English abbreviations from ris to rit
- 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"))
- RISE (Reliability Improved Selected Equipment)
- RISK (Reciprocity, Interdependency, Sharing, and Keeping)
- RISM (Receuil International De Sources Musicales)
- RISOP (Red Integrated Strategic Offensive Plan)
- RISP (Runners in Scoring Position)
- RIST (Rule Induction and Statistical Testing)
- RISTA (Reconnaissance, Intelligence, Surveillance, and Target Acquisition (see also ISTAR))
- Rit. (Ritus ("Rite", "Rites"))
- RIT (Read In Text)