ARR
ARR is an abbreviation for:
- Absolute risk reduction measure of therapy effectiveness, see Relative and absolute risk reduction
- Adolf Reich wine -Realschule ( Witten)
- Alaska Railroad, American Railway Company
- All Real Records, German hip-hop record label, see Curse
- Andøya Rakettskytefelt, a rocket launch site on the Norwegian island Andøya
AR -R stands for:
- Province of Río Negro, Argentina (country code according to ISO 3166-2 )
Arr is in music for:
- Arranged, see Arrangement
- Disambiguation
- Abbreviation