"IAB" previously stood for Internet Activities Board.
Internet Architecture Board
(www.iab.org) Founded in 1983 as the Internet Activities Board, it is a volunteer organization that provides architectural guidance to and adjudicates conflicts for the Internet Engineering Task Force (IETF). It appoints the IETF Chair and all other Internet Engineering Steering Group (IESG) candidates. It also advises the Internet Society (ISOC) relating to technical and procedural matters.