ARR or Arr may refer to:

Look up arr or ärr in Wiktionary, the free dictionary.

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

• Arr, Mauritania, a town

• 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

• 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

• "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

• All pages with titles beginning with ARR
• All pages with titles containing ARR

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