ISO is an international standard-setting body established in 1947 that has published over 18,000 standards. ISO 22000 specifies requirements for a food safety management system that can be applied throughout the food supply chain. It aims to ensure safe food and facilitate international trade. Key aspects of ISO 22000 include identifying food safety hazards, establishing prerequisite programs and implementing a HACCP plan. There are also supporting standards for specific industries like manufacturing and catering that provide additional requirements. Certification to ISO 22000 allows companies to demonstrate their food safety system to customers and authorities.