??? OPR Optical Page Reader OPS On-Line Process Synthesizer OPSIC Operators Identification Code OPT Open protocol Technology OPT Output Port Controller OPT OutPut Transformer, ?? ??? OPTUL Optical Pulse Transmitter Using Laser OQL OODB Query Language OQPSK Offset Quadrature Phase Shift Keying, ??? ?? ?? ?? ?? OQPSK Staggered Quadrature Phase Shift Keying OR Operations Research, ????? ??? ORB Object Request Broker ORBIT-I Orbital Spacing Optimizer Version I, ?? ?? ??? ???? ORD Optical Rotary Dispersion ORDVAC Ordnance Variable Automatic Computer ORI Operational Readiness Inspection ORT Operational Readiness Test ORTLR Originating Translator, ??? ?? ??? ORTS Oracle Real Time Server, ??? ??? ?? OS Operating System, ?? ??, ????? ???, ?? ??? OS VS2 Operating Syste Virtual System 2 OS-links OverSampled Links OS/2 Operating System/2, ???? OS/2 EE Operating System/2 Extended Edition OS/VS Operating System/Virtual Storage, ?? ?? ?? ?? OSAM Overflow Sequential Access Method, ?? ?? ?? ??? ?? OSC Oscillator, ?? ??? OSD Office of the Secretary of Defense OSD On Screen Display OSDP One-State DP (??) OSE Open System Environment, ??? ??? ??, ?? ??? ?? OSF Open Software Foundation, ?? ????? ?? OSF Open System Foundation OSF Order Statistics Filter, ?? ?? ?? OSI Open System Interconnection OSI Open System Interconnection, ??? ??? ? ?? ??, ?? ??? ?? ?? OSI Open Systems Interconnect, ??? ???, ???? OSI Open Systems Interconnection, ??? ???, ???? OSI RM Open System Interconnection Reference Model OSI TP Open Systems Interconnection Transaction Processing, OSI ???? ?? OSIE Open Systems Interconnection Environment, ?? ??? ?? ?? OSIP Open Systems Interconnection Profile, ?? ??? ?? ???? OSM Off-Screen Model OSPF Open Shortest Path First, ?? ?? ?? OSPG Open Client/Server System Partners Group, ?? ?????·?? ?? ??? OSPS Operator Service Position System, ???? ?? ????? ????? OSR Optical Scanning Recognition OSR Optical Solar Reflector OSS Operating System Subsystem, ???? ????? OSS Optional Service Subsystem OSW Optical Switch OSZT One Side Z Transform, ?? Z ?? OTA Operational Trans-Conductance Amplifier OTAC Ordnance Tank Automotive Command OTAR Over The Air Registration, ??? ?? ? ?? ?? ?? OTAR Over The Air Registration, ?? ?? ?? OTDR Optical Time Domain Reflectometer, ???? ??? ???? OTDR Optical Time-Domain Reflectometer (method), ???? ??? ???? OTM Online tellers Machine, ??? ??? ?? OTPROM One Time Programmable Read Only Memory, 1?? ???? ?? ?? ?? ??? OTPROM One Time Programmable ROM, 1?? ???? ?? ?? ?? ??? OTR OrthoTelephonic Response, ?? ?? ?? OTS Object Transaction Service OTS Once at a Time Search, ? ?? ?? OUP Originating User Prompter OVEAD Open View efd application daemon ovead open view efd application daemon OVPO Outside Vapor-phase Oxidation, ?????? OVR OverVoltage Relay, ??? ??? OVTE Optical Video Transmission Equipment, ??? ?? ?? OWC Order Wire Channel, ??? ??* OWS Office Workstation, ??? ??? ??? P Padding P Parity, ??? P Pico, ?? P Pointer, ??? P Poll bit, ? ?? P Positive Flag P PPPPPPPPPPPP ???????? P Predictive (picture), ???? ????? ????? P Predictive - picture, ???? ????? ????? P Priority, ???? P Protection, ?? P Sample Precision, ???? ??? ??? ??? P&P Plug & Play P-Code Protect Code, ?? ?? P-CON Presentation Connection, ?????? ?? P-COX Pencil COaXial, ?? ?? P-F Poll-Final bit, ?-?? ?? P-MAC Packet MAC P-N Positive-Negative P-N Project Number P-NNI Private Network-to-Network Interface P-pulse Position pulse P/D Protection Device, ?? ?? P/F Poll bit per Final bit P/S Parallel to Serial, ??-?? ?? P/S POTS Splitter P/Z/N Positive/Zero/Negative P1 Protocol 1, ???? 1 (MTAE) P2 Protocol 2, ???? 2 (UAE) P3 Primavera Project Planner P3 Protocol 3, ???? 3 (MTAE-SDE) PA Paging Area PA Phase Alignment, ???? PA Physical Address, ??? ?? PA Point-of-Attachment PA Power Amplifier, ?? ??? PA Pre Amplifier PA Pre Assignment, ?? ?? (??) PA Pre-Arbitrated PA PreAmble, ???? PAB Performance Analysis Block (IMT-2000) PABX Private Automatic Branch Exchange, ??? ?? ??, ??? ?? ?? ??, ?? ?? ?? ?? PAC Paging Area Controller PAC Pass-along Control (IMT-2000) PAC Pedagogic Automatic Computer PACC Product Administration and Contract Control system (UNIVAC) PACE Packaged Cram Executive (NCR) PACE Performance And Cost Evaluation PACE Precision Analogue Computing Equipment PACE Processing And Control Element, ?? ? ?? ?? PACE Programming Analysis Consulting Education PACER Program Assisted Console Evaluation and Review PACER Programmed Automatic Communications Equipment PACS Personal Access Communications System PACS Picture Archiving and Communication System, ?? ?? ?? ?? ??? PACS-UB Personal Access Communications System-Unlicensed B PACT Pay Actual Computer Time PACT Production Analysis Control Technique PACT Programmed Automatic Circuit Tester PAD Packet Assembler and Dissembler PAD Packet Assembler-Dissembler, ?? ????·??????, ?? ??·??, ?? PAD Packet Assembler/Dissembler PAD Packet Assembly and Disassembly PAD Packet Assembly Disassembly PAD Packet Assembly/Disassembly PAD Padding PAD Problem Analysis Diagram PAI Programmer Sppratisal Instrument PAL Phase Alternate Line PAL Phase Alternation by Line PAL Phase Alternation Line PALI Profile And Level Indication, ????? ??? ?? (MPEG) PALIS Property And Liability Information System PAM Personnel Accounting Management PAM Phase Amplitude Modulation, ?? ?? ?? PAM Pulse Amplitude Modulation, ?? ?? ??* PAMA Preassigned Multiple Access PAMR Public Access Mobile Radio PAMS Proceedings of the American mathematical Society PAP PCS Application Part PAP Public Access Profile PAR Parameter PAR Pel Aspect Ratio, ????? ????(??) ? (MPEG) PAR Precision Approach Radar, ?? ?? ??? PAR Program Appraisal and Review PAR Project Audit Report PARC Palo Alto Research Center PARCOR Partial Auto-Correlation, ???, ??? ?? ?? PARCOR Partial Correlation, ???, ??? ?? ?? PARD Precision Annotated Retrieval Display PAREX Programmed Accounts Receivable Extra Service PARP Proxy Address Resolution Protocol PARS Passenger Airlines Reservation System PART Parts Allocation Requirements Technique PARTNER Proof of Analog Results Through Numerically Equivalent Routine (Honeywell) PAS Program Address Storage PASC Pan American Standards Committee PASC Precision Adaptive Subband Coding, ?? ?? ???? ??? PASCAL Philips Automatic Sequence Calculator PASM PArtitionable Single Instruction stream Multiple Data stream PASS Program Aid Software Systems PASSIM President's Advisory Staff on Scientific Information Management PASTA Packet Arrivals See Time Average PAT Patent PAT Personalized Array Translator PAT Process And Tool oriented program PAT Programmer Aptitude Tester PATSY Program Automatic Testing System (ICT) PAU Performance Analysis Unit (IMT-2000) PAX Pilot Channel + Access Channel PAX Private Automatic Exchange PAX Processor Array Experiment PB Page Buffer PB Peripheral Buffer PB Personal Base station* PB Phonetically Balanced (audio term) PB Piggy Back PB Plug Board PB Publications Bulletin PB Push Button PBA Print Board Assembly PBDG Push Button Data Generator PBI Process Branch Indicator PBP PriorityBreak Point, ??????? ??? ??? ????? ?? ? ???? ?? ??? ???? ??? ?? (MPEG) PBP Push Button Panel PBS Paging Base Station PBS Personal Base Station PBS Pocket Bell Service, (??) PBS Public Broadcasting System PBUS Packet BUS, ?? ?? PBX Private Branch Exchange, ?????, ?? ?? ??, ?? ??, ?? ?? ?? ?? PBX/PABX Private Branch Exchange or Private Automated Branch Exchange PC Peak Counter PC Personal Computer, ??? ???, ??? ??? PC Presentation Connection, ?????? ?? PC Priority Control, ???? ?? PC Processor Cabinet PC Program Counter, ???? ???, ???? ??? PC Propagation Constant, ?? ?? PC Pseudo Contact, ???? ???? (?????) PC Pulsating current, ?? PC DOS Personal Computer Disk Operating System PCA Polar Cap Absorption phenomenon, ?? ?? ?? PCA Principle Component Analysis, ??? ?? (??) PCB Page Control Block, ??? ?? ?? PCB Parity Check Bit PCB Power Control Bit, ?? ?? ?? PCB Print Circuit Board, ?? ?? ?? PCB Printed Circuit Board, ?? ?? ?? PCB Program Communication Block, ???? ??? PCC Parity Check Code, ??? ?? ?? PCC Port Control Carrier PCC Program-Controlled Computer PCC Programmable Cross-Connect PCCA Processor Communication Control Board Assembly, ??????????? PCCA Processor Communication Controller board Assembly PCCB Paging Central Control Block* PCCB PCM Carrier Clock Board, PCM ?? ?? ??? PCCB-B PCM Carrier Clock Board-B, PCM ???? ?? ??? PCCH Physical Control Channel PCDP Punched Card Data Processing PCE Picture Coding Extension, ?? ??? ????? (MPEG) PCES Pages Central Earth Station PCF Point CF PCH Paging Channel PCI Paging Control Interface, ??? ?? ????? PCI Parallel Communication Interface, ?? ?? ????? PCI Pattern Correspondence Index(Intelligibility Measure) PCI Peripheral Command Indicator PCI Peripheral Component Interconnect bus, ?? ?? ?? ?? ?? PCI Peripheral Component Interconnect, ???? ?? ????(??) PCI Peripheral Component Interface PCI Port Control Interface PCI Process Check Interruption PCI Process Control Interface, ?? ?? ????? PCI Protocol Control Information, ???? ?? ??* PCIA Primary CEPT1 Interface, 1? CEPT1 ?? ??? PCIB Paging Central Interface Block* PCL Printed-Circuit Lamp PCL Printer Control Language, ??? ?? ?? PCLK Processor CLocK, ???? ?? PCLSP PC Lan Support Program PCM Package Command Manager PCM Plug Compatible Machine, ?? ??? PCM Plug Compatible Module PCM Pulse Code Modulation, ?? ?? ?? PCM Punched Card Machine, ?? ???, ?? ?? ?? ?? PCMCIA Personal Computer Memory Card International Association, ?? ??? ??? ??? ?? ?? PCME Packet Circuit Multiplex Equipment, ?? ?? ??? ?? PCMI Photo Chronic Micro Image (NCR) PCMS Punched Card Machine System PCN Personal Communication Network, ?? ??? PCN Personal Communications Network, ?? ??? PCO Procuring Contrast Offer PCON PCH Continuation PCOS Primary Communications Oriented System PCP Parallel Cascade Processor (Foxboro) PCP Primary Control Program PCP Process Control Processor PCP Processor Control Program PCP Program Change Proposal PCP Punched Card Punch PCPA Polar Cap Phase Anomaly, ?? ?? ?? PCQ Production Control Quantometer PCR Parent-Child Relationship PCR Peak Cell Rate, ?? ? ?? PCR Pen Character Recognition PCR Preventive Cyclic Retransmission, ??? ??? ??? PCR Program Clock Reference, ???? ?? ?? (MPEG) PCR Program Control Register PCR Punched Card Reader PCS Paging Central Station*, ??? PCS Personal Communication Service, ????, ??? ?? ???* PCS Personal Communication System, ??????, ?? ?? ???* PCS Personal Communications Services PCS Personal Conferencing Specification PCS Power Control Channel + Signaling Channel PCS Print Contrast Signal, ?? ??? PCS Punched Card System, ?? ?? ??? PCSW Paging Channel Software (IMT-2000) PCT Picture Coding Type, ?? ?? (MPEG) PCT Portable Camera-Transmitter PCWG Personal Conferencing Work Group, PC ?? ?? ?? ??? ?? PCX PCS Exchange, ?? ?? ?? ???* PD Peripheral Device, ?? ?? PD Phase Distortion, ???? PD Phase Shift, ?? ?? PD Photo Diode, ?? ???? PD Position Dial, ??? ??? PD Power Distribution, ?? ?? PD Processing Delay, ?? ?? PD Propagation Delay, ?? ?? PD Protection Device, ?? ?? PD Protective Device, ?? ?? ??, ?? ?? PD Protocol Discriminator (IMT-2000) PDA Patient Data Automation PDA Personal Data Assistant PDA Personal Digital Assistant, ??? ?????* PDA Personal Digital Assistants, ?? ?? ?? ???* PDA Probability Distribution Analyzer PDB Physical DataBase, ??? ?????? PDC Personal Digital Cellular* (??) PDC Power Distribution Cabinet PDCH Physical Data Channel PDCN Phone-Dependent Cepstral Normalization (??) PDE Picture Display Extension, ?? ????? ????? (MPEG) PDE Power Distribution Enclousre, ?? ??? ??? PDES Product Data Exchange using STEP PDF Package Definition File PDF Portable Document Format PDF Power Distribution Frame PDF Pre-emphasis and De-emphasis Filtering PDF Probability Density Function PDF Probability Distribution Function PDH Pleisynchronous Digital Hierarchy, ???? ??? ?? PDI Picture Description Instruction, ?? ??? ?? PDI Port Data Interface PDL Page-Description Language, ??? ?? ?? PDL Print Definition Language PDL Printed Device Logic PDL Procedure Definition Language PDM Phoneme Duration Model, ?? ?? ?? (??) PDM Product Data Management, ?? ?? ??, ?? ?? ?? PDM Pulse Density Modulation (IMT-2000) PDMA Polarization Division Multiple Access, ?? ?? ???? PDN Packet Data Network (IMT-2000) PDN Public Data Network, ?? ???? PDP Plasma Display Panel PDP Programmed Data Processor PDPS Part Data Processing System (Bell telephone) PDQ Programmed Data Quantizer PDR Precision Depth Recorder PDR Preliminary Data Report PDR Preliminary Design Review PDR Processed Data Recorder PDR Program Discrepancy Report PDR Program Document Requirement PDS Passive Double Star, ??? ?? ?? PDS Port Data Store PDS Processor Direct Slot, ???? ???? ?? PDS Program Data Source PDS Programmable Disc Subsystem (???) PDS Public Domain Software, ???????, ??? ??? ?????, ??????? PDT Page Descriptor Type PDTE Packet Data Terminal Equipment PDU Protocol Data Unit, ???? ??? ?? PDV Peak Detector Verifier PE Phase Encoded PE Phase Encoding, ?? ?? ??, ?? ??? ??, PE ?? PE Physical Entity (IMT-2000) PE Presentation Entity PE Processing Element, ?? ?? PE Professional Engineer PE Project Engineer PE Purchased Equipment PEC Phase Error Control, ?? ?? ?? PEC Photoelectric Cell PED Personnel Equipment Data PED Picture Extension Data PEE Phase Error Estimator, ?? ?? ??? PEER Project Engineer Evaluation Report PEF Pre-Emphasis Filter, ?? ?? ?? PEI Personal Endpoint Identifier PEI Picture Extra Insertion Information PEL Picture Element, pixel, ??, ?? Pel Picture Element, pixel, ??, ?? PEM Photoelectromagnetic PEM Privacy Enhanced Mail (PGP) PEP Program Evaluation Procedure PEPR Precision Encoding and Pattern Recognition PER Program Event Recording PERGO Project Evaluation and Review with Graphic Output PERL Practical Extraction and Reporting Language PERT Performance Evaluation and Review Technique, ???, ?? PERT Program Evaluation and Review Technique, ?? PERT/CPM Program Evaluation and Review Technique / Critical Path Method PES Packetized Elementary Stream, ??? ?? ???* PES Photoelectric Scanner PES Photoelectric Scanning PES Program Elementary Stream, ???? ?? ??? PESG Periodic Excitation Signal Generation, ??? ?? ?? ?? (??) PET Peripheral Equipment Tester PET Personal Electronic Transactor PET Personal Electronic Transactor computer PET Physical Equipment Table PET Position-Event-Time PEX PHIGS/PHIGS + Extention for X, ?? PF PicoFarad, ???? PF Poll/Final PF Progressive Frame, ? ??? ??????? ?? (MPEG) PF-KEY Program Function Key, ???? ?? ? PFB Polyphase Filter Bank, ????? ?? ??, ?? ?? ?? PFC Parallel Fortran Converter PFD Power Flux Density PFL Prefader listening PFM Paging Frame Modifier PFM Pulse Frequency Modulation PFR Programmed Film Reader system PFR Pulse Frequency PFR Tape Perforator PFT Paper, Flat Tape PG Pattern Generation PG Programmer Group PG Pulse Generator PGA Pin Grid Array, ? ??? ??, ? ??? ??? PGC Program Group Control, ???? ?? ?? PGCH PaGing Channel PGEC Professional Group on Electronic Computers PGEN Pattern Generator, ??? ???? PGP Pretty Good Privacy PGR Precision Graphic Recorder PGT PaGe Table PGT Page Table PH Packet Handler PH Page Heading PH Presentation Header, ?????? ?? PH-C Physical Connect, ?? ?? ?? PH-SAP Physical Access Point, ?? ??? ??? ? PH-SDU Physical Service Data Unit, ?? ??? ??? ?? PHCNT Phase Counter, ??? ??? PHD Parallel Head per track Disk PHENO Precise Hybrid Elements for Nonlinear Operations PHIGS Programmer's Hierarchical Interative Graphics Standard, ?????? ??? ?? ?? ??? ?? PHLAG Phillips Petroleum Load And Go system PHM Phase Modulation System PHP Personal Handy Phone, ??? ??? PHS Personal Handphone System, ?? ?? ?? ??? PHS Personal Handyphone Service PHSDU Physical Service Data Unit, ?? ??? ??? ?? PHY Physical (Layer), ?? ?? PHY Physical layer protocol, ??? ???? PHY Physical Protocol PI Inner code Parity, ?? ?? ??? PI Physical Interface, ??? ????? PI Priority Input, ???? ?? PI Protocol Identifier, ???? ??? PI Provider Identity PIA Peripheral Interface Adapter PIBA PSTN Interface Board Assembly (IMT-2000) PIC Parallel Interference Cancellation (IMT-2000) PIC Priority Interrupt Controller, ?? ?? ???? ??? PICA Power Industry Computer Application Conference PICA Printing Industry Computer Associates PICH Pilot Channel PiCH Pilot Channel PICS Productivity Improvement and Control System, ??? ?? ?? ??? PICU Priority Interrupt Control Unit PID Packet Identifier (MPEG) PID Personal Identification System, ?? ?? ??? PID Portable Identification Code PID Protocol Identifier PIE Parallel Instruction Execution PIE Parallel Interface Element PIE Plug-In Electronics PIE Public Information Exchange PIFS PCF Interface Spacing PILOT Printing Industry Language for Operation of Typesetting PIM Personal Information Management, ?? ?? ?? PIM Personal Information Manager, ?? ?? ?? ???? PIM Protocol Independent Multicast, ???? ?? ????? PIM-D Parallel Inference Machine based on the Dataflow model PIN Pending Interrupt Not PIN Personal Identification Number PIN-PD PIN - Photo Diode PING Packet InterNet Groper, ?? ??? ??? PINO Positive Input-Negative Output PIO Parallel Input Output PIO Parallel Input/Output, ?? ?·??, ??? ?·?? PIO Programmable input-Output chip, ???? ?? ?·?? ? PIO Programmed Input Output PIOCS Physical Input-Output Control System PIOCS Physical Input/Output Control System PIOCS Physical IOCS, ??? ICOS PIOU Parallel Input/Output Unit PIP Peripheral Interchange Program PIP Photointerpretive Program PIP Problem Input Preparation PIP Program In Progressor PIP Project on Information Processing PIR Peak Information Rate PISW Process Interrupt Status Word PIU Plug-In Unit PIU Programmable Interface Unit PJ Positive Justification PK Pragmatic Knowledge, ?? ?? (??) PKC Public Key Crytosystem, ??? ?? ??? PKD Public-Key Distribution System, ??? ???? PL Path Loss, (??) ?? ?? PL Product Liability, ??? ?? PL Production Language PL Programming Language PL/1 Programming Language/One PL/I Programming Language /I, vldpfdnjs PL/M Programming Language for Microprocessor, ????????? ????? ?? PL/S Programming Language for Systems PLA Programmable Logic Array, ???? ?? ?? ??, ?????? ?? ??? PLACE Programming Language for Automatic Checkout Equipment PLATO Programmed Logic for Automatic Teaching Operation, ????????? PLATO Programmed Logic for Automatic Teaching Operations PLATO Programmed Logic for Automatic Teaching Operations, ???, ?? ?? ??? ????? ?? PLATO-UK PLAnt TOxins-United Kingdom PLCC Plastic Leaded Chip Carrier PLCF Physical Layer Convergence Function PLCL Phase-Locked Control Loop, ??? ? ?? ??, ???? ???? PLCP Physical Layer Convergence Protocol, ?? ?? ?? ???? PLCSW Pilot Channel Software (IMT-2000) PLD Processor Load Data* PLD Programmable Logic Device, ???? ?? ?? ?? PLIANT PL/I Application Nucleus Tools PLIANT Procedural Language Implementing Analog Techniques (IBM) PLL Phase Locked Loop, ??? ? ??, ?????? PLL Phase-Locked Loop, ??? ? ??, ?????? PLL-PSK Phase Locked Loop - Phase Shift Keying PLMN Public Land Mobile Network (IMT-2000) PLMTN Public Land Mobile Telecommunication Networks PLN Probabilistic Logic Node PLO Phase-Locked Oscillator PLOAM Physical Layer OAM PLP Packet Level Procedure PLS Physical Layer Signaling, ?? ?? ?? PLT Program Library Tape PLU Phase Lock Unit PLU Phone-like Unit, ?? ?? ?? (??) PLUS PERT Life cycle Unified System (IBM) PLUS Program Library Update System PLUS Program Loading, Updating and Selection (Honeywell) PM Dialogue Model, ?? ?? (??) PM Performance Monitor, ??? ?? ?? PM Permanent Magnet PM Permanent Memory, ?? ?? PM Phase Modulation, ?? ?? PM Physical Media PM Physical Medium sublayer, ?? ?? ??? PM Physical Medium, ?? ?? PM Planned Maintenance PM Post Mortem PM Preventive Maintenance, ?? ?? ?? PM Procedures Manual PM Processor Module PM Pulse Modulation, ?? ?? PMA Physical Medium Attachment PMB Programmable Multiplexer Bank PMBS Packer-Mode Bearer Service PMC Program Marginal Checking PMC Pseudo Machine Code PMD Physical Media Dependent PMD Physical Media Dependent sublayer PMD Physical Medium Dependent (Layer) PMD Physical Medium Dependent, ??? ?? ?? PMD Post Mortem Dumps PME Picture Mux Enable, ?? ????????? ??? ?????? ?? ?(?) ???? ??? (MPEG) PMF Picture Mux Factor, ?? ????????? ?????? ??? ?? ??? ?????? ?? (MPEG) PMI Physical Medium Attachment PMI Physical Medium Interface, ??? ?? ????? PMIB Physical Medium Interface Block, ??? ?? ????? ?? PMN Performance Management (IMT-2000) PMO Picture Mux Order, ?? ????????? ?? ??? ?? ??? ???? ?? ?? (MPEG) PMOS P-Channel Metal-Oxide Semiconductor, P? ?? ??? ??? PMP Precision Mounting Platform PMR Pacific Missile Range PMRM Power Measurement Report Message PMS Processor, Memories and Switches PMS Program Management System PMS Project Management System PMTU Path Maximum Transmission Unit PMU Path Metric Unit, ?? ??? ?? PMU Power Monitor Unit, ?? ??? PMV Predicted Motion Vector PMX Packet Multiplexer PN Personal Numbering PN Pseudo Noise, ?? ?? PN Pseudo-random Noise PN code Pseudo Noise code, ?? ?? ?? PNA Parallel Network Architecture PNC Paging Network Controller* PNC PN Controller PNC Programmed Numerical Control PNEC Proceedings of the National Electronics Conference PNG Pink Noise Generator, ????? ??? PNM Pulse Number Modulation, ??? ?? PNNI Private Network-Network Interface, ????? ????-???? ????? PNNI Private Network-Node Interface, ????? ????-?? ????? PNNI Private NNI, ?? NNI PNP Private Numbering Plan* PO Outer code Parity, ?? ?? ??? PO Parallel Output PO Priority Output PO Purchase Order POC Process Operator Console POCSAG Post Office Code Standardization Advisory Group POD Point-of-Origin Device PODA Priority Oriented Demand Assignment POGO Programmer Oriented Graphics Operation POH Path Overhead, ?? ????, ?? ???? POI Point Of Initiation POI Point Of Interface POL Problem-Oriented Language, ?? ?? ?? PON Passive Optical Network, ?? ? ??? POP Point Of Presence POP Post Office Protocol, ??? ??? ???? POP Power On/off Projection POP Programmed Operator POP Programmed Operators and Primitives POPS Pantograph Optical Projection System POR Pacific Ocean Region (Intelsat) POR Point Of Return POR Problem Oriented Routine PORT Photo-Optical Recorder Tracker POS Point of Sale, ??, ?? ?? ?? ?? POS Point of Sales POS Point Of Sales system, ??? ?? ?? ?? ??? POS Probility Of Survival, ??? POS-FET POS Electronic Fund Transfer, ?? POS POSIX Portable operating system for computer Environments, ??? POSIX Portable operating system for interactive executives, ??? POST Power On Self Test POST Power-On Self-Test POTC PERT Orientation and Training Center POTS Plain Old Telephone Service, ?? ????? POTS Public Office Telephone System PP Packet Processor PP Pages PP Peak-to-Peak PP Peripheral Processor, ?? ???? PP Pilot Punch PP Play Pause, ?? ?? ?? PP Point Positioning, ?? ?? PP Portable Part PP Precise Point, ??? PP Preprocessor PP Print-Punch PP2S Pulse Per 2 Second PPA Professional Programmers Association PPC Plain Paper Copier PPC Power PC PPC Predicted Propagation Correction, ?? ?? ?? PPCI Presentation Protocol Control Information, ?????? ???? ?? ?? PPCS Pilot Channel + Power Control Channel + Signaling Channel PPDU Presentation Protocol Data Unit, ?????? ???? ???? PPE Problem Program Efficiency PPF Plain Paper Facsimile PPFB Polyphase Filter Bank, ????? ?? ?? PPH Per Position Height, ?? ??? PPI PDH Physical Interface PPI Primary Path Satellite PPI Programmable Parallel Interface, ???? ?? ?? ????? PPL Passive Photonic Loop PPM Part Per Million, 1???? 1 PPM Pulse Position Modulation, ?? ?? ??, ?? ?? ?? PPOS Peripheral Processor Operating System PPP Point to Point Protocol, ? ?? ? ????, ???-??? ???? PPP Point-to-Point Protocol, ? ?? ? ????, ???-??? ???? PPS Parallel Processing System, ?? ?? ??? PPS Precise Positioning Service, ?? ?? ??? PPS Pulse per Second, ?? ?? PPSDN Public Packet Switched Data Network PPSDN Public Packet-Switched Data Network PPSN Public Packet Switched Network PPT Part Per Trillion, 1??? 1 PPT Punched Paper Tape PPU Peripheral Processing Unit, ?? ?? ???? PPV Pay Per View, ?? ?? ?? PPW Per Picture Width, ?? ??? Pq Quantization Table Precision, ??? ???? ??? PQFP Plastic Quad Flatpack Package PR Page Response, ??? ?? PR Partial Response, ?? ?? (?????) PR Pattern Recognition PR Periodic Report PR Picture Rate, ??? ???? (MPEG) PR PRepare PR Print PR Procurement Requirement PR Proximity Recording, ?? ?? ?? (?????) PR Pseudo Range, ?? ?? PR Public Relation, ?? ?? PR Purchase Request PR-1 Print Register 1 PR-A Pre Amplifier PRA Pel Recursive Algorithm PRA Primary Rate Access, ??? (??) ?? PRA Print Alphamerically PRAM Parallel Random Access Memory PRB Primary Reference Burst PRBS Pseudo-Random Binary Sequence PRBS Pseudorandom Binary Sequence PRC Partial Response Channel, ?? ?? ?? PRCA Proportional Rate Control Algorithm, ?? ?? ?? ?? PRCB Paging Remote Control Block* PRD Program Requiremwnts Document PREP Powerpc Reference Platform PREP Programmed Educational Package (UNIVAC) PREP Project Return Evaluation Program PREPARE Plan for Retraining of Employable Persons as Related to EDP PRES Progressive Reduction Standard, ?????? ????? ?? ???? ??? ???? PRI Primary Rate access Interface PRI Primary Rate Interface (IMT-2000) PRIB Paging Remote Interface Block* PRIB Primary Rate Interface Board, 1?? ?? ??? ?? ??? PRIME Programmed Instruction for Management Education PRISM Programmed Integrated System Maintenance PRK Phase Reversal Keying = BPSK PRM Paging Response Message, ??? ?? ??? PRM Premium Rate PRM Protocol Reference Model, ???? ?? ?? PRMA Packet Reservation Multiple Access PRMD Private Management Domain, ?? ?? ??, ?? ?? ?? PRML Partial Response Maximum Likelihood, ?? ?? ?? ??? (?????) PRNC Pseudo Random Noise Code, ?? ?? ?? PRO Precision RISC Organization, ?? PROFIT Programmed Reviewing, Ordering, and Forecasting Inventory Technique (Honeywell) PROLOG PROgramming LOGic PROM Programmable Read Only Memory, ??, ???? ?? ROM PROMOCOM Project Monitor and Control Method PROMPT Program Monitoring and Planning Techniques PRONTO Program for Numerical Tool Operation PROP Performance Review for Operating Programs PROXI Projection by Reflected Optics from Xerographic Images Proxy ARP Proxy Address Resolution Protocol, ?? ARP, ?? ?? ?? ???? PRP Pseudorandom Pulse PRR Pulse Repetition Rate PRR Pulse-Repetition Rate PRS Paging Remote Station*, ??? PRS Partial Response Detection PRS Pattern Recognition Society PRS Pattern Recognition System, ?? ?? ??? PRS Peak Rate Spacer PRS Pointer Register Slave PRS Position Register Sender PRS Position Reporting System, ?? ?? ??? PRS Prediction Residual Signal, ?? ?? ?? (??) PRS Primary Reference Source PRT Primary Reference Terminal PRT Printer PRU Pacing Rate Unit PRUG Packet Radio User's Group, ???, ?? ??? ??? ?? PRV Peak Reverse Voltage PRW Percent Rated Wattage PS Packet Switching, ???? PS Parity Switch PS Personal Station, ???* PS Pico Second PS Planning and Scheduling PS Point of Shipment PS Power Splitter PS Power Supply PS Presentation Service, ?????? ??? PS Pressure-Sensitive PS Previous Station PS Processor Sharing PS Program Stream, ???? ??? PS Programmable Switch PS Progressive Sequence, ??????? ?? (MPEG) PS Protection Switching PS Pulse Shaper PS Spontaneous Polarization PS/2 Personal System 2 PSA Pilot/Synchronous/Access Channel Element* PSA Primary & Secondary Accumulator, 1? ? 2? ??? PSAA Port Switching Adapter Assembly PSAP Presentation Service Access Point, ?????? ??? ??? ??? PSAP Presentation Service Access Point, ?????? ??? ???? PSAR Programmable Synchronous/Asynchronous Receiver PSAT Programmable Synchronous/Asynchronous Transmitter PSB Program Specification Block PSC Peripheral Systems Corporation PSC Picture Start Code, ?? ?? ?? (MPEG) PSC Public Service Commission, ???????(??? ? ?) PSC Pulse per SeCond, ?? ?? PSCAN Progressive Scan, ???? PSCS PagerSat System Central Station State PSD Port Sharing Device PSD Program Stream Directory PSDN Packet Switched Data Network, ?? ??? PSDN Packet Switching Data Network, ?? ??? PSDN Packet-Switched Data Network, ?? ??? PSDN Public Switched Data Network, ?? ??? ???, ?? ?? ???? PSDN Public Switching Data Network, ?? ??? ??? PSDU Presentation Service Data Unit, ?????? ??? ??? ?? PSF Pitch Synthesis Filter, ?? ?? ?? (??) PSF Protection Switching Failure PSG Phrase Structure Grammar, ? ?? ?? (??) PSG Programmable Sound Generator, ???? ?? ?? PSI Pressure Sensitive Identification PSI Proto Syntax Indexing PSI-CELP Pitch Synchronous Innovation CELP (??) PSID Personal Station Identification PSJ Pulse Stuffing Justification, ?? ?? PSK Phase Shift Keying, ?? ?? ??, ?? ?? ?? PSM Program Stream Map PSM Protocol State Machine PSN Packet Satellite Networks = TRMA PSN Packet Switch Node, ?? ??? ?? PSNR Peak Signal-to-Noise Ratio, ?? ?? ? ??? ? PSOLA Pitch Synchronous Overlap Add (??) PSOLA Pitch Synchronous Overlap and Add (??) PSOLA Pitch Synchronous Overlap-Add (??) PSP Phrase Structure Parser, ? ?? ?? (??) PSP Power System Planning (IBM) PSP Program Segment Prefix PSPARE Picture Layer Spare Information, ?? ? ???? PSPDN Packet Switched Public Data Network* PSPDN Packet-Switched Public Data Network PSR Previous Slot Release PSR Processor State Register PSRAM Pseudo SRAM, ?? SRAM PSS Physical Signaling Sublayer, ??? ?? ????? PSS Power Spectral Subtraction, ?? ???? ??? (??) PSS Pre-stored Speaker, ?? ??? ?? (??) PSS Proprietary Software Systems PSSE Picture Spatial Scalable Extension, ?? ?? ????? ????? (MPEG) PST Processor STatus, ???? ?? PSTC Paging Switch Telephone Network PSTN Present STN, ????? PSTN Public Switched Telephone Network, ?? ?? ???, ?? ?? ???* PSTN Public Switched Toll Network PSTN Public Switching Telephone Network, ?? ?? ???* PSTR Picture Structure (MPEG) PSU Port Sharing Unit, ??? ?? ?? PSU Port Switch Unit PSU Power Supply Unit, ?? ?? ?? PSW Program Status Word, ???? ????? ??, ???? ??? PSYCO Princeton Syntax Compiler PT Packet Mode Terminal, ?? ?? ??* PT Packet Model Terminal PT Page Table PT Paper Tape PT Paper Type PT Part Time PT Partially Tested PT Path Trace, ?? ?? PT Payload Type, ?? ?? ??* PT Pencil Tube PT Performance Test PT Please Token PT Please Tokens PT Point PTC Pacific Telecommunications Council PTC Paper tape Controller PTC Proctor Test Set, ??? ??? ?? PTC Programmed Transmission Control (IBM) PTE Path Termination Equipment PTE Peculiar Test Equipment PTI Packet Type Identifier PTI Payload Type Identifier, ?? ?? ??? PTL Payload Test Laboratory, ?? ?? ?? ?? ?? PTL Phase Tracking Loop, ?? ?? ?? PTM Pulse Time Modulation PTMP Point-to-MultiPoint PTN Personal Telecommunication Number PTN Personal Telecommunications Number PTP Paper Tape Punch, ?? ??? ?? ??, ?? ??? ??? PTP Point-to-Point Network, ?? ??? PTP Point-to-Point, ?? ??(?) PTR Paper Tape Reader, ?? ??? ??? PTR Pointer, ??? PTR Provider Trouble Report PTRP Paper Tape Reader-Switch PTS Presentation Time Stamp (MPEG) PTS Proceed-To-Send signal, ?? ?? ?? PTSE Picture Temporal Scalable Extension, ?? ?? ????? ????? (MPEG) PTT Ministere des Postes et Telecommunications et de la Telediffusion, ?? ?? ??? PTT Ministry of Posts, Telegraphs and Telephones, ??·??·?? ??? ???, ??? PTT Post Telephone and Telecommunications, ??? PTT Postal Telephone and Telegraph PTT Press To Talk PTT Press-To-Talk PTT Program Test Tape PTT Push To Talk PTYPE Picture Type Information, ??? ?? ?? PU Physical Unit, ?? ?? PU PickUp PU Power Unit PU Push to Talk PU 2. 1 Physical Unit 2. 1, ?? ?? 2. 1 PU 4 Physical Unit 4, ?? ?? 4 PU 5 Physical Unit 5, ?? ?? 5 PUC Public Utilities Commission PUDL Push Down List PUFFT Purdue University Fast FORTRAN Translator PUP Palo Alto Research Center Universal Protocol PUP PARC Universal Protocol, ?? ???? ???? PUP Peripheral Unit Processor PureALOHA Pure ALOHA PUSAS Proposed USA Standard PUT Programmable Unijunction Transistor PV Phase Vocoder, ?? ??? PVC Permanent Virtual Call PVC Permanent Virtual Channel (IMT-2000) PVC Permanent Virtual Circuit, ?? ?? ??, ?? ?? ??, ?? ?? ?? PVC Permanent Virtual Connection, ?? ?? ?? PVC Polyvinyl chloride PVD Primary Volume Description PVE Polyvinyl Chloride PVM Parallel Virtual Machine PVN Private Virtual Network PVR Precision Voltage Reference PVS Power Visualization System PVSC Point-to-point Virtual Signaling Channel, ??? ?? ?? ?? PW Plane Wave, ??? PW Pulse Width, ?? ? PWB PWB/UNIX system PWC Pulse-Width Code PWD Pulse-Width Discriminator PWE Perceptually Weighted Error, ?? ?? ?? (??) PWE Pulse-Width EncoderCode PWF Perceptually Weighted Filtering, ?? ?? ??? (??) PWHK NT Power Supply H/W block PWM Pulse Width Modulation, ?? ? ?? PWORD Penta-WORD PZM Pressure Zone Mic Q QQQQQQQQQQQQ ???????? Q Quiet Q&D Quick And Dirty QA Q Adapter QA Query Analyzer QA Question and Answer, ?? ?? QA Queue Arbitrated, ?? ?? QA Queued Arbitrary, ?? ?? QA Queued-Arbitrated QADS Quality Assurance Data System QAF Queued Arbitrated Function.