Acronyms, Abbreviations, and Initialisms.
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The meaning of the Acronym RIO is...

RIO is

Remote Instant Office
Research Instruction Online
Really Innovative Original

More Meanings For RIO:

Random Access Memory Input Output
Riada Internet Objects
Radx Input Output
Resources Input Optimization
Remote Input Output
RAM (Random Access Memory) Input/ Output
Red Iron Oxide
Ressoruces Input Optimisation
Restore Iraqi Oil
Review International Organization
Re Integration Of Offenders
Rdf I O
Radar Intelligence Officer
Readiness Input And Output
Remote Instant Office

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