The meaning of the Acronym RIO is...

RIO is

• Rail Incident Officer

More Meanings For RIO:

• Red Iron Oxide
• Remote Instant Office
• Research Instruction Online
• Really Innovative Original
• Radar Intercept Officer
• Regional Inspection Officer
• Radio Information Officer
• Reviewers International Organization
• Random Access Memory Input Output
• Riada Internet Objects
• Radx Input Output
• Resources Input Optimization
• Remote Input Output
• RAM (Random Access Memory) Input/ Output
• Radar Intercept Officer

RIO is also in:

• Chemistry
• General
• Hardware
• Media
• Military
• Positions