English abbreviations from rio to risd
- RIO (Radar Intercept Officer)
- RIP (Relief In Place)
- R.I.P. (Requiescat In Pace ("May he or she rest in peace"))
- RIPE (Race Integrity Primitives Evaluation)
- RIPL (Recon and Interdiction Planning Line)
- RIPS (Regulated Intelligent Power Supply)
- RIQ (Really Interesting Questions)
- RIQI (Rhode Island Quality Institute)
- RIR (Flabob Airport)
- RIS (Rail Interface System)
- RISC (Reduced Instruction Set Computer)
- RISC OS (Reduced Instruction Set Computer Operating System)
- RISD (Rhode Island School of Design ("riz-dee"))