- perpendicular scan
- perpendicular space
- perpendicularity
- perpendicularly
- persistent
- persistent lock
- personal
- personal code
- personal document
- personal error
- perspective colineation
- perspective element
- perspective elements
- perspective position
- perspective projection
- perspective transformation
- perspectivity
- pertain
- perturb
- petrol
- petrol tank
- pgup
- phantom signal
- phase
- phase adapter
- phase area
- phase constant
- phase control
- phase conversion
- phase converter
- phase correction
- phase difference
- phase discriminator
- phase displacement
- phase equalizer
- phase error
- phase function
- phase instability
- phase inversion
- phase inverter
- phase jitter
- phase modulation
- phase modulator
- phase monitor
- phase multiplier
- phase resolution
- phase resonance
- phase response
- phase reversal
- phase selection
- phase shift
- phase simulator
- phase-locked
- phasing line
- phasing signal
- phenol
- phenolic
- phenomena
- phi function
- pholoelectromagnetic effect
- phone line
- phone mail
- phono plug
- photochromic recording
- photoconduction electron
- photoconductive device
- photoconductive meter
- photoconductivity gain
- photodigital memory
- photoelectric constant
- photoelectric control
- photoelectric material
- photoelectric reader
- photoelectric sensing
- photoelectric timer
- photoemissivity
- photographic recording
- photomultiplier
- photophone
- photoplotter
- photoreceptor
- photosensitivity
- phototypesetter
- physical dimension
- physical file
- physical media
- physical node
- physical partition
- physical resource
- physical segment
- physical swapping
- physical twins
- pi filter
- pick
- pick path
- picking region
- pictorial character
- picture analyzer
- picture cues
- picture element