Source : http:// advisera.com /9001academy/knowledgebase/infographic-iso-90012015-vs-2008-revision-what-has-changed/
ISO 9000 was first published in 1987. It was based on the BS 5750 series of standards from BSI that were proposed to ISO in 1979. However, its history can be traced back some 20 years before that, to the publication of the United States Department of Defense MIL-Q-9858 standard in 1959. MIL-Q-9858 was revised into the NATO AQAP series of standards in 1969, which in turn were revised into the BS 5179 series of guidance standards published in 1974, and finally revised into the BS 5750 series of requirements standards in 1979 before being submitted to ISO. The first revision was done in 1994, and the standard was issued as a quality assurance system. At this point, the standard had three sub-standards: ISO 9001, ISO 9002, and ISO 9003.