RBrunswick-Balke-Callender(aircraft company; manufacturer's symbol) RResuspension Factor RRadial Antenna RConfidential - Restricted Data(TMINS) RUS Revenue Stamp(Scott Catalogue prefix; philately) RCorrected search radius('R nought'; R rounded up) ...
MRAMaritime Reconnaissance Aircraft MRAMitsubishi Rayon America(New York, NY) MRAManeuver Rights Area MRAMarket Rate Account(saving mechanism) MRAMunitions Response Area(US DoD) MRAMasters Rowing Association MRAMutant Registration Act(X-Men) MRAMagneto-Resistive Asymmetry(hard disk drives) ...
RBrunswick-Balke-Callender(aircraft company; manufacturer's symbol) RResuspension Factor RRadial Antenna RConfidential - Restricted Data(TMINS) RUS Revenue Stamp(Scott Catalogue prefix; philately) RCorrected search radius('R nought'; R rounded up) ...