RNS may be an initialism for:
Rabid Neurosis, a music piracy organisation RNS formalism in the string theory of physics Reactive nitrogen species Regulatory News Service Religion News Service Rennes - Saint-Jacques Airport, France, IATA code Residue numeral system in mathematics Responsive neurostimulation device, an epilepsy treatment Reticulum Network Stack, cryptography-based networking stack "R.N.S.", a song by Slaughterhouse from Southpaw: Music from and Inspired By the Motion Picture