- punching code
- punching mechanism
- punching station
- punching track
- punctuation
- punctured disk
- pure subgroup
- purely inseparable
- purge date
- purging
- pursue
- push
- push instruction
- push operation
- push-down
- push-up
- pushdown stack
- pusher block
- pythagorean number
- Quadratic equation
- quadratic field
- quadratic involution
- quadratic transformation
- quadrature amplifier
- quadrature modulation
- quadric quantie
- quadrivalent
- quadruplicate
- quadword
- qualified name
- qualitative data
- quantitative method
- quantizer
- quantum
- quantum computer
- quarantine service
- quarter pitch
- quartering
- quartic
- quartic surface
- quasi-asymptote
- quasi-elliptic
- quasi-field
- quasi-inverse
- quasi-language
- quasi-monochromatic
- quasi-plane
- quasi-syntax
- quasielliptic geometry
- quaternary
- quaternary form
- quaternary quartic
- quaternion algebra
- QUERTY keyboard
- query
- query command
- query facility
- query language
- query mode
- query reply
- questionnaire
- queue
- queue element
- queued cell
- quick access
- quick cell
- quick query
- quick sort
- quiesce
- quiesce protocol
- quiesce state
- quiescent
- quiescent state
- quiet mode
- Pythagorean relation
- quadrangular
- quadrantal angle
- quadratic
- quadratic estimator
- quadratic function
- quadratic programming
- quadric surface
- quadruplex circuit
- qualified area
- Qualifying Product
- quality control
- quality degradation
- quanta response
- quantifier
- quantum effect
- quartic equation
- quasi
- quasi-group
- quasi-sufficiency
- quasiconcave
- quasinormed space
- quaternary quantie
- query program
- queue block
- queue file