ARR

ARR or Arr may refer to:

People

 * Jonny Arr (born 1988), English rugby union player
 * A. R. Rahman (born 1967), Indian film composer, record producer, musician and singer

Places

 * Arr, Mauritania, a town

Science and technology

 * Absolute risk reduction, a statistical term used in biostatistics and epidemiology
 * Address-range register, in computer hardware
 * Aldosterone-to-renin ratio, a hormone/enzyme blood concentration
 * Application Request Routing, a proxy-based routing module for Internet Information Services, a Windows-based web server

Transportation

 * Air Armenia, ICAO airline code ARR
 * Alaska Railroad, reporting mark ARR
 * Alberta Resources Railway
 * Arram railway station, England, National Rail code ARR
 * Aurora Municipal Airport (Illinois), FAA airport code ARR
 * Alto Río Senguer Airport, Argentina, IATA code ARR

Other uses

 * "Arr!", a phrase used by pirates in popular culture
 * Average Run Rate method, in cricket
 * Accounting rate of return, a financial ratio
 * Aeronautica Regala Romana, or Royal Romanian Air Force
 * Ramarama language, ISO 639-3 code arr
 * Artist's resale right or droit de suite, royalties to the original artist upon resale
 * Annual Recurring Revenue is a type of revenue stream
 * All rights reserved
 * Arranged by