The current revision (ISO 9001:2008) was created in November 2008. (See what is ISO 9001)
ISO 9001:2000 was a major overhaul and replaced three standards:
The revision allowed exceptions to design and development procedures if a company does in fact NOT engage in the creation of new products, as well as introducing a few concepts:
For more details, please see: Compare ISO 9001:1994 to ISO 9001:2000
ISO 9000:1994 emphasized quality assurance via preventive actions, instead of final product inspection, requiring evidence of compliance with documented procedures.
ISO 9000:1987 was based on BS 5750, with three quality management systems depending on the activities of the organization: