BDO International is a worldwide network of public accountancy firms, serving national and international clients. Each BDO Member Firm is an independent legal entity in its own country. The network, originally formed in 1963 as Binder Seidman International Group, is coordinated by BDO Global Coordination B.V., with an office in Brussels, Belgium. The name BDO, first devised in 1973, is an acronym of Binder Dijker Otte & Co.
As at 30 September 2010, BDO Member Firms in 119 countries employed 38,922 professionals in 1,082 offices throughout the world.
Global fee income of all BDO Member Firms for the year ending 30 September 2010 totalled € 3,893 million (US$ 5,284 million), making BDO International the fifth largest accounting firm network globally.