IRB

Noun

• Initialism of {{w|nodot=1}}, a committee that reviews the designs of proposed experiments to confirm whether all the methods proposed are ethical.
• Initialism of investment review board, a committee of business executives who review investment choices, comparing against strategy and opportunity costs.
• Initialism of internal review board, an internal affairs division of a police department.

Adjective

• Initialism of internal ratings-based approach

Proper Noun

• Initialism of {{w|dot=,}} a secret organisation dedicated to the establishment of an "independent democratic republic" in Ireland between 1858 and 1924.
• Initialism of w:World Rugby the name used by World Rugby, the worldwide governing body for [[rugby union, from 1998 to 2014.