RN
- rn – (s) Rundi language (Kirundi) (ISO 639-1 code)
- Rn – (s) Radon
- RN – (a) Radio Netherlands
- RN – (i) Royal Navy – Registered Nurse (US)
- RNA – (i) RiboNucleic Acid
- RNAD – Royal Naval Armaments Depot (UK)
- RNPS – (i) Radio Network Planning System
- RNZ – (a) Radio New Zealand
- RNZI – (a) Radio New Zealand International
Read more about this topic: List Of Acronyms And Initialisms: R