Rwanda Bureau of Standards Resource Breakdown Structure Robbed Bit Signaling Random Barrage System Rutherford Backscattering Spectrometry Rutherford backscattering spectroscopy Radar Bomb Scoring Radio Base Station Risk Breakdown Structure Robbed-Bit Signaling Radar Bind Speed Readiness Based Sparing Really Big Screen Recreational Boating Safety Reliability Based Sparing Ribosome Binding Site Royal Ballet School Rural Business-Cooperative Service Radar Beacon System Radar Bombardment System random blood sugar Rare Book School reactor building spray Reactor Building Sump receptor binding site Recoverable Booster System red blood cell Redeemer Baptist School Reference Base Stations refractive backscattering