Organizations
- Rio All Suite Hotel and Casino, a resort in Las Vegas, USA, that opened in 1990
- Rio Tinto Group, a multinational mining and resources group founded in 1873
- Rio Group, founded 1986, an international organization of Latin American states
- Rio Convention, one of several commonly used "Rio" nicknames for the 1992 Convention on Biological Diversity
- rio, pronunciation of RHIO, Regional Health Information Organization, a type of organization whose purpose is integration and information exchange among healthcare stakeholders
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