Give in detail Origin and relevance of ISO 9000?

Give in detail Origin and relevance of ISO 9000?
ISO 9000 grew out of the old BS 5750, a standard created and published by the British Standards Institution (BSI) in 1979.
It was used only in manufacturing industries. ISO 9000 however, its been used across many other industries.The criteria is set by international standards of quality management systems. ISO 9000 was accepted by more than 120 countries as their national quality assurance standard by the end of 1997 and has increased in significance ever since. The latest platform is ISO 9001:2008. Many organisations who contract work out look for this in their potential sub contractors.