ISO 9000 grew out of BS 5750, a standard published by the British Standards Institution (BSI) in 1979. Initially, it was used only in manufacturing industries. ISO 9000 is now employed across a variety of other types of businesses. It is a set of international standards of quality management systems. ISO 9000 has been accepted by more than 100 countries as their national quality assurance standard by the end of 1997.