ISOThe main function is to provide a mechanism for people to reach agreement on the development of international standards。Its main institutions and operating rules are set out in a document called the ISO/IEC Technical Work Guidelines，Its technical structure is 800 technical committees and sub-committees in ISO,Each of them has a chairperson and a secretariat，The Secretariat is held by each Member State,There are 30 member groups that undertake the work of the Secretarial State，The secretariats are in direct contact with the ISO Central Secretariat in Geneva。
Through these working bodies，ISO has published 9,200 international standards,Such as ISO metric threads、A4 paper size for ISO、ISO's container series(95% of the world's shipping containers comply with ISO standards)、The film speed code for ISO、ISO's open systems are interconnected(OS2) series(It is widely used in the field of information technology)and the well-known ISO9000 quality management series of standards。
furthermore,ISO also liaises with 450 international and regional organizations on standards,In particular with the International Telecommunication Union(ITU)There is a close connection。There are a total of 28 international standards bodies outside the ISO/IEC system。Each agency sets some international standards in a particular area,Usually they are under the control of the United Nations。A case in point is the World Health Organization(WHO).85% of international standards set by ISO/IEC，The remaining 15 per cent is set by these 28 other international standards bodies。
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