RAR

RAR or Rar may refer to:

• Radial acceleration relation (RAR), a relation derived from studying the radial acceleration traced by rotation curves in galaxies
• Radio acoustic ranging, a non-visual technique for determining a ship's position at sea
• "rar", the ISO 639-2 code for the Cook Islands Māori language
• RAR (file format), a proprietary compressed archive file format in computer software
• Rarotonga International Airport, Cook Islands, IATA code RAR
• Rarus, or Rar, a figure in Greek mythology
• Retinoic acid receptor, a type of protein
• Rhodesian African Rifles, a unit of the Rhodesian Army
• Rock Against Racism, a UK movement
• Rock am Ring and Rock im Park, a German rock music festival
• Royal Australian Regiment, a unit of the Australian Army
• Ruger American Rifle, a line of centerfire bolt-action rifles
• Grupo RAR, a Portuguese company
• WinRAR, RAR, and UNRAR computer software for compressed archive files
• Ridotto Alpino Repubblicano, Republican Alpine Redoubt (RAR), intended last stronghold of the Italian fascists at the end of World War II
• Rarh region, region in eastern India