IRB may refer to:

Look up IRB in Wiktionary, the free dictionary.

Organizations

• Immigration and Refugee Board of Canada, a Canadian administrative tribunal
• Indian Reserve Battalion, a special unit of the Indian Police Force
• Institut Ruđer Bošković ( Ruđer Bošković Institute), a Croatian research institute
• Institutional review board, a committee to monitor research involving humans
• Instituto de Resseguros do Brasil, a Brazilian reinsurance company
• Instituto Ricardo Brennand, a museum in Recife, Brazil
• International Rugby Board, the former name of World Rugby, the governing board of rugby union
• IRB Infrastructure, an Indian road infrastructure company
• Irish Republican Brotherhood, an Irish secret revolutionary society of the 19th and early 20th centuries

Technology

• Interactive Ruby Shell, a shell for programming in Ruby
• ASEA IRB, a line of industrial robots

Other

• Inflatable rescue boat, a rubber boat with an outboard motor used in surf lifesaving
  • IRB racing
• Internal ratings-based approach (credit risk), a method for estimating bank capital requirements
• Internal Revenue Bulletin, a weekly publication of the U.S. Internal Revenue Service
• Internal Ratings Based approach, a method of assessing Bank capital requirements
• Ian Rank-Broadley, British sculptor and designer of the fourth coinage portrait of Elizabeth II
• Indian Rocks Beach, a city in Pinellas County, Florida

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