- queue name
- queuing
- queuing theory
- quick closedown
- quick format
- quick reference
- Quick Viewer
- quiesce communication
- quiesce counter
- quiescing
- quieting control
- quintic
- quinary
- quinary code
- quintet
- quintic curve
- quintic equation
- Quintile
- quintilre
- quintuple
- quintuple space
- quit
- quota
- quota sample
- quotation
- quote
- quotient algebra
- quotient field
- quotient group
- quotient mapping
- quotient module
- quotient ring
- quotient semigroup
- quotient set
- quotient space
- quotients
- qwerty
- R-up
- rabbet joint
- race
- race condition
- race track
- RACF database
- RACF indicator
- RACF protected
- RACF segment
- radar charts
- radar scanner
- radial approach
- radial measurements
- radial network
- radial selector
- radial transfer
- radial transformation
- radian
- radiate power
- radiated power
- radiating element
- radiation efficiency
- radical
- radical center
- radical circle
- radical displacement
- radical elimination
- radical group
- radical strain
- radical stress
- radicand
- radio broadcasting
- radio button
- radio communication
- radio control
- radio electronics
- radio geometry
- radio net
- radio pulse
- radio recognition
- radio repeater
- radio scanner
- radio station
- radio tank
- radio transmission
- radio-gram
- radix transformation
- ragged text
- railway engine
- radius
- radix
- radix complement
- radix notation
- radix point
- radix sorting
- rag
- ragged left
- ragged right
- RAM resident
- ramification field
- ramified
- random coupling
- random experiment