Engineering Abbreviations
"A",
"B",
"C",
"D",
"E",
"F",
"G",
"H",
"I",
"J",
"K",
"L",
"M",
"N",
"O",
"P",
"Q",
"R",
"S",
"T",
"U",
"V",
"W",
"X",
"Y",
"Z"
'Pa' to 'Pl, 'Pm' to 'Pq', 'Pr' to 'Pz'
| p | - | pico (10-12), peta (1015) |
| PABX | - | private automatic branch exchange |
| PAD | - | packet assembler/disassembler |
| PAL | - | Programmable Array Logic [PLD manufacturers] |
| PAL | - | phase alternation by line |
| PAL-M | - | phase alternation by line-modified |
| PAM | - | pulse-amplitude modulation |
| PAMA | - | pulse-address multiple access |
| PAN | - | Personal Area Network |
| p/a r | - | peak-to-average ratio |
| PAR | - | performance analysis and review |
| PARAMP | - | parametric amplifier |
| par | - | meter peak-to-average ratio meter |
| PAX | - | private automatic exchange |
| Pb | - | lead |
| PBA | - | Physical Block Address |
| PBER | - | pseudo-bit-error-ratio |
| PBGA | - | Plastic Ball Grid Array [PBGA description] |
| PBIT | - | Power-up BIT |
| PBX | - | private branch exchange |
| PC104 | - | Embedded PC card [PC-104 Description] |
| PC | - | Personal Computer, carrier power (of a radio transmitter) |
| PCB | - | printed circuit board, power circuit breaker [PWB Terms] |
| PCB | - | polychlorinated biphenyl |
| PCC | - | Plastic Chip Carrier |
| PCIB | - | Protocol Control Information Bus [IEEE P1386.1] |
| PCI | - | Peripheral Component Interface [Computer Bus] |
| PCIe | - | Peripheral Component Interface Express [PCIe Bus] |
| PCM | - | pulse-code modulation [PCM code definitions] |
| PCM | - | Phase-Change Memory [ PCM IC Manufacturers] |
| PCM | - | plug compatible module, process control module |
| PCMCIA | - | Personal Computer Memory Card International Association |
| PCN | - | Popcorn Noise [out-of-date-term] |
| PCS | - | Personal Communications Services |
| PCS | - | plastic-clad silica [fiber] |
| PCSR | - | parallel channels signaling rate |
| PD | - | photodetector |
| PD | - | Pulse Duration [PD definition] |
| - | Portable Document Format | |
| PDH | - | Plesiochronous Digital Hierarchy |
| PDM | - | pulse-duration modulation, pulse delta modulation |
| PDN | - | Power Distribution Network |
| PDN | - | public data network |
| PDP | - | Programmed Data Processor |
| PDS | - | power distribution system, protected distribution system |
| PDS | - | program data source |
| PDT | - | programmable data terminal |
| PDU | - | protocol data unit [Protocol definitions] |
| PE | - | phase-encoded [recording] |
| PEP | - | peak envelope power (radio transmitter) |
| pF | - | picofarad, power factor |
| PFC | - | Power Factor Correction [PFC Converters] |
| PFM | - | pulse-frequency modulation |
| PGA | - | Pin Grid Array [PGA Graphic] |
| PGA | - | Programmable Gain Amplifier |
| PHEMT | - | pseudomorphic high electron mobility transistor |
| PHY | - | Physical Layer |
| PI | - | 3.1415927, protection interval |
| PIB | - | Processor in a Box |
| PIC | - | plastic insulated cable |
| PIN | - | Part Identifying Number |
| ping | - | packet Internet groper |
| PIR | - | Passive IR [Infrared] |
| PISA | - | PC Expansion Bus [PCI + ISA], [Card Manufacturers] |
| PIV | - | Peak Inverse Voltage |
| PLA | - | programmable logic array |
| PLC | - | Power Line Communication |
| PLC | - | Printer Control Language [HP Printer Language] |
| PLC | - | Programmable Logic Controller [PLC Manufacturers] |
| PLCC | - | Plastic Leaded Chip Carrier [Package Types] |
| PLD | - | Programmable Logic Device [PLD IC Manufacturers] |
| PLL | - | phase-locked loop |
| PLMR | - | Private Land Mobile Radio |
| PLN | - | private line network |
| PL/I | - | programming language 1 |
| PLR | - | pulse link repeater |
| PLS | - | physical signaling sub-layer |
