| P-SRAM | Pseudo-Static RAM | - | Human Genome |
| P3P | Platform For Privacy Preferences | - | Human Genome |
| PAD | Portable Application Description | - | Human Genome |
| PAL | Phase Alternating Line | - | Human Genome |
| PAL | Programmable Array Logic | - | Human Genome |
| PAN | Personal Area Network | - | Human Genome |
| PAP | Password Authentication Protocol | - | Human Genome |
| PB SRAM | Pipelined Burst Static RAM | - | Human Genome |
| PBX | Private Branch Exchange | - | Human Genome |
| PC | Personal Computer | - | Human Genome |
| PC/TV | Personal Computer And Television | - | Human Genome |
| PCB | Printed Circuit Board | - | Human Genome |
| PCI | Peripheral Component Interface | - | Human Genome |
| PCL | Printer Control Language | - | Human Genome |
| PCM | Pulse Code Modulation | - | Human Genome |
| PCMCIA | Personal Computer Memory Card International Association | - | Human Genome |
| PCS | Personal Communications System | - | Human Genome |
| PDA | Personal Digital Assistant | - | Human Genome |
| PDC | Primary Domain Controller | - | Human Genome |
| PDF | Portable Document Format | - | Human Genome |
| PDL | Page Description Language | - | Human Genome |
| PE | Portable Executable | - | Human Genome |
| PERL | Practical Extraction And Report Language | - | Human Genome |
| PFR | Portable Font Resource | - | Human Genome |
| PGA | Pad Grid Array | - | Human Genome |
| PGA | Pin Grid Array | - | Human Genome |
| PGA | Professional Graphic Adapter | - | Human Genome |
| PGM | Pragmatic General Multicast / Pretty Good Multicast | - | Human Genome |
| PGP | Pretty Good Privacy | - | Human Genome |
| PHB | Photochemical Hole Burning | - | Human Genome |
| PHP | PHP Hypertext Preprocessor (Personal Home Page) | - | Human Genome |
| PIC | Programmable Interrupt Controller | - | Human Genome |
| PICNIC | Problem In Chair, Not In Computer | - | Human Genome |
| PIF | Program Information File | - | Human Genome |
| PIM | Personal Information Manager | - | Human Genome |
| PIN | Personal Identification Number | - | Human Genome |
| PING | Packet Internet Groper | - | Human Genome |
| PIO | Programmed Input Output | - | Human Genome |
| PIP | Peripheral Interchange Program | - | Human Genome |
| PISO | Parallel-In/Serial-Out | - | Human Genome |
| PITA | Pain In The Ass / Arse | - | Human Genome |
| PJTF | Portable Job Ticket Format | - | Human Genome |
| PKI | Public Key Infrastructure | - | Human Genome |
| PLA | Programmable Logic Array | - | Human Genome |
| PLD | Programmable Logic Device | - | Human Genome |
| PMML | Predictive Modeling Markup Language | - | Human Genome |
| PMS | Pantone Matching System | - | Human Genome |
| PMT | Photomultiplier Tube | - | Human Genome |
| PNG | Portable Network Graphics; Image Format | - | Human Genome |
| PNP | Plug And Play | - | Human Genome |
| POP | Post Office Protocol | - | Human Genome |
| POS | Pivoting Optical Servo | - | Human Genome |
| POSIX | Portable Operating System Interface For UNIX | - | Human Genome |
| POST | Power On Self Test | - | Human Genome |
| POTS | Plain Old Telephone Service | - | Human Genome |
| PPCP | PowerPC Platform | - | Human Genome |
| PPM | Pages Per Minute | - | Human Genome |
| PPP | Point-to-Point Protocol | - | Human Genome |
| PPPTP | Point-to-Point Tunneling Protocol | - | Human Genome |
| PQDIF | Power Quality Data Interchange Format | - | Human Genome |
| PRAM | Parameter RAM | - | Human Genome |
| PRI | Primary-Rate Interface | - | Human Genome |
| PRL | Packetized Residential Lifeline | - | Human Genome |
| PROM | Programmable Read-Only Memory | - | Human Genome |
| PSTN | Public Switched Telephone Network | - | Human Genome |
| PTH | Plated Through-Hole | - | Human Genome |
| PUP | Potentially Unwanted Program | - | Human Genome |
| PURL | Persistent URL | - | Human Genome |
| PVC | Permanent Virtual Circuit | - | Human Genome |
| PWB | Printed Wire Board | - | Human Genome |
| PAB | Personal Address Book
| - | Human Genome |
| PagS | Paging Service
| - | Human Genome |
| PAO | Product and Service Assurance Office
| - | Human Genome |
| PAR | Personnel Action Request
| - | Human Genome |
| PARTIES | Protected Area Run Time Interface Extension Services
| - | Human Genome |
| PAT | port address translation
| - | Human Genome |
| PAV | percentage allocation value
| - | Human Genome |
| PBIP-VPNS | Premises-Based-Internet Protocol Virtual Private Network Services
| - | Human Genome |
| PBSA | Performance-Based Service Acquisition
| - | Human Genome |
| PCE | path computation element
| - | Human Genome |
| PC(O) | permanent connection (optical)
| - | Human Genome |
| PCO | Procuring Contracting Officer
| - | Human Genome |
| PCR | peak cell rate
| - | Human Genome |
| PDN | pseudo destination number
| - | Human Genome |
| PDU | protocol data unit
| - | Human Genome |
| PDU(DHS) | power distribution unit
| - | Human Genome |
| PED | price engine documentation
| - | Human Genome |
| PEP | performance enhancement proxy
| - | Human Genome |
| PERCEVAL | performance evaluator
| - | Human Genome |
| PFL | performance factor level
| - | Human Genome |
| PG | peripheral gateways
| - | Human Genome |
| PIA | Private Impact Assessment
| - | Human Genome |
| PICC | pre-subscribed interexchange carrier charge
| - | Human Genome |
| PIR | peak information rate
| - | Human Genome |
| PKCS | Public Key Cryptography Standards
| - | Human Genome |
| PL | private line
| - | Human Genome |
| PLS | private line service
| - | Human Genome |
| PLxML | Phone Line Extensible Markup Language
| - | Human Genome |
| PMD | polarization mode dispersion
| - | Human Genome |
| PMM | price management mechanism
| - | Human Genome |
