regi - resi
- regime
- region
- region of admissible deviations
- region of convergence
- region of non-operation
- region of operation
- region of phase
- regional automatic circuit exchange
- regional broadcasting station
- regional coding enhancement
- regional exchange
- regional playback control
- regional radio-paging service
- regional television
- register
- register addressing
- register and arithmetic-logic unit
- register array
- register bay
- register capacity
- register card
- register code signal
- register connector
- register controller
- register finder
- register key
- register length
- register mark
- register pilot lamp
- register pointer
- register printer
- register ratio
- register reading
- register release
- register rotation
- register signal
- register signalling
- register stack
- register storage capacity
- register system
