- relative invariant
- relative organization
- relative position
- relative vector
- relatively
- relativistic
- relay calculator
- relay-operated
- release
- release number
- release position
- relevance
- reliable link
- reload
- relocatable segment
- relocating loader
- relocation factor
- REM statement
- remainder
- remainder operator
- remainder theorem
- remainder type
- remanent
- remanent magnet
- remarkable
- remedial maintenance
- remember condition
- reminder
- remittance
- remodulator
- remote
- remote access
- remote alarm
- remote assistance
- remote booting
- remote communications
- remote computing
- remote connection
- remote console
- remote control
- remote controlled
- remote controller
- remote copier
- remote debugging
- remote destination
- remote diagnosis
- remote dictation
- remote display
- remote echo
- remote host
- remote indicator
- remote inquiry
- remote key
- remote learning
- remote loading
- remote location
- remote login
- remote machine
- remote maintenance
- remote manipulator
- remote measurement
- reentrant
- reentrant subroutine
- refer
- reference bit
- reference instruction
- reference language
- reference model
- reference parameter
- reference recording
- reference time
- reference work
- refinement
- reflexive processing
- Refresh Data
- refreshable display
- regeneration buffer
- regenerative storage
- region class
- regional address
- regional breakpoint
- register
- register assignment
- register circuit
- register insertion
- registered access
- registered call
- registered table
- registrable resource
- registration-identifier
- regression analysis
- regression estimate
- regressive
- regressive definition
- regressive interpolation
- Regret matrix
- regroup
- regular
- regular asteroid
- regular convergence