- reprographics
- repsentation space
- repudiation
- request
- request data
- request decomposition
- request header
- request message
- request mode
- request stack
- request unit
- requester
- requeue
- required
- required hyphen
- required list
- required parameter
- required space
- requirements analysis
- requisite
- requisite variety
- reroute connection
- rerouting
- rerun mode
- rerun point
- rerun routine
- rerun time
- resampling
- resave
- rescale
- rescue dump
- rescue point
- resdistribution
- research facility
- research group
- research library
- research network
- research organization
- research report
- resemblance
- reservation
- reserve accumulator
- reserve character
- reserved character
- reserved filename
- reserved name
- reserved word
- reservoir
- reset
- reset button
- reset circuit
- reset condition
- reset cycle
- reset key
- reset mode
- reset pulse
- reshape
- reside
- resident data
- resident file
- resident font
- resident program
- resident routine
- resident software
- residual
- residual error
- residual spectrum
- residual variance
- residuate
- residue arithmetic
- residue check
- residue stress
- resistance
- resistance coupling
- resizer
- resolution
- resolution error
- resolve
- resolvent kernel
- resolver
- resolving time
- resonance amplifier
- resonance bar
- resonance characteristic
- resonance indicator
- resonance radiation
- resonant mixer
- resonant transition
- resound
- resource attribution
- resource data
- resource definition
- resource document
- resource file
- resource identifier
- resource level
- resource management
- resource object
- resource pool
- resource recovery