| Person-to-Person |
| Platform for Privacy Preferences Project | | Private Automatic Branch eXchange | | Parametric Audio Coding | | Personal Access Communications System | | Packet Assembler-Disassemble | | Phase Alternation Line | | Phase Alternating by Line | | Phase-Alternating Line - NTSC format | | Pulse Amplitude Modulation | | Personal Area Network | | Password Authentication Protocol | | Program Association Table | | Parallel Basic Linear Algebra Subprograms | | Private Branch eXchange | | Personal Computer | | Printed Circuit Board | | Peripheral Component Interconnect | | Personal Communications Industry Association | | Pulse Code Modulation | | Personal Computer Memory Card Industry Association | | Personal Communications Networks | | Private Cable Operator | | Program Clock Reference | | Physical Coding Sublayer | | Personal Communications Services | | Path Coding Violation Error Event | | Personal Digital Assistant | | Personal Digital Assistant | | Personal Digital Cellular (Japan) | | Position Determining Entity | | Positioning Determination Entity | | Plesiochronous Digital Hierarchy | | Packet Data Network or Public Data Network | | Protocol Data Unit | | Protected Extensible Authentication Protocol | | Permanent engaged tone | | Planned engineering works | | Packet Generalized Processor Sharing | | Physical Layer | | Personally Identifiable Information | | Processor In Memory | | Personal Information Manager | | Protocol Independent Multicast- Dense Mode | | Protocol Independent Multicast - Sparse Mode | | Personal Identification Number, or Positive-Intrinsic-Negative | | Packet internet groper | | Picture in Picture | | Patent Licensing and Enforcement Companies | | Public Land Mobile Network | | Protection Layer Protocol Data Unit | | Phase Modulation | | Physical Medium Attachment | | Physical Medium Dependent | | Physical Media-Dependent | | Presence Network Agent | | Plug-and-Play | | Perceptual Noise Substitution | | Point of Deployment Module | | Point of presence | | Point Of Presence | | Point Of Sale | | Plain Old Telephone Service | | Plain Old Telephone Service | | Pay-Per-Call | | Predictive-coded Picture | | Point to Point Protocol | | Point-to-Point Protocol | | Point to point protocol over asynchronous transfer mode | | Point to point protocol over ethernet | | Pay-Per-View | | Pay-Per-View | | Philips Radio Communications Systems | | Primary Rate Interface | | Primary Rate Interface (ISDN) | | Privacy and Identity Management for Europe | | Programmable Read-Only Memory | | Phase Shift Keying | | Packet-Switched Network | | Public Switched Telephone Network | | Public Switched Telephone Network | | Power supply unit | | Payload Type | | Precision testing officer | | Post, Telegraph and Telecommunications (Government Departments) | | Physical Unit (IBM SNA) | | Public Utility Commission (USA) | | Permanent virtual circuit | | Permanent Virtual Circuit | | Permanent virtual circuit connection | | Private Virtual Network | | Personal Video Recorder |
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