ISO 9001 is an international Standard. It's one of the most widely known and internationally accepted models for a quality system, and the basis of many highly effective quality systems.
ISO 14001:2015 is applicable to any business that wishes to establish, implement, maintain and improve an environmental management system and conform to its stated environmental policy.
OHASAS 18001 can be adopted by any organization wishing to reduce the risks associated with health and safety in the working environment for employees, customers and the general public.
ISO 22000:2005 specifies requirements for a food safety management system where an organization in the food chain needs to demonstrate its ability to control food safety hazards in order to ensure that food is safe at the time of human consumption.
specifies the requirements for establishing, implementing, operating, monitoring, reviewing, maintaining and improving a documented Information Security Management System within the context of the organization's overall business risks.
ISO 50001:2011 specifies requirements for establishing, implementing, maintaining and improving an energy management system.