IAG

IAG means
 * Internal Assessment Guidelines
 * International Airlines Group, one of the world's largest airline groups. IAG is the holding company of Aer Lingus, British Airways, Iberia and Vueling.
 * Inter-Agency Group on Economic and Financial Statistics

''The Inter-Agency Group on Economic and Financial Statistics includes the Bank for International Settlements (BIS), the European Central Bank (ECB), Eurostat, the International Monetary Fund (IMF), the Organization for Economic Co-operation and Development (OECD), the United Nations (UN) and the World Bank (WB). It is chaired by the International Monetary Fund.''