ISO $9000$ refers to the

standards for the registration and certification of a manufacturer's quality management and assurance system developed by the U S$.$ Department of Commerce.

International Safety Organization responsible for establishing international guidelines for products designed for and targeted at children.

worldwide standards for environmental quality and green marketing practices developed by the International Standards Organization.

standards for the registration and certification of a manufacturer's quality management and assurance system based on an on$-$site audit of practices and procedures developed by the International Standards Organization.

$9,000$ major product and industry classifications used in the WTO Product Classification System.