R

  Radio button
  Random Access Memory
  RAM
  Range
  Raster
  Rate
  RAW
  Ray Tracing
  Reassembler
  Record
  Recoverable Alert
  Refresh
  Rename
  ReqTools(.library)
  Request
  Requester
  Requirements
  Reset
  Resident
  Resolution
  Restore
  Retrace
  Retry
  RGB
  Ribbon
  ROM
  Root block
  Row
  Run