ADR or adr may refer to:

Aviation

  • Accident data recorder, or flight data recorder
  • Adria Airways, an airline of Slovenia
  • IATA airport code for Robert F. Swinnie Airport in Andrews, South Carolina, US

Companies

  • Applied Data Research, a large software vendor from the 1960s until the mid-1980s

Computing

  • Action–domain–responder architectural pattern
  • The adr microformat, part of the hCard microformat
  • Advanced Digital Recording, a magnetic tape data storage format.
  • Architectural decision record
  • Asynchronous DRAM refresh, an approach for persistent memory found in some Intel Xeon processors

Entertainment

  • Alter Der Ruine, an American powernoise music group
  • Automated dialogue replacement, a post-production process in filmmaking

Law and finance

  • Alternative dispute resolution
  • American depositary receipt, a method of trading non-U.S. stocks on U.S. exchanges
  • Average daily rate, a common lodging industry statistic

Science and medicine

  • Adiabatic demagnetization refrigeration
  • Adrenodoxin-NADP+ reductase, an enzyme
  • Adverse drug reaction
  • Artificial disc replacement, a surgical procedure
  • Astra Digital Radio, a digital radio transmission system

Transportation

  • Active debris removal, an action or policy for enhancing space transport safety
  • ADR (treaty), a treaty governing transport of hazardous materials
  • Airdrie railway station, United Kingdom
  • Ardeer railway station, Melbourne

Sports

  • AD Renting (cycling team), a Belgian professional cycling team that existed from 1987 to 1989
  • Alan Docking Racing, British motor racing team
  • Alberto Del Rio (born 1977), Mexican professional wrestler
  • Alice Davidson-Richards (born 1994), English cricketer

Other uses

  • Académie de Roberval, a school in Montreal, Quebec, Canada
  • Adonara language, a Central Malayo-Polynesian language of Indonesia
  • ADR rose, a rose trial winner
  • Alternative Democratic Reform Party, a political party in Luxembourg
  • Australian Design Rules, a set of construction standards for road registered vehicles in Australia
  • Automated Demand response (Auto-DR), the automation by electric grid utilities to curtail load for various cost savings strategies.
  • Automotive dead reckoning, GNSS-assisted dead reckoning for vehicles
  • Axiom of real determinacy
  • Azerbaijan Democratic Republic (1918–1920), a precursor state to modern Azerbaijan