Romanian Civil Aviation Authority罗马尼亚民航权威 Royal Canadian Artillery Association皇家加拿大炮兵协会 Rocket City Astronomical Association天文学协会的火箭城市 Radio Code Aptitude Area无线电通信简语适用范围 Runs Created Above Average (baseball statistic)运行创造高于平均水平(棒球统计) Rock Crawlers Association of America (formerly American Rock Crawlers Association)岩石的爬行动物协会(原美国摇滚的爬行动物协会) Root Cause Alarm Analysis (Telcordia)Telcordia根源分析法(报警) Rollins College Alumni Association˙罗林斯大学校友会