- RIO
- Rock In Opposition (Regional » Language Codes (3 Letters))** Ride It Out (Governmental » Transportation)* Remote Input Output (Computing » General)* Radar Intercept Officer (Business » Positions)* Radar Intercept Officer (Governmental » Military)* Reviewers International Organization (Community » Media)* Red Iron Oxide (Academic & Science » Chemistry)* Research Instruction Online (Business » General)* Rail Incident Officer (Governmental » Police)* Riada Internet Objects (Computing » General)* Resources Input Optimization (Computing » General)* Radio Information Officer (Community » Media)* Remote Instant Office (Business » General)* Radx Input Output (Computing » General)* Random Access Memory Input Output (Computing » General)* Really Innovative Original (Business » General)* RAM (Random Access Memory) Input/ Output (Computing » Hardware)* Rio De Janeiro International Airport, Rio De Janeiro, Rio de Janeiro, Brazil (Regional » Airport Codes)
Abbreviations dictionary. 2012.