ISO has developed many types of standards, but when it comes to the most memorable development in the area of management systems, ISO 9001 is one of the most significant. It is part of the ISO 9000 family of standards, focusing on quality management systems (QMS). ISO 9001 was first published in 1987 and has since become the most widely recognized and implemented management standard worldwide.

The ISO 9001 standard provides a framework for companies to ensure they consistently meet customer and regulatory requirements while striving for continuous improvement. Over the years, ISO has expanded its range of management system standards to include other areas, such as:

1. ISO 14001 – Environmental Management System (EMS)
2. ISO 45001 – Occupational Health and Safety Management System (OHSMS)
3. ISO 27001 – Information Security Management System (ISMS)
4. ISO 50001 – Energy Management System (EnMS)
5. ISO 22301 – Business Continuity Management System (BCMS)
6. ISO 22000 – Food Safety Management System (FSMS)

These standards aim to help organizations manage different aspects of their operations systematically, leading to improved performance, risk management, and customer satisfaction.