ARL

ARL may refer to:

In military:

• The United States Navy hull classification symbol for the Achelous class repair ship (Auxiliary Repair Light)
• Admiralty Research Laboratory, a UK military research laboratory
• The United States Army Research Laboratory
• ARL 44, a French heavy tank designed during the later stages of World War II

In science and academia:

• Air Resources Laboratory, an air quality and climate laboratory National Oceanic and Atmospheric Administration (NOAA)
• Alden Research Laboratory
• Amps for Running Load (an electrical rating, especially when motors are involved); this is also known as Amps for Full Load (AFL) or Full Load Amps (FLA)
• Applied Research Laboratories:
  • Claude Wendell Horton, Sr. and J. J. Pickle Research Campus operated by the University of Texas at Austin
  • Pennsylvania State University Applied Research Laboratory
• Association of Research Libraries, a nonprofit organization of libraries in the US and Canada

In sports:

• Auckland Rugby League, the city's administrative body for rugby league
• Australian Rugby League, the nation's administrative body for rugby league

In transportation:

• Aero Research Limited, a UK company involved in the development of aircraft adhesives
• Airport rail link
  • Suvarnabhumi Airport Rail Link in Bangkok, Thailand
• Arlesey railway station, United Kingdom, from its National Rail code
• Armour Refrigerator Line, a private refrigerator car line
• Arly Airport (IATA airport code)

Others:

• Akamai Resource Locator
• Animal Rescue League of Iowa
• Animal Rescue League of Western Pennsylvania,
• Art Loss Register
• Authority revocation list