Glossary: International Organization for Standardization (ISO)

responsible for the ISO 9000, ISO 14000, ISO 27000, ISO 22000 and other international management standards, including the ISO 14000 series which deals with environmental management systems, eco-labeling, life cycle assessment, product category rules, and environmental product declarations.  ISO is not a certification itself but rather a standard to which some certifications adhere.  

http://www.iso.org/iso/home/standards.htm