RDO may stand for: Radom Airport, Poland, IATA code Radio Dom Ostankino, Russian broadcaster and member of the European Broadcasting Union Ranidel de Ocampo (born 1981), Filipino basketball player Raster Document Object (.rdo), a file format used in print on demand systems manufactured by Xerox Rate–distortion optimization, a decision algorithm used in video compression Remote Data Objects, a deprecated Microsoft technology Relational Database Operator, a query interface for the Oracle Rdb database Red Hat Distribution of OpenStack, a community-supported distribution of OpenStack launched by Red Hat in 2013 Red Dead Online, a 2019 video game Regular Democratic Organization, a historical political group based in New Orleans, United States