RR
RR or rr may refer to:
Arts and entertainment
- RR (film), a 2008 experimental film by James Benning
- Ruff Ryders Entertainment, a record label and East Coast rap collective
- Randy Rhoads (1956–1982), American guitarist
- Jackson "Randy Rhoads", electric guitar design by Randy Rhoads, Grover Jackson, and Mike Shannon
Businesses and organizations
- Railroad Retirement, retirement benefits railroad workers
- Rashtriya Rifles, an Indian counter-insurgency force
- Rekords Rekords (logo), an American record label
- Rhodesia Regiment, Rhodesian Army unit
- Royal Air Force (IATA airline designator)
- Richard Rohac (logo), an Austrian art metal firm
- ITU Radio Regulations
Language
- rr (digraph)
- Revised Romanization of Korean, the official Korean language romanization system in South Korea
- Revised Romanization of Hangeul, the former official Hangeul language romanization system in South Korea
Science and technology
Biology and medicine
- RR, an Rh factor phenotype
- RR, abbreviation for blood pressure measurements taken with a sphygmomanometer invented by Scipione Riva-Rocci
- RR interval (R wave to R wave interval), the inverse of heart rate
- Relative risk, in statistics and epidemiology
- Respiratory rate, a vital sign
Other uses in science and technology
- Rapid Refresh, a short-range numerical weather prediction model
- Rear-engine, rear-wheel-drive layout, a term used in automotive technology
- Resource record, in the Domain Name System
- Round-robin scheduling, an algorithm for coordinating processes in an operating system
- rr (debugging), a record and replay debugger for userspace Linux programs
Sports
- Rajasthan Royals, an Indian Premier League franchise
- Ranchi Rhinos, a defunct Hockey India League franchise
- Run rate, an average number of runs a batsman (or the batting side) scores in an over of 6 balls in cricket
Transportation
- Railroad
- Rolls-Royce plc (LSE code and logo)
- RR, a predecessor of the R (New York City Subway service)
- Regional Road, a class of road in Ontario
Other uses
- Roraima (ISO 3166 code BR-RR), a state in Brazil
See also
This disambiguation page lists articles associated with the title RR.
If an internal link led you here, you may wish to change the link to point directly to the intended article.
If an internal link led you here, you may wish to change the link to point directly to the intended article.