Abbreviations beginning with r

RNHSRichland Northeast High School (Columbia, SC)
Miscellaneous

RNHSRomblon National High School (Odiongan, Romblon, Philippines)
Miscellaneous

RNHSRutland Natural History Society (Rutland, England, UK)
Miscellaneous

RNIRadio Network Interface
Academic & Science

RNIRadio Northsea International
Academic & Science

RNIRassemblement National des Indépendants (French: National Rally of Independents, Morocco)
Academic & Science

RNIRate of Natural Increase
Academic & Science

RNIRaw Native Interface (Sun)
Academic & Science

RNIRayonnements Non Ionisants (French: Non-Ionizing Radiation)
Academic & Science

RNIReactive Nitrogen Intermediate
Academic & Science

RNIRecommended Nutrient Intake (aka Recommended Nutritional Intake)
Academic & Science

RNIRedwood Neuroscience Institute
Academic & Science » Universities

RNIRegistrar of Newspapers for India
Academic & Science

RNIRelative Needs Index (study; various locations)
Academic & Science

RNIRelative Noncentrality Index
Academic & Science

RNIRemote Network Processor
Academic & Science

RNIResearch Network Incorporated
Academic & Science » Universities

RNIRete Nazionale Interbancaria (Italian: National Interbank Network)
Academic & Science