- propagation mode
- propagation velocity
- property detector
- propulsion bay
- protecting channel
- protection ratio
- program card
- program channel
- program controller
- program maintenance
- program management
- program relocation
- program trace
- programme element
- programme grading
- programme increase
- programme leader
- programme selector
- programme track
- programming technical
- progressive grading
- projection
- projection diode
- projective module
- prompting facility
- proprietary name
- propulsion efficiency
- propelling nozzle
- proper time
- proportional function
- protecting location
- protecting memory
- proximity effect
- proximity mask
- pseudo code
- psophometric network
- psophometric voltage
- public booth
- public borrowing
- public correspondence
- proton spectrometer
- provident fund
- provider
- proving period
- pseudosonic profile
- psophometer
- psophometer filter
- pulse characteristics
- pulse converter
- pulse duration
- pulse emission
- pulse FM
- pulse frequency
- pulse function
- pulse laser
- pulse polarity
- pulse propagation
- pulse response
- pulse signal
- pulse string
- pulse stuffing
- pulse system
- pulse technical
- pulse time
- pulse waveform
- pulsed emission
- pulsed laser
- pulsed operation
- pump frequency
- pumping derrick
- pumping light
- punch-through
- purchase order
- Q code
- quadraphony
- quadratic distortion
- quadrature component
- quadrature demodulator
- puncture
- pure signal
- push-button
- push-push
- pyroelectric detector
- quadrifilar winding
- qualification model
- qualification testing
- qualitifier
- quanta
- quantization error
- quantized form
- quantum efficiency
- quantum transition
- quarter wavelength
- quarter-channel
- quaternary signal
- quaternion function
- queueing theory
- pulling-in
- pulsating auroras
- pulse dispersion