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