English abbreviations from rii to rio
- RII (Request for Intelligence Information)
- RIJS (Reischauer Institute of Japanese Studies)
- RIK (Carrillo Airport)
- RIL (Garfield County Regional Airport)
- RILA (Retail Industry Leaders Association)
- RILO (Readiness Index For Learning Online)
- RIM (Remote integrated multiplexer, Australian term for a digital loop carrier)
- RIMC (Rashtriya Indian Military College)
- RIMM (RAMBUS In-line Memory Module)
- RIMP (Research Institute For Medicinal Plants)
- RIMPAC (Rim of the Pacific)
- RIMS (Riser Integrity Monitoring System)
- RIMVS (Retinal Imaging Machine Vision System)
- RIN (the former Royal Indian Navy)
- RIND (Reversible ischemic neurologic deficit)
- RINO (Republican In Name Only[1])
- RIO (Radar Intercept Officer)