Abbreviations

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	p	Pico (10 - 12)
	p.a.m.	Pulse amplitude modulation
	p.r.f.	Pulse repetition frequency
	PA	Public address
	PA	Poly Amide (Nylon)
	PABX	Private automatic branch exchange
	PAL	Phase alternation, line
	PAL	Phase Alternating Line
	PAT	Portable Appliance Tester
	PBT	Polybbutylene Terephthalate
	PBX	Private branch exchange
	PC	Poly Carbonate
	pc	piece
	PCB	Printed circuit board
	pce	piece
	PCI	Peripheral Component Interconnect
	PCM	Pulse code modulation
	PCMCIA	Personal Computer Memory Card International Association
	PCP	PolyChloroprene (Neoprene)
	PCTFE	Poly Chloro Tri Fluoro Ethylene
	PCW	Plain Copper Wire
	Pd	Palladium
	PDF	Portable Document Format
	PE	Polyethylene
	pF	Pico Farad
	pF/m	Pico Farad per metre
	PG	Panzerrohr Gewinde ( Conduit Thread )
	pH	Potential of Hydrogen
	PICMG	PCI Industrial Computer Manufacturers Group
	PIDG	Pre-Insulated Diamond Grip
	PLA	Programmable logic array
	PLC	Programmable Logic Controller
	PLL	Phase locked loop
	PMOS	Positive channel metal oxide semiconductor
	PNG	Portable Network Graphics
	PNP	Positive, Negative, Positive (Transistor)
	POS	Point of Sale
	PP	Polypropylene
	ppm	Parts per Million
	PPO	Polyphenylene Oxide
	PROM	Programmable read only memory
	PRT	Platinum Resistance Thermometry
	PS	Polystyrene
	PSI	pounds per square inch
	PSS	Packet SwitchStream
	PSTN	Public Switched Telephone Network
	PSU	Power supply unit
	Pt	Platinum
	Pt100	Platinum Resistance Temperature Probe
	PTB	Physikalisch Technische Bundesanstalt (German Test Agency)
	PTC	Positive Temperature Coefficient
	PTFE	Poly Tetra Fluoro Ethylene
	PU	Pickup
	PUJT	Programmable unijunction transistor
	PUR	Polyurethane
	PVC	Poly Vinyl Chloride
	PVDF	Poly Vinylidine Fluoride
	PWM	Pulse Width Modulation