Ro or RO may refer to:
Romania ( ( listen) ro-MAY-nee-ə; Romanian: România [romɨˈni.a]) is a sovereign state located at the crossroads of Central, Eastern, and Southeastern Europe.
Ronald Wilson Reagan (; February 6, 1911 – June 5, 2004) was an American politician and actor who served as the 40th President of the United States from 1981 to 1989. Prior to the presidency, he was a Hollywood actor and trade union leader before serving as the 33rd Governor of California from 1967 to 1975.
Roger Federer (German pronunciation: [ˈrɔdʒər ˈfeːdərər]; born 8 August 1981) is a Swiss professional tennis player who is currently ranked world No.
Rome (Italian: Roma i[ˈroːma]; Latin: Roma [ˈroːma]) is the capital city of Italy and a special comune (named Comune di Roma Capitale).
Robin McLaurin Williams (July 21, 1951 – August 11, 2014) was an American actor and comedian. Born in Chicago, Williams started as a stand-up comedian in San Francisco and Los Angeles in the mid-1970s.
Rock music is a broad genre of popular music that originated as "rock and roll" in the United States in the early 1950s, and developed into a range of different styles in the 1960s and later, particularly in the United Kingdom and in the United States.
The Royal Navy (RN) is the United Kingdom's naval warfare force. Although warships were used by the English kings from the early medieval period, the first major maritime engagements were fought in the Hundred Years War against the Kingdom of France.