ISO 9000 is primarily concerned with quality management. The definition of "quality" in ISO 9000 refers to all those features of a product or a service which are required by the customer.
Quality management means what the organization does to ensure that its products conform to the customer's requirements.
ISO Guide 34:1996
Quality system guidelines for the production of reference materials
ISO 8402:1994
Quality management and quality assurance -- Vocabulary
ISO 9000-1:1994 Quality management and quality assurance standards -- Part 1: Guidelines for selection and use
ISO 9000-2:1997 Quality management and quality assurance standards -- Part 2: Generic guidelines for the application of ISO 9001, ISO 9002 and ISO 9003
ISO 9000-3:1997
Quality management and quality assurance standards -- Part 3: Guidelines for the application of ISO 9001:1994 to the development, supply, installation and maintenance of computer software
ISO 9000-4:1993
Quality management and quality assurance standards -- Part 4: Guide to dependability program management
ISO 9001:1994 Quality systems -- Model for quality assurance in design, development, production, installation and servicing
ISO 9002:1994 Quality systems -- Model for quality assurance in production, installation and servicing
ISO 9003:1994 Quality systems -- Model for quality assurance in final inspection and test
ISO 9004-1:1994
Quality management and quality system elements -- Part 1: Guidelines
ISO 9004-2:1991 Quality management and quality system elements -- Part 2: Guidelines for services
ISO 9004-3:1993 Quality management and quality system elements -- Part 3: Guidelines for processed materials
ISO 9004-4:1993
Quality management and quality system elements -- Part 4: Guidelines for quality Improvement