ISO 9000 specifies requirements for a Quality Management System overseeing the production of a product or service. It is not a standard for ensuring a product or service is of quality; rather, it attests to the process of production, and how it will be managed and reviewed. 

For ex a few: 

ISO 9000:2000.
Quality management systems. Fundamentals and vocabulary .

ISO 9000-1:1994. 
Quality management and quality assurance standards. Guidelines for selection and use.

ISO 9000-2:1997.
Quality management and quality assurance standards. Generic guidelines for the application of ISO 9001, ISO 9002 and ISO 9003.

ISO 9000-3:1997.
Quality management and quality assurance standards. Guidelines for the application of ISO 9001:1994 to the development, supply, installation and maintenance of computer software.

ISO 9001:1994. 
Quality systems. Model for quality assurance in design, development, production, installation and servicing.

ISO 9001:2000. 

Quality management systems. Requirements.